Experimental and numerical investigations of propeller open water characteristics in calm water and regular head waves
Artikel i vetenskaplig tidskrift, 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.

Regular head waves

Verification and validation

Torque

Thrust

CFD

EFD

Författare

Mohsen Irannezhad

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Martin Kjellberg

RISE Research Institutes of Sweden

Rickard Bensow

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Arash Eslamdoost

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Ocean Engineering

0029-8018 (ISSN)

Vol. 302

Propeller-skrov interaktionseffekter i vågor - del 2

Trafikverket, 2021-05-01 -- 2023-10-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Ämneskategorier

Vattenteknik

Farkostteknik

Strömningsmekanik och akustik

Marin teknik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.oceaneng.2024.117703

Mer information

Senast uppdaterat

2024-05-30