Propeller hydrodynamic characteristics in oblique flow by unsteady ranse solver

• Autorzy: Nouroozi H. , Zeraatgar H.
• Języki publikacji: EN

Abstrakty

EN

Propellers may encounter oblique flow during operation in off-design conditions. Study of this issue is important from the design and ship performance points of view. On the other hand, a propeller operating in oblique flow may sometimes result in a better propulsion efficiency. The main goal of the present study is to provide an insight on the propeller characteristics in the oblique flow condition. In this research, the performance of the DTMB 4419 propeller is studied by the numerical method based on solving Reynolds Averaged Navier‒Stokes (RANS) equations in several inflow angles. The sliding mesh approach is used to model the rotary motion of the propeller. Initially, the numerical method is verified by grid and time step dependency analysis at various inflow angles. Additionally, computed results at zero inflow angle are compared with the available experimental data and good agreement is achieved. Finally, the forces and moments acting on the propeller are obtained for 0° to 30° inflow angles. It is concluded that the inflow angle up to 10° has no significant influence on the thrust and torque coefficients as well as the propeller efficiency. However, at high angles up to 30°, the thrust and torque coefficients increase as the inflow angle increases, which may result in a significant improvement of propeller efficiency

• Wydawca: -
• Czasopismo: Polish Maritime Research
• Rocznik: 2020
• Tom: 27
• Numer: 1
• Opis fizyczny: p.6-17,fig.,ref.

Twórcy

autor

Nouroozi H.

• Amirkabir University of Technology, Hafez, 15875-4413 Tehran, Iran

autor

Zeraatgar H.

• Amirkabir University of Technology, Hafez, 15875-4413 Tehran, Iran

Bibliografia

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Identyfikatory

DOI

10.2478/pomr-2020-0001