流体机械

2017, v.45;No.544(10) 31-36+63

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旋涡泵压力脉动特性的研究
Study on Pressure Fluctuation Characteristics of a Minivortex Pump

俞健;秦子明;方超;蔡标华;张露;吴大转;
YU Jian;Qin Zi-Ming;FANG Chao;CAI Biao-hua;ZHANG Lu;WU Da-zhuan;Wuhan Second Ship Design and Research Institute;Zhejiang University;

摘要(Abstract):

旋涡泵作为低比转速泵越来越多地应用于船舶、航天航空和化工等领域。但是旋涡泵内部的流体压力脉动会引起泵和装置的振动噪声问题,成为高性能旋涡泵设计应用过程亟待解决的问题。本文通过数值模拟和试验分析相结合的方法分析一台旋涡泵的压力脉动特性,并探讨通过非等距叶片分布方式以降低压力脉动的方法。结果表明:叶片均布条件下,叶频是压力脉动的主要频率,且在阻隔面附近叶频的幅值最大。与均布叶片旋涡泵相比,非等距分布叶片旋涡泵在不影响其性能的同时能够显著降低在叶频处的脉动峰值,但在叶频两侧产生了附加的频率,而振动总级有明显的下降。该研究为减小旋涡泵的压力脉动和泵体振动提供了一个可行方案,对含旋涡泵系统的减振降噪具有参考意义。
The vortex pump,asatype of low specific pump,is more and more widely used in ship,aerospace and chemical engineering etc. However,the pressure fluctuation of fluid in the vortex pump would cause the vibration and noise of the pump and equipment,which has becomeone of the key issues needed to be solved in the design and application of high-performance vortex pump. This paper analyzed the characteristic of pressure fluctuation of a mini vortex pumpby the method of numerical simulation and experiment,and this paper alsodiscussed a random distribution method applied to reduce the pressure fluctuation. The results show that under the condition of even blade spacing,the blade passing frequency was dominative in the pressure fluctuation,and the pressure pulse amplitudes area was close to the stripper. The study also indicated that uneven circumferential spacing would yield additional frequency in the spectrum compared with even one and reduce the magnitude of the blade passing frequency and the total level of vibration markedly without decreasing the performance of the pump sharply. This paper proves a feasible scheme to reduce pressure fluctuation and vibration in a vortex pump,which is significatefor the vibration and noise reduction of the system with vortex pump.

关键词(KeyWords): 旋涡泵;压力脉动;非等距分布;随机分布
vortex pump;pressure fluctuation;uneven spacing;random distribution

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作者(Authors): 俞健;秦子明;方超;蔡标华;张露;吴大转;
YU Jian;Qin Zi-Ming;FANG Chao;CAI Biao-hua;ZHANG Lu;WU Da-zhuan;Wuhan Second Ship Design and Research Institute;Zhejiang University;

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