Numerical investigation of pressure pulse predictions for propellers mounted on an inclined shaft
Paper i proceeding, 2019

In the presented study, two high-skew model scale marine propellers were tested in the cavitation tunnel and the induced pressure pulses were measured during the test. Propeller shaft was inclined about 10 degrees to create blade load variations. The cavitation pattern were recorded using high speed videos. The open-source package openFOAM and commercial package Star-ccm+ are used as simulation tools to predict pressure pulses numerically. By using the fully turbulent SST k − ω model, the predicted wetted flow pressure pulse levels agreed well compared to experimental measurements, but together with Schnerr-Sauer cavitation mass transfer model, massive cavitation was predicted which lead to inaccurate pressure pulse predictions. The transition sensitive turbulence model γ − Re θ model is used to study the cases, and simulation results reveal the existence of laminar-transition zone and vortex structures on the propeller blades. Attempts are made to linking correlation-based separation region from the transition model and the cavitation model, and good predictions of cavitation pattern are achieved but the predicted pressure pulses levels are merely improved.

Marine propeller

Transition

Cavitation

Pressure pulse

URANS

Författare

Muye Ge

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Urban Svennberg

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Rickard Bensow

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Proceedings of the Sixth International Symposium on Marine Propulsors

2414-6129 (ISSN)

Vol. 1

Sixth International Symposium on Marine Propulsors (smp19)
Rome, ,

Ämneskategorier

Maskinteknik

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Mer information

Skapat

2020-01-14