上海交通大学学报(自然版) ›› 2014, Vol. 48 ›› Issue (08): 1059-1064.

• 交通运输 • 上一篇    下一篇

泵喷推进器空化特性数值分析

施瑶,潘光,王鹏,杜晓旭
  

  1. (西北工业大学  航海学院,水下航行器研究所,西安 710072)
     
     
     
  • 收稿日期:2013-12-02 出版日期:2014-08-28 发布日期:2014-08-28
  • 基金资助:

    国家自然科学基金(51279165),国防基础研究项目(B2720132014)资助

Numerical Simulation of Cavitation Characteristics of a Pump-Jet Propeller

SHI Yao,PAN Guang,WANG Peng,DU Xiaoxu
  

  1. (School of Marine Science and Technology,  Institute of Underwater Vehicle,Northwestern Polytechnical University, Xi’an 710072, China)
  • Received:2013-12-02 Online:2014-08-28 Published:2014-08-28

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.
 
 

关键词: 泵喷推进器, 空化特性, 数值分析, 滑移网格, 敞水效率

Abstract:

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.
 

Key words: pump-jet propeller, cavitation characteristics, numerical simulation, sliding mesh, open water efficiency

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