Numerical Simulation of Tip Vortex Cavitation Inception
Paper i proceeding, 2021

Tip vortex cavitating flow is known as challenging to study. The objective of this paper is to investigate the effective parameters in numerical modelling of tip vortex cavitation (TVC) inception through the comparison of three different models. The models are (1) a commonly used homogenous mixture model, in which inception is based on pressure drop criterion; (2) a Lagrangian bubble model, in which cavitation is initiated from free nuclei in the liquid; and (3) a hybrid Eulerian-Lagrangian model, in which the cavities are initiated based on the pressure drop criterion, but the growth of initially small cavities are modelled using the more accurate Lagrangian equations. The simulations are conducted on the tip vortex flow around an elliptical foil. The results show that the commonly applied pressure drop assumption is not a sufficient criterion for cavitation inception. Also, it is seen that the water quality and nuclei transport towards the vortex core influence the cavity pattern at inception.

Tip vortex cavitation

Lagrangian bubble model

Cavitation inception

Författare

Ebrahim Ghahramani

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Urban Svennberg

Kongsberg Maritime

Rickard Bensow

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Proceedings of the 11th International Symposium on Cavitation (CAV2021)

P00081

11th International Symposium on Cavitation 2021 (CAV2021)
Daejeon, South Korea,

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Ämneskategorier

Teknisk mekanik

Energiteknik

Strömningsmekanik och akustik

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

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Senast uppdaterat

2021-06-27