Rok 2018

• Longitudinal Motion Due to Action of Tunnel Thrusters

  Publikacja

  • M. Reichel

  - Polish Maritime Research - Rok 2018

  Tunnel thrusters are propulsion and active control devises that provide a side force, or transverse thrust, to support mooring operations or position keeping. They shorten the time of manoeuvring, reduce the cost of towage and since inception, manoeuvrability specifically in ports has become a lot easier. Tunnel thrusters can either be operated manually or with the help of Dynamic Positioning systems which makes it even more efficient. Theoretically,...

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• MEMS Technology Quality Requirements as Applied to Multibeam Echosounder

  Publikacja

  • K. Bikonis
  • J. Demkowicz

  - Polish Maritime Research - Rok 2018

  Small, lightweight, power-efficient, and low-cost microelectromechanical system (MEMS) inertial sensors and microcontrollers, available in the market today, help reduce the instability of Multibeam Sonars. Current MEMS inertial measurement units (IMUs) come in many shapes, sizes, and costs — depending on the application and performance required. Although MEMS inertial sensors offer affordable, appropriately scaled units, they are...

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• Mobile Laser Scanning Calibration on a Marine Platform

  Publikacja

  • J. Szulwic
  • P. Tysiąc

  - Polish Maritime Research - Rok 2018

  The article describes the method of calibration of the Riegl VMZ-400 mobile scanning system on a floating platform and an experiment aimed at conducting measurements from a previously calibrated instrument. The issue of factors affecting the quality of measurements was discussed. Mobile laser scanning is an increasingly popular measurement solution, but it is still innovative on a European scale. The use of a floating platform...

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• Modeling of the Two-Dimensional Flow Caused by Sea Conditions and Wind Stresses on the Example of Dead Vistula

  Publikacja

  • P. Zima

  - Polish Maritime Research - Rok 2018

  The article presents the results of two-dimensional modeling of flows caused by the sea conditions and wind stresses on the example of Dead Vistula. Based on the available bathymetric data, a numerical model of the river section was created, which was supplemented with data on the position of the water table depending on hydrometeorological conditions. To describe the flow field in steady conditions, a simplified model of two-dimensional...

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• Multi-objective weather routing of sailboats considering wave resistance

  Publikacja

  • M. Życzkowski
  • P. Krata
  • R. Szłapczyński

  - Polish Maritime Research - Rok 2018

  The article presents a method to determine the route of a sailing vessel with the aid of deterministic algorithms. The method assumes that the area in which the route is to be determined is limited and the basic input data comprise the wind vector and the speed characteristic of the vessel. Compared to previous works of the authors, the present article additionally takes into account the effect of sea waves with the resultant resistance...

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• NetBaltic System-Heterogenous Wireless Network for Maritime Communications

  Publikacja

  • M. Hoeft
  • K. Gierłowski
  • J. Rak
  • J. Woźniak

  - Polish Maritime Research - Rok 2018

  In case of maritime communications, we observe a growing interest in deployment of multitask satellite-based solutions and development of new maritime-specific systems intended for improvements in safety of e-navigation. Analysis of different types of currently used maritime communication systems leads, however, to a conclusion that neither global and still very expensive satellite systems nor cheaper, but short-ranged transmission...

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• New Concept of Numerical Ship Motion Modelling for Total Ship Operability Analysis by Integrating Ship and Environment Under One Overall System

  Publikacja

  • H. Olszewski
  • M. H. Ghaemi

  - Polish Maritime Research - Rok 2018

  The paper presents a new concept of overall ship motion modelling for application to total ship operability. The delivered model is a multi-phase and includes both submerged part of ship’s hull and the surrounding water as a unique body. The Discrete Finite Element Method is applied. The model is successfully examined and illustrated for a selected AHTS.

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• NON-LINE ANALYSIS OF STIFFNESS IN COMPRESSION CONDITIONS

  Publikacja

  • M. Kahsin
  • D. Stecki

  - Polish Maritime Research - Rok 2018

  The analyzes were aimed at demonstrating the influence of parameters describing the deformation of the structure on the uncertainty of critical force, and the impact of technological imperfections on stress uncertainty in compression conditions. In a linear buckling analysis, the problem is considered only for the initial, permanent state of the stiffness matrix. In the case of demonstrating the influence of initial deformations...

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• NUMERICAL MODEL OF PLASTIC DESTRUCTION OF THICK STEEL STRUCTURAL ELEMENTS

  Publikacja

  • J. Kowalski
  • J. Kozak

  - Polish Maritime Research - Rok 2018

  In the shipbuilding industry, the risk of brittle fracture of the structure is limited by using certified materials with specified impact strength, determined by the Charpy method (for a given design temperature) and by supervising the welding processes (technology qualification, production supervision, non-destructive testing). For off-shore constructions, classical shipbuilding requirements may not be sufficient. Therefore, the...

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Rok 2013

• Losses and energy efficiency of drive motors and systems

  Publikacja

  • Z. Paszota

  - Polish Maritime Research - Rok 2013

  Losses and energy efficiency of every drive motor must be presented as functions of physical quantities independent of losses in the motor. Such quantities are speed and load required by the machine or device driven by the motor, changing in the drive operating field. Speed and load of the motor decide of the instantaneous useful power of the motor and also in a differentiated way of kinds and values of losses occurring in the...

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• Method of determining the degree of liquid aeration in a variable capacity displacement pump

  Publikacja

  • Z. Paszota

  - Polish Maritime Research - Rok 2013

  The Author concludes, that there is a possibility of determining a concrete value of the liquid aeration coefficient during the pump operation by finding such value of coefficient with which the increase of torque of mechanical losses is proportional to the indicated torque determined with a fixed value of increase of pressure in the pump working chambers. The fixed value of increase of pressure assumed in searching the liquid...

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• Multi-source-supplied parallel hybrid propulsion of the inland passenger ship STA.H. Research work on energy efficiency of a hybrid propulsion system operating in the electric motor drive mode

  Publikacja

  • W. Litwin
  • W. Leśniewski
  • J. Kowalski

  - Polish Maritime Research - Rok 2013

  In the Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, design has recently been developed of a small inland ship with hybrid propulsion and supply system. The ship will be propelled by a specially designed so called parallel hybrid propulsion system. The work was aimed at carrying out the energy efficiency analysis of a hybrid propulsion system operating in the electric motor drive mode and at...

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• Multi-stage magnetic-fluid seals for operating in water - life test procedure, test stand and research results. Part II Results of life tests of multi-stage magnetic - fluid seal operating in water

  Publikacja

  • L. Matuszewski

  - Polish Maritime Research - Rok 2013

  The edge criteria for magnetic-fluid seals durability research were described in previous article [24] and now the tests results are presented. The tests were made with three magnetic fluids using various magnets quantity in magnetic assemblies. If values obtained in the repeated test deviated by more than 10 % from results of the first test an additional control test was made for final characteristics. The characteristics are:...

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Rok 2023

• Management Strategy for Seaports Aspiring to Green Logistical Goals of IMO: Technology and Policy Solutions

  Publikacja

  • T. T. Le
  • H. P. Nguyen
  • K. Rudzki
  • L. Rowiński
  • V. D. Bui
  • T. H. Truong
  • H. C. Le
  • N. D. K. Pham

  - Polish Maritime Research - Rok 2023

  Recently, because of serious global challenges including the consumption of energy and climate change, there has been an increase in interest in the environmental effect of port operations and expansion. More interestingly, a strategic tendency in seaport advancement has been to manage the seaport system using a model which balances environmental volatility and economic development demands. An energy efficient management system...

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Rok 2007

• Manoeuvring forces on azimuthing podded propulsor model

  Publikacja

  • M. Reichel

  - Polish Maritime Research - Rok 2007

  This paper presents the preliminary part of comprehensive manoeuvring open- water tests of a gas carrier model. The paper focuses on open water experiments with an azimuthing podded propulsor. The test program was carried out in the cavitation tunnel and the large towing tank of Ship Hydromechanics Division, Ship Design and Research Centre, Gdańsk. The pod was tested as a pushing unit with a 161.3 mm diameter propeller. Steering...

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Rok 2017

• MAPPING SOUTH BALTIC NEAR-SHORE BATHYMETRY USING SENTINEL-2 OBSERVATIONS

  Publikacja

  • A. Chybicki

  - Polish Maritime Research - Rok 2017

  One of the most promising new applications of remote observation satellite systems (RO) is the near-shore bathymetry estimation based on spaceborn multispectral imageries. In recent years, many experiments aiming to estimate bathymetry in optically shallow water with the use of remote optical observations have been presented. In this paper, optimal models of satellite derived bathymetry (SDB) for relatively turbid waters of the...

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• Modelling and Simulation of a New Variable Stiffness Holder for Milling of Flexible Details

  Publikacja

  • K. J. Kaliński
  • M. Galewski
  • M. Mazur
  • M. Chodnicki

  - Polish Maritime Research - Rok 2017

  Modern industry expectations in terms of milling operations often demand the milling of the flexible details by using slender ball-end tools. This is a difficult task because of possible vibration occurrence. Due to existence of certain conditions (small depths of cutting, regeneration phenomena), cutting process may become unstable and self-excited chatter vibration may appear. Frequency of the chatter vibration is close to dominant...

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• Multi-objective weather routing of sailing vessels

  Publikacja

  • M. Życzkowski
  • R. Szłapczyński

  - Polish Maritime Research - Rok 2017

  The paper presents a multi-objective deterministic method of weather routing for sailing vessels. Depending on a particular purpose of sailboat weather routing, the presented method makes it possible to customize the criteria and constraints so as to fit a particular user’s needs. Apart from a typical shortest time criterion, safety and comfort can also be taken into account. Additionally, the method supports dynamic weather data:...

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• Numerical Modelling of Structures with Uncertainties

  Publikacja

  • M. Kahsin

  - Polish Maritime Research - Rok 2017

  The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling...

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Rok 2016

• MAPSERVER – INFORMATION FLOW MANAGEMENT SOFTWARE FOR THE BORDER GUARD DISTRIBUTED DATA EXCHANGE SYSTEM

  Publikacja

  • M. Blok
  • S. Kaczmarek
  • M. Młynarczuk
  • M. Narloch

  - Polish Maritime Research - Rok 2016

  In this paper the architecture of the software designed for management of position and identification data of floating and flying objects in Maritime areas controlled by Polish Border Guard is presented. The software was designed for managing information stored in a distributed system with two variants of the software, one for a mobile device installed on a vessel, an airplane or a car and second for a central server. The details...

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• Method of sum of power losses as a way for determining the ki coefficients of energy losses in hydraulic motor

  Publikacja

  • A. Maczyszyn

  - Polish Maritime Research - Rok 2016

  This paper shows application of the method of sum of power losses to determining energy losses which occur in hydraulic rotary motor in situation when not all laboratory data are at one’s disposal or when no use is made of data contained in catalogue charts. The method makes it possible to determine the coefficients ,ki , of energy losses occurring in the motor. The method of sum of power losses is based on the approach proposed...

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• Numerical Simulations of Hydrodynamic Open-Water Characteristics of a Ship Propeller

  Publikacja

  • J. Felicjancik
  • K. Sebastian
  • K. Felicjancik
  • K. Krzysztof

  - Polish Maritime Research - Rok 2016

  The paper presents the results of numerical simulations of ship propeller operation bearing the name of Propeller Open Water (POW) Tests. The object of tests was a sample ship propeller (PPTC1), the geometrical and kinematic data of which are available, along with the results of model tests, on the official page of the research centre involved in the measurements. The research aimed at verifying the correctness of results of numerical...

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• On power stream in motor or drive system

  Publikacja

  • Z. Paszota

  - Polish Maritime Research - Rok 2016

  In a motor or in a drive system the quantity of power increases in the direction opposite to the direction of power flow. Energy losses and energy efficiency of a motor or a drive system must be presented as functions of physical quantities independent of losses. Such quantities are speed and load. But the picture of power stream in a motor or in a drive system is presented in the literature in the form of traditional Sankey...

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Rok 2015

• MARITIME LASER SCANNING AS THE SOURCE FOR SPATIAL DATA

  Publikacja

  • P. Burdziakowski
  • A. Janowski
  • A. Kholodkov
  • K. Matysik
  • M. Matysik
  • M. Przyborski
  • J. Szulwic
  • P. Tysiąc
  • A. Wojtowicz

  - Polish Maritime Research - Rok 2015

  The rapid development of scanning technology, especially mobile scanning, gives the possibility to collect spatial data coming from maritime measurement platforms and autonomous manned or unmanned vehicles. Presented solution is derived from the mobile scanning. However we should keep in mind that the specificity of laser scanning at sea and processing collected data should be in the form acceptable in Geographical Information...

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• METHOD TO EXTEND OPERATIONABILITY OF WEB-GIS BASED MARINE SERVICES USING SSE PLATFORM

  Publikacja

  • K. Drypczewski
  • A. Stepnowski
  • K. Bruniecki

  - Polish Maritime Research - Rok 2015

  Earth Observation (EO) products are widely used by geospatial society. Over the last years a number of new applications of satellite imagery were proposed. This led to an increased interest in EO products, not only from researchers but also from companies and individuals. The authors constitute the essential part of the team that created the marine, web-GIS system - SafeCity GIS - for dissemination of data obtained from a 1.5...

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Rok 2010

• Mathemathical model of radial passive magnetic bearing

  Publikacja

  • L. Matuszewski
  • K. Falkowski

  - Polish Maritime Research - Rok 2010

  In the article mathematical radial model of passive magnetic bearings to ocean engineering units has been presented. The units application in underwater thrusters should increase propulsion systems durability and gives lower maintenance costs. The rotor of electric motor is hanging in magnetic field taken from radial passive magnetic bearings. However axial direction maintenance must be controlled with electromagnets and their...

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Rok 2014

• Mathematical model defining volumetric losses of hydraulic oil compression in a variable capacity displacement pump

  Publikacja

  • Z. Paszota

  - Polish Maritime Research - Rok 2014

  The objective of the work is to develop the capability of evaluating the volumetric losses of hydraulic oil compression in the working chambers of high pressure variable capacity displacement pump. Volumetric losses of oil compression must be determined as functions of the same parameters, which the volumetric losses due to leakage, resulting from the quality of design solution of the pump, are evaluated as dependent on and also...

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• Monitoring of underdeck corrosion by using acoustic emission method

  Publikacja

  • K. Emilianowicz

  - Polish Maritime Research - Rok 2014

  This paper presents first short characteristics of underdeck corrosion process as well as a problem of its monitoring. Next is described an acoustic emission (AE) method elaborated by Department of Ship Technology , Quality Systems and Material Engineering, Gdańsk University of Technology in cooperation with partners of CORFAT project realized within 7th EU Frame Program . Further are presented short characteristics of the emission...

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• Numerical Analysis of the Unsteady Propeller Performance in the Ship Wake Modified by Different Wake Improvement Devices

  Publikacja

  • J. Szantyr
  • T. Bugalski

  - Polish Maritime Research - Rok 2014

  The paper presents summary of numerical analysis of the unsteady propeller forces and induced pressure pulses generated by the selected real propeller of 7000 tons product tanker, operating in five different wakefields including four inflenced by the different wake improvement devices. The results of the analysis are partly compared with experimental data and univocal conclusions about the optimum wake improvement device are presented.

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Rok 2011

• Metody analizy zapachu

  Publikacja

  • P. Biernacka
  • T. Chmiel
  • T. Dymerski
  • W. Wardencki

  - Polish Maritime Research - Rok 2011

  Zmysł węchu to jeden z dwóch, oprócz smaku, zmysłów chemicznych. Istota tego zmysłu polega na umiejętności rozpoznawania i występowania zapachu określonych związków chemicznych lub ich mieszanin w otoczeniu. W artykule przedstawione zostały metody analizy zapachu m.in. metody klasycznej analizy sensorycznej, chromatografii gazowej połączonej z detekcją olfaktometryczną oraz elektroniczny nos.

Rok 2021

• Minimizing Greenhouse Gas Emissions From Ships Using a Pareto Multi-Objective Optimization Approach

  Publikacja

  • Z. Domachowski

  - Polish Maritime Research - Rok 2021

  To confront climate change, decarbonization strategies must change the global economy. According to statements made as part of the European Green Deal, maritime transport should also become drastically less polluting. As a result, the price of transport must reflect the impact it has on the environment and on health. In such a framework, the purpose of this paper is to suggest a novel method for minimizing emissions...

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• NEW DESIGNS OF MAGNETIC FLUID SEALS FOR RECIPROCATING MOTION

  Publikacja

  • L. Matuszewski
  • P. Bela

  - Polish Maritime Research - Rok 2021

  T he operating conditions of magnetic fluid seals during reciprocating motion are so different from those observed in rotating motion that the use of their conventional structures for reciprocating motion seals yields no good results. The analysis of the sealing mechanism of magnetic fluid seals in reciprocating motion shows that the operation of these seals is affected by the carry-over phenomenon and magnetic fluid...

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• Numerical Estimation of Hull Hydrodynamic Derivatives in Ship Maneuvering Prediction

  Publikacja

  • R. Kołodziej
  • P. Hoffmann

  - Polish Maritime Research - Rok 2021

  Prediction of the maneuvering characteristics of the ship at the design stage can be done by means of model tests, computational simulations or a combination of both. The model tests can be realized as direct simulation of the standard maneuvers with the free running model, which gives the most accurate results, but is also the least affordable as it requires very large tank or natural lake, as well as complex equipment of the...

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Rok 2019

• Model Predictive Super-Twisting Sliding Mode Control for An Autonomous Surface Vehicle

  Publikacja

  • H. Nejatbakhsh Esfahani
  • R. Szłapczyński

  - Polish Maritime Research - Rok 2019

  This paper presents a new robust Model Predictive Control (MPC) algorithm for trajectory tracking of an Autonomous Surface Vehicle (ASV) in presence of the time-varying external disturbances including winds, waves and ocean currents as well as dynamical uncertainties. For fulfilling the robustness property, a sliding mode control-based procedure for designing of MPC and a super-twisting term are adopted. The MPC algorithm has been...

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• NEW CONCEPT OF HYBRID PROPULSION WITH HYDROSTATIC GEAR FOR INLAND WATER TRANSPORT

  Publikacja

  • D. Piątek

  - Polish Maritime Research - Rok 2019

  The article presents the development of author’s concept of a diesel/hydraulic propulsion system for inland watercraft. Due to specific nature of vessel navigation on rivers, classical propulsion systems with shaft lines can be effectively replaced by systems with hydraulic power transmission. A solution is also presented of a hybrid design with extra electric port having the form of a pumping system driven from a battery of accumulators....

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• NEW DESIGNS OF CENTRIFUGAL MAGNETIC FLUID SEALS FOR ROTATING SHAFTS IN MARINE TECHNOLOGY

  Publikacja

  • L. Matuszewski

  - Polish Maritime Research - Rok 2019

  The centrifugal magnetic fluid seals have important advantage over the conventional centrifugal seals. They maintain very good sealing capacity at static, medium and high speeds of shaft rotation, with the increased seal lifetime, and minimum torque and static friction. These seals are particularly useful in cases when the angular shaft velocity varies and sometimes decreases to nearly or exactly zero, such as in flywheel applications,...

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• Numerical Analysis of an Impact of Planned Location of Sewage Discharge on Natura 2000 Areas – The Dead Vistula Region Case Study

  Publikacja

  • P. Zima

  - Polish Maritime Research - Rok 2019

  This article presents results of an analysis of impact of a designed discharge of contaminated water into the Dead Vistula (Wisła Martwa) in the region of the Isthmus (Przesmyk) with the aim of determination of a possible effect of the pollution onto protected areas of Natura 2000 (bird habitats and sites, especially the Bird Paradise – Ptasi Raj) nature reserve. The analysis was conducted on the basis of the two-dimensional modelling...

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• On some problems in determining tensile parameters of concrete model from size effect tests

  Publikacja

  • I. Marzec
  • J. Bobiński

  - Polish Maritime Research - Rok 2019

  The paper presents results of numerical simulations of size effect phenomenon in concrete specimens. The behaviour of in-plane geometrically similar notched and unnotched beams under three-point bending is investigated. In total 18 beams are analysed. Concrete beams of four different sizes and five different notch to depth ratios are simulated. Two methods are applied to describe cracks. First, an elasto-plastic constitutive law...

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Rok 2008

• Modelling of vibrations of a liquid filled tank

  Publikacja

  • K. Trębacki

  - Polish Maritime Research - Rok 2008

  Przeprowadzono analizę teoretyczną i numeryczną zbiorników długich i krótkich wypełnionych całkowicie lub częściowo cieczą. Wyznaczenie obciążeń hydrodynamicznych dotyczy bezpośrednio wytrzymałości konstrukcji samego zbiornika, a przez to pozwala określić wytrzymałość konstrukcyjną całego kadłuba. Szczególne wymagania stawiane są zbiornikom do przewozu cieczy radioaktywnych, gdyż należy zapewnić bardzo wysoki stopień bezpieczeństwa...

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• Multihull vessel excitations in stochastic formulation

  Publikacja

  • A. Królicka-Gałązka (dawniej: A. Królicka)

  - Polish Maritime Research - Rok 2008

  Praca dotyczy określania wymuszeń wielokadłubowej jednostki pływającej w ujęciu stochastycznym. Wymuszenia ruchu jednostek pływających pochodzą od ruchu fal morskich i działania wiatru. Najczęściej jest to falowanie nieregularne i dlatego w badaniach dynamiki takich jednostek zakłada się, że proces falowania ma charakter probabilistyczny. Przeprowadzono analizę dynamiki jednostki wielokadłubowej na liniowym modelu, na który działa...

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• Numerical calculations of behaviour of ship double-bottom structure during grounding

  Publikacja

  • K. Niklas

  - Polish Maritime Research - Rok 2008

  Ideą projektu CORET jest dodanie do obecnej konstrukcji dna podwójnego statku specjalnych powłok polimerowo-betonowych w celu zwiększenia odporności na rozszczelnienie podczas kolizji, czy wejścia na mieliznę. Aby poprawnie zaprojektować te bariery ochronne konieczne jest przeprowadzenie symulacji numerycznej. Tworzenie modelu numerycznego konstrukcji podczas kolizji jest bardzo złożone i wymaga wykonania symulacji pomocniczych...

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• Numerical investigations of the engine cooling system in a small power vesel pod propulsion system

  Publikacja

  • C. Dymarski
  • W. Leśniewski

  - Polish Maritime Research - Rok 2008

  The development of electronics and electrotechnology enabled to put electric motors of the alternating current in the pod and to use them for the main drive of ships. A lot of heat which must be picked up from the system is a problem which is turning up at applying the system of this type. Many big ships lately contended with these problems. Building the small propeller for the boat powered with solar power we decided to check...

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Rok 2022

• Monitoring the gas turbine start-up phase on the platform using a hierarchical model based on Multi-Layer Perceptron networks

  Publikacja

  • T. Niksa-Rynkiewicz
  • A. Witkowska
  • J. Głuch
  • M. Adamowicz

  - Polish Maritime Research - Rok 2022

  Very often, the operation of diagnostic systems is related to the evaluation of process functionality, where the diagnostics is carried out using reference models prepared on the basis of the process description in the nominal state. The main goal of the work is to develop a hierarchical gas turbine reference model for the estimation of start-up parameters based on multi-layer perceptron neural networks. A functional decomposition...

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Rok 2020

• MULTI-CRITERIA COMPARATIVE ANALYSIS OF THE USE OF SUBTRACTIVE AND ADDITIVE TECHNOLOGIES IN THE MANUFACTURING OF OFFSHORE MACHINERY COMPONENTS

  Publikacja

  • M. Deja
  • M. Siemiątkowski
  • D. Zieliński

  - Polish Maritime Research - Rok 2020

  The dynamic development of additive manufacturing technologies, especially over the last few years, has increased the range of possible industrial applications of 3D printed elements. This is a consequence of the distinct advantages of additive techniques, which include the possibility of improving the mechanical strength of products and shortening lead times. Offshore industry is one of these promising areas for the application...

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Rok 2012

• Multi-stage magnetic-fluid seals for operating in water - life test procedure, test stand and research results

  Publikacja

  • L. Matuszewski

  - Polish Maritime Research - Rok 2012

  The edge criteria for magnetic-fluid seals durability research are critical for the seal'stechnological usefulness. The magnetic fluid seal technology in water is much moredifficult technological problem in comparison to gas or vacuum environment. There isalways problem with immediate contact between magnetic fluid and the environmentaluninspected liquids. In the paper are presented ways of experiments definitions carried outwith...

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• Numerical prediction of steady and unsteady tip vortex cavitation on hydrofoils

  Publikacja

  • P. Flaszyński
  • J. Szantyr
  • K. Tesch

  - Polish Maritime Research - Rok 2012

  Artykuł przedstawia metodę numeryczną do wyznaczania kawitujących wirów wierzchołkowych powstających za płatami nośnymi. Metoda ta jest oparta na rozwiązywanie dwufazowego turbulentnego przepływu cieczy lepkiej. Pozwala ona wyznaczyć geometrię kawitującego wiru dla różnych geometrii płata nośnego i dla różnych parametrów przepływu. Pokazano porównanie wyników obliczeń z pomiarami i rejestracjami wykonanymi na modelu płata w tunelu...

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Rok 2003

• On application of the Case-Based Reasoning methods in ship automation design

  Publikacja

  • M. Meler-Kapcia
  • S. Zieliński
  • Z. Kowalski

  - Polish Maritime Research - Rok 2003

  W artykule przedstawiono metodę wnioskowania na podstawie przypadków oraz dwa przykłady jej zastosowania w projektowaniu statków. Pierwszy przykład dotyczy systemu projektowania koncepcyjnego statku. Drugi przykład odnosi się do projektowania układów automatyki okrętowej. Omówiono szczegółowo problemy doboru funkcji podobieństwa w metodzie wnioskowania na podstawie przypadków.

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• On possible lowering fuel oil consumption by differentiating loads on ship diesel engines running in parrallel.

  Publikacja

  • J. Herdzik
  • A. Balcerski

  - Polish Maritime Research - Rok 2003

  Podano możliwości zmniejszenia zużycia paliwa przez silniki okrętowe pracujące równolegle dzieki różnicowaniu ich obciążeń eksploatacyjnych. Zaprezentowano podstawy teoretyczne oraz sposób postępowania przy pomiarach zużycia paliwa w czasie rzeczywistym.

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Rok 2009

• On the modelling of aerodynamic force coefficients for over-shroud seals of turbine stages

  Publikacja

  • W. Włodarski
  • K. Kosowski

  - Polish Maritime Research - Rok 2009

  This paper presents experimental investigations which made it possible to determine dynamic coefficients of labyrinth over-shroud seal of a model air turbine. The coefficients associate pressure forces with turbine rotor displacement, velocity and acceleration respective to turbine casing (linear model) and play important role in analyzing turbine-set dynamics. The obtained results indicated that involving serious errors can be...

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• On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine at the main engine - steam turbine mode of cooperation

  Publikacja

  • M. Dzida

  - Polish Maritime Research - Rok 2009

  W pracy przedstawiono koncepcję układu kombinowanego okrętowego dużej mocy złożonego z silnika głównego tłokowego oraz skojarzonych z nim turbiny gazowej mocy i układu turbiny parowej, wykorzystujących energię zawartą w spalinach wylotowych silnika głównego tłokowego. Rozpatrywano układ kombinowany układ złożony z silnika spalinowego tłokowego skojarzony z układem turbiny parowej. Podano algorytm i obliczenia poszczególnych podukładów:...

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