Experimental and numerical investigations of propeller open water characteristics in calm water and regular head waves
Journal article, 2024

Propeller Open Water (POW) performance of a non-ventilating and fully-submerged propeller in model-scale is investigated in calm water and regular head waves using experimental tests (EFD) and Computational Fluid Dynamics (CFD). Laminar flow dominance is observed in calm water, particularly at higher advance ratios. Nevertheless, the findings in waves suggest increased turbulence, stemming from both the wave orbital velocities and the presumably increased turbulence level produced by the wave maker in the towing tank. Analysis of the CFD results obtained from the incident flow field and single-blade force and moment leads to the speculation that the observed discrepancies are associated with the inevitable asymmetric conditions and mechanical interference in the experiments which were absent in CFD. These can potentially alter the flow over the blades resulting in a different flow transition, separation, and coherent turbulent structure formation and hence forces and moments. The altered propeller performance in waves in comparison to calm water underlines the significance of waves on the propulsive factors and propeller design.

Torque

Regular head waves

Thrust

CFD

EFD

Verification and validation

Author

Mohsen Irannezhad

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

Martin Kjellberg

RISE Research Institutes of Sweden

Rickard Bensow

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

Arash Eslamdoost

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

Ocean Engineering

0029-8018 (ISSN)

Vol. 302

Propeller-hull interaction effects in waves - part 2

Swedish Transport Administration, 2021-05-01 -- 2023-10-31.

Driving Forces

Sustainable development

Areas of Advance

Transport

Energy

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Vehicle Engineering

Fluid Mechanics and Acoustics

Marine Engineering

DOI

10.1016/j.oceaneng.2024.117703

More information

Created

4/4/2024 7