Bubble behavior in cavitating flow is analyzed for the development of practical erosion prediction method. CFD analysis with cavitation model is carried out for the flow field around a hydrofoil. Afterwards computation of bubble dynamics is carried out coupled with flow field CFD results by one way approach. For the bubble dynamic calculation, Rayleigh-Plesset equation is adopted. Bubble behaviors in the collapse of cloud cavitaion and in the break off of sheet cavity are analyzed. Bubble behavior at the trailing edge of sheet cavity is also calculated. It is observed that steep pressure change in the flow causes oscillation of the bubbles. Based on this qualitative information of bubble behaviors, numerical cavitation aggressiveness is simply defined. This numerical cavitation aggressiveness is a function of local void fraction and pressure over the solid surface and can be calculated directly from the cavitating flow field CFD results without concerning bubble dynamics.
|ホスト出版物のタイトル||2008 Proceedings of the ASME Fluids Engineering Division Summer Conference, FEDSM 2008|
|出版ステータス||Published - 2009 9月 21|
|イベント||2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008 - Jacksonville, FL, United States|
継続期間: 2008 8月 10 → 2008 8月 14
|Other||2008 ASME Fluids Engineering Division Summer Conference, FEDSM 2008|
|Period||08/8/10 → 08/8/14|
ASJC Scopus subject areas