华中科技大学学报：自然科学版2012，Vol.40Issue(2)：18-22,5.
螺旋桨空化崩溃性能图谱的多相流模拟
Multiphase flow simulation and propeller cavitation breakdown performance maps
摘要
Abstract
In order to improve the multiphase viscous simulation precision of propeller cavitating per- formances, NSRDC4381 propellerr s sheet cavitation pattern and cavitating breakdown performance maps were conducted, using the mixture multiphase model which contained both of the non-condensa-ble gas （NCG） mass and volume fractions effects in the mixture density, the phase-changing threshold pressure accounting for the effect of turbulence, the improved Sauer cavitation model which got the NCG mass and volume fraction were7.8×10^-1and 1.0×10^-6 respectively and the bubble initial radi-us was 1.5 μm, and the modified shear stress transport turbulence model. The results show that predicted cavitation breakdown performance maps are fit very well with the experiment data. Under undesign condition, the simulated cavity pattern is under-estimate but similar to that in reference usingSauer cavitation model. Under moderated and severe cavitation conditions, thrust and torque coefficient prediction are obvious better than the reference using Kunz cavitation model, especially up to 16% for the severe condition. Even under the highly-loaded and severe cavitation condition, predictionerrors of thrust and torque coefficients are 4.95% and 2.28% respectively, which gives a qualification of the numerical models and can be used to predict the cavitation inception in the next step.关键词
螺旋桨/空化模型/湍流模型/多相流模拟/空化崩溃性能Key words
propeller/cavitation model/turJoulence model/multiphase flow simulation/cavitationbreakdown performance分类
交通工程引用本文复制引用
杨琼方,王永生,张志宏..螺旋桨空化崩溃性能图谱的多相流模拟[J].华中科技大学学报：自然科学版,2012,40(2):18-22,5.基金项目
国家自然科学基金资助项目（51009144）. （）
