Zhengfang Qian
Naval Academy of Armament, China
Title: Research on sheet cavitation numerical predicted and estimation of tip vortex cavitation inception of ducted propeller with pre-swirl stator
Biography
Biography: Zhengfang Qian
Abstract
In the paper, the research on sheet cavitation numerical predicted and estimation of tip vortex cavitation inception of ducted propeller with pre-swirl stator behind underwater vehicle was carried out. Firstly, the sheet cavitation shape of ducted propeller with pre-swirl stator was numerically simulated using a hybrid mesh based on RANS (Reynolds Averaged Navier Stokes) solver. A Singhal cavitation model based on transport equation was coupled in the RANS solver. The predicted sheet cavitation shapes were in good agreement with experimental observation. The overall results suggest that the present approach on predicting sheet cavitation shape of propeller behind underwater vehicle is practicable. Secondly, the wetted flow of ducted propeller with pre-swirl stator behind underwater vehicle was simulated, and the tip vortex cavitation inception was estimated based on the minimum pressure value on the propeller tip section. The results were also in good agreement with experimental results. It showed that the approach on estimation of tip vortex cavitation inception is feasible.
