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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
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
关键词
泵喷推进器
空化特性
数值分析
滑移网格
敞水效率
pump-jet propeller
cavitation characteristics
numerical simulation
sliding mesh
open water efficiency
