摘要
以PPTC(Potsdam Propeller Test Case)桨为研究对象,进行了斜流中的螺旋桨空化及其诱导的压力脉动计算。基于均质混合流模型和Zwart-Gerber-Belamri空化模型,通过在梢涡区域进行网格加密,对梢涡空泡进行了数值模拟;计算得到的推力系数及各阶压力脉动幅值符合精度要求。研究表明:水中含气率是一个重要的计算参数,目前的算法下尚不能完全按照拖曳水池试验的实测值来设定;随着进速系数增大,推力系数减小,计算中的取值呈增大趋势;在重载时取值宜低于试验值2个量级,否则推力系数偏低且不易收敛;中载时,可以近似取试验值或略低;轻载时宜略高于试验值,否则推力系数偏高亦不易收敛。
Cavitation and cavitation induced pressure pulse in oblique flow was calculated for the propeller model PPTC.Through the partition of tip vortex field and refinement of the field gridding,tip vortex cavitation were successfully simulated.Computation results of thrust coefficient and pressure pulse based on homogeneous mixture flow model and Zwart-Gerber-Belamri's cavitation model agreed well with experimental data.It is shown that the nucleation site volume fraction has important effects on the computation result.With increase of advance coefficient and decrease of propeller's load,the values of nucleation volume fraction should be increased properly in the calculation.
作者
傅慧萍
李杰
FU Huiping;LI Jie(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China)
出处
《中国造船》
EI
CSCD
北大核心
2018年第3期1-12,共12页
Shipbuilding of China
基金
国家自然科学基金"航行体带泄气空泡出水非定常流动特性与机理研究"资助(11572194)
关键词
压力脉动
梢涡空化
螺旋桨
数值模拟
pressure pulses
tip vortex cavitation
propeller
numerical simulation
