螺旋桨梢涡空泡初生及尺度效应研究  

Study on prediction of tip-vortex cavitation inception

作　　者：熊鹰[1] 韩宝玉[1] 时立攀[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《船舶力学》2013年第5期451-459,共9页Journal of Ship Mechanics

基　　金：国家自然科学基金(51079157)

摘　　要：应用气泡动力学方程和气泡运动微分方程研究了螺旋桨梢涡空泡的初生问题,并根据简化Reyleigh-Plesset方程推导了不同尺度模型空化初生空泡数换算公式,建立了空化初生尺度换算模型,研究了螺旋桨梢涡空泡初生尺度效应问题。螺旋桨梢涡流场应用RANS方法求解,湍流模型为经过旋转和曲率修正的代数雷诺应力模型(EARSM-CC)。计算结果表明,文中建立的数值方法能够准确预报出螺旋桨梢涡流场分布;螺旋桨梢涡空泡初生空泡数计算结果高于试验观察值;应用文中建立的空化初生尺度换算模型得到的结果与数值模拟结果基本吻合,而且其结果偏于安全。The inception of propeller tip vortex cavitation is investigated by tion and bubble motion equation. A new sealing relation model about tip vortex ward by means of simplifying Reyleigh-Plesset equation together with scaling using bubble dynamics equacavitation inception is put forlaw of minimum pressure coefficient. The scaling effects of tip vortex cavitation inception among different scale models are studied. The propeller tip vortex flowfield is calculated using RANS method and the explicit algebraic Reynolds stress model with rotation-curvature correction is adopted. The calculated results show that the numerical method can exactly predict the velocity distribution in tip vortex flowfield. The predicted cavitation inception number is higher than that of experimental result. The results predicted by scaling relation model agree well with the simulated result by numerical method and are more conservative.

关 键 词：气泡动力学 空泡初生 尺度效应 旋转和曲率修正 

分 类 号：U661.31[交通运输工程—船舶及航道工程]