Search results for: ANNULAR/CIRCULAR FGM ROTATING DISK

• NUMERICAL SIMULATIONS OF GAP FLOW ABOVE ROTATING DISK

  Publication

  • F. Wasilczuk
  • P. Flaszyński
  • P. Doerffer

  - TASK Quarterly - Year 2015

  A rotating disk can be considered a basic configuration for the investigati ons of the impact of various conditions on the flow through the clearance between the s hrouded turbine blade and the casing. Numerical calculations using Fine/Turbo Numeca were conducted to examine the influence of the rotational velocity and the pressure differ ence across the disk on the flow conditions, especially the mass flow through the clearance....

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• Elastoplastic nonlinear FEM analysis of FGM shells of Cosserat type

  Publication

  • S. Burzyński
  • J. Chróścielewski
  • K. Daszkiewicz
  • W. Witkowski

  - COMPOSITES PART B-ENGINEERING - Year 2018

  The paper is a continuation of [1] where the formulation of the elastic constitutive law for functionally graded materials (FGM) on the grounds of nonlinear 6-parameter shell theory with the 6th parameter (the drilling degree of freedom) was presented. Here the formulation is extended to the elasto-plastic range. The material law is based on Cosserat plasticity and employs the well-known Tamura-Tomota-Ozawa (TTO) [2] mixture...

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• Chladni and circular saw disc vibrations visualisation

  Publication

  • L. Javorek
  • K. Orłowski

  - Year 2011

  In this paper are described some methods for saw disc vibration monitoring in march of time (chronology). Ernst Chaldni, the father of sound visualisation and his patternsis are mentioned. In the last partof article are introduced results received with authors measuring systems.

• Circular Farmaceutica

  Journals

  ISSN: 0009-7314

• Comparison of natural frequencies of a circular saw blade obtained empirically and with FEM

  Publication

  • A. D. Kaczmarek-Penia•kova
  • K. Orłowski
  • L. Javorek

  - Annals of WULS, Forestry and Wood Technology - Year 2016

  The knowledge of the natural frequencies’ values of circular saw blades is necessary to determine the minimal critical rotational speed in which they can work with required stability. Moreover, testing the circular saw blades with more complicated shapes, e.g. which have additional holes inside blades for cleaning knifes or additional indirect teeth in gullets, reveals some kind of problematic properties of these saw blades. The...

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• RADIATION OF HIGH INTENSITY SOUND BY CIRCULAR DISC BY MEANS OF THE NUMERICAL METHOD

  Publication

  • G. Grelowska
  • E. Kozaczka

  - HYDROACOUSTICS - Year 2014

  The main goal of this paper is to find sound pressure distribution radiated by the circular piezoelectric disc that vibrates with the finite amplitude. There has been presented the pressure distribution close to the radiating surface. Also it is shown the sound pressure distribution in the 3D form. The mathematic modeling was carried out on the base of the nonlinear acoustic equation with the proper boundary condition. The axial...

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• A study of cavitation erosion resistance of an ion nitrided titanium alloy by means of the vibration and rotating disk methods

  Publication

  • V. Safonov
  • A. Zykova
  • J. Steller
  • M. Szkodo
  • G. Gajowiec
  • J. Chmiel
  • A. Varhoshkov

  - Journal of Physics : Conference Series - Year 2024

  In this work, a comparative analysis of the cavitation erosion resistance of the Ti– 6.7Al–2.5Mo–1.8Cr–0.5Fe–0.25Si alloy (known as brand VT3-1) before and after lowtemperature ion nitriding is carried out. Two test methods were applied, using vibrative (ASTM G-32) and rotating disk rigs, respectively. The kinetic dependences of the erosive destruction of samples of titanium alloy VT3-1 in the initial state, after ion nitriding...

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• THE USE OF FEM FOR DETERMINATION OF RESONANT FREQUENCIES OF CIRCULAR SAW BLADES WITH INDIRECT TEETH IN GULLETS

  Publication

  • A. D. Kaczmarek-Penia•kova
  • K. Orłowski

  - Trieskove a Beztrieskove Obrabanie Dreva - Year 2016

  Understanding the dynamical properties of the circular saw blade is necessary, since, there is a really need for a stable work at working rotational speeds, which are determined by frequencies at which the circular saw blade tends to vibrate. It was observed that the resonant frequency depend on the circular saw blade shape, a collar diameter and on saw’s teeth shape. In the presented work an attention was paid to the effect of...

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• Modelling of dryout process in an annular flow

  Publication

  • D. Mikielewicz
  • J. Mikielewicz
  • J. Wajs
  • M. Gliński

  - HEAT TRANSFER RESEARCH - Year 2008

  W pracy pokazano teoretyczny model kryzysu wrzenia przy wysokich stopniach suchości, który jest modyfikacją modelu proponowanego wcześniej przez Sedlera i Mikielewicza. Model wysychania filmu cieczowego w przepływie pierścieniowym składa się z różniczkowych równań bilansu masy zapisanych dla filmu na ściance i kropel w rdzeniu przepływu. Rozwiązanie układu równań wymaga znajomości gęstości strumienia masy kropel wytrącających się...

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• Dryout in annular flow - theoretical analysis

  Publication

  • D. Mikielewicz
  • J. Wajs
  • M. Gliński
  • A. R. Zrooga

  - Archives of Thermodynamics - Year 2009

  W pracy zaprezentowano model kryzysu wrzenia w przepływie pierścieniowym, obowiązujący dla wysokich wartości stopnia suchości i stanowiący modyfikację wcześniejszej wersji modelu zaproponowanego przez Sedlera i Mikielewicza. Model ten uwzględnia bilans masy w filmie cieczowym i bilans masy dla kropel cieczy w rdzeniu przepływu oraz zawiera dodatkowy człon odpowiedzialny za odparowanie filmu na ściance kanału. Rozwiązanie układu...

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