Rok 2024

• Investigating Fuel Injection Strategies to Enhance Ship Energy Efficiency in Wave Conditions

  Publikacja

  • M. H. Ghaemi (dawniej: M. Ghaemi)
  • H. Zeraatgar
  • M. Barjasteh

  - Polish Maritime Research - Rok 2024

  The prediction of fuel consumption and resulting transportation costs is a crucial stage in ship design, particularly for conditions involving motion in waves. This study investigates the real-time fuel consumption of a container ship when sailing in waves. The overall ship performance is evaluated using a novel non-linear coupled hull-engine-propeller interaction model. A series of towing tank experiments for hull resistance in...

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Rok 2023

• Negative impact of constant RPM control strategy on ship NOx emission in waves

  Publikacja

  • M. H. Ghaemi (dawniej: M. Ghaemi)
  • H. Zeraatgar

  - International Journal of Energy and Environmental Engineering - Rok 2023

  In severe wave conditions, the ship propulsion system is loaded with high fluctuations due to external disturbances. The highly fluctuating loads enforce radical changes in the main engine torque, which in turn demands variation of the fuel rate injected into the cylinders if a constant rotational speed strategy is applied. Therefore, the temperature of gases varies to a large extent during the combustion process in the cylinders....

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• TIME-DOMAIN NUMERICAL EVALUATION OF SHIP RESISTANCE AND MOTION IN REGULAR WAVES BY USING THE CFD URANS METHOD

  Publikacja

  • M. Sadeghi
  • H. Zeraatgar
  • M. H. Ghaemi (dawniej: M. Ghaemi)
  • M. Barjasteh

  - Rok 2023

  Taking into account the International Maritime Organisation’s (IMO) strategy to radically reduce the GHG emitted by the shipping industry towards zero emission operation, today's assessment of ship behaviour in waves, its seakeeping characteristics and resistance and their interrelation with fuel consumption and emissions are one of the most attended research subject. There are three methods to conduct this analysis, which are...

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Rok 2022

• Impact of Propeller Emergence on Hull, Propeller, Engine, and Fuel Consumption Performance in Regular Head Waves

  Publikacja

  • M. H. Ghaemi (dawniej: M. Ghaemi)
  • H. Zeraatgar

  - Polish Maritime Research - Rok 2022

  In this study, the impact of propeller emergence on the performance of a ship (speed), propeller (thrust, torque, and RPM), a diesel engine (torque and RPM) and fuel consumption are analysed under severe sea conditions. The goal is to describe the variation in the system variables and fuel consumption rather than analysing the motion of the ship or the phenomenon of propeller ventilation in itself. A mathematical model of the...

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Rok 2020

• Analysis of hull, propeller and engine interactions in regular waves by a combination of experiment and simulation

  Publikacja

  • M. H. Ghaemi (dawniej: M. Ghaemi)
  • H. Zeraatgar

  - JOURNAL OF MARINE SCIENCE AND TECHNOLOGY - Rok 2020

  Analysis of hull, propeller and engine interactions in regular waves by a combination of experiment and simulation

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