Numerical analysis for pressure fluctuation of waterjet pump

被引：1
作者：
Zhang, Mingyu [1 ]
Wang, Yongsheng [1 ]
Jin, Shuanbao [1 ]
Wei, Yingsan [1 ]
Fu, Jian [1 ]
机构：
[1] College of Marine Power Engineering, Naval University of Engineering, Wuhan
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2014年 / 48卷 / 11期
关键词：
Computational fluid dynamics; Detached-eddy simulation; Pressure fluctuation; Waterjet pump;
D O I：
10.7652/xjtuxb201411009
中图分类号：
学科分类号：
摘要：
For ununiform inflow to impeller due to hull and duct, the dynamic characteristics of waterjet pump (mixed-flow pump) in patrol craft are numerically analyzed. The steady flow is simulated by SST turbulence model based on RANS and the calculated speed of ship from CFD exceeds the trial voyage by 1.8%. The unsteady flow of bare pump and the same pump fixed on craft is simulated by CFD method for DES turbulence. The pressure fluctuation of impeller inlet, impeller blade channels, impeller outlet, guide vane channels, nozzle and tip of impeller is supervised and discussed, and the difference caused by the ununiformity is also analyzed. The results show that on the impeller outlet, guide vane channels and the nozzle of both bare pump and fixed pump, the farther the flow to the impeller the weaker the pressure pulsation effects. The pressure fluctuation frequency is mainly dominated by the impeller rotation frequency, and the pressure fluctuation amplitude gradually increases from hub to tip, however, the corresponding amplitude is lager in pump fixed on craft. In the revolver impeller, the pressure fluctuation frequency is mainly dominated by the guide vanes reaction in bare pump while by shaft frequency in pump fixed on craft. The pressure fluctuation amplitude in the tip gradually increases along the axis from the leading edge to the trailing edge. In the duct outlet, the pressure fluctuation frequency is mainly dominated by the impeller rotation frequency in bare pump while by shaft frequency in pump fixed on craft. ©, 2014, Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University. All right reserved.
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页码：51 / 57and102
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