Effect of inlet splitter on pressure fluctuations in a double-suction centrifugal pump
Effect of inlet splitter on pressure fluctuations in a double-suction centrifugal pump
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DOI：
10.21595/jve.2016.17155
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发表时间：
2017-02
影响因子：
1
通讯作者：
Hou-lin Liu;Kaikai Luo;Xianfang Wu;Huilong Chen;Kai Wang
中科院分区：
文献类型：
--
作者：
Hou-lin Liu;Kaikai Luo;Xianfang Wu;Huilong Chen;Kai Wang
为了研究进口分流器对双吸离心泵压力脉动的影响，设计了无分流器（方案I）、沿流道中心线沿着设置分流器（方案II）和在流道中心线上方设置分流器（方案III）3种方案。利用商业软件FLUENT对泵内流动进行了数值模拟。采用非定常计算方法处理粘性N-S方程，采用滑移网格技术考虑叶轮与蜗壳的相互作用。根据仿真结果，对该泵的水力性能和压力波动进行了详细分析。水力性能与试验结果吻合较好。三种方案下的压力波动是不同的。方案II中的压力波动的最大振幅是最小的。在三种研究方案下，靠近蜗舌的监测点，旋转频率及其谐波占主导地位。三种方案的压力脉动最大值均出现在叶片通过频率处。特别是方案II的最大压力波动幅度小于方案I和方案III，说明在双吸离心泵的吸入口适当设置分流器可以有效降低泵的压力波动峰值。
In order to investigate the effect of inlet splitter on pressure fluctuations in a double-suction centrifugal pump, three research schemes, including no splitter (scheme I), a splitter along the flow passage centerline (scheme II) and a splitter above the flow passage centerline in the suction (scheme III), were designed. The flow in the pump was simulated by commercial code FLUENT. The viscous Navier-Stokes equations were handled with an unsteady calculation and the sliding mesh technique was applied to take into account the impeller-volute interaction. Based on the simulation results, the hydraulic performance and pressure fluctuations were obtained and analyzed in detail. The hydraulic performance agrees well with the experimental results. The pressure fluctuations under three schemes are different. The maximum amplitude of the pressure fluctuations in scheme II is the minimum. For monitoring points near volute tongue, rotating frequency and its harmonies are dominant under three research schemes. The maximum amplitude of pressure fluctuations of three schemes are all at the blade passing frequency. In particular, the maximum pressure fluctuation amplitude of scheme II was less than that of scheme I and scheme III, which illustrated that it is effective to reduce the peak value of pressure fluctuations in double suction centrifugal pump by installing a splitter in the suction properly.