泵喷推进器空化特性数值分析  

Numerical Simulation of Cavitation Characteristics of a Pump-Jet Propeller

作　　者：施瑶[1] 潘光[1] 王鹏[1] 杜晓旭[1] 

机构地区：[1]西北工业大学航海学院,水下航行器研究所,西安710072

出　　处：《上海交通大学学报》2014年第8期1059-1064,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(51279165);国防基础研究项目(B2720132014)资助

摘　　要：利用基于Rayleigh-Plesset方程均质多相模型和滑移网格技术,对某泵喷推进器进行了三维全通道定常湍流计算,得到了其在空化条件下的性能特征.分析了转速、空泡数和进流速度对泵喷推进器的空化特性的影响.计算结果表明,泵喷推进器叶片发生空化时,推进器的推力和转矩明显下降,进而引起敞水效率的降低且降低幅度达15%以上;同一空化数下,随着转速的增加,泵喷推进器叶片的空化现象趋于明显;同一转速下,空化数越小,空化现象越显著,当空化数大于某一个特定值时,叶片的空化现象消失.The cavitation hydrodynamic performance of a pump-jet propeller was calculated and analyzed with the mixture homogeneous flow cavitation model based on Rayleigh-Plesset equations and sliding mesh.The effects of different rotational speed,cavitation number and flow velocity on cavitation characteristics of the pump-jet were studied.When the cavitation occurred on the blades,the propeller thrust and torque decreased significantly,thereby causing an open water efficiency decrease of 15%.For the same cavitation number,as the rotational speed increased,the pump-jet propeller blade cavitation phenomenon was more obvious.While for the same rotational speed,the smaller the number of cavitation,the more remarkable the cavitation phenomenon was.However,when the cavitation number was greater than a certain value,the blade cavitation phenomenon disappeared.

关 键 词：泵喷推进器 空化特性 数值分析 滑移网格 敞水效率 

分 类 号：U664.34[交通运输工程—船舶及航道工程]