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| Numerical simulation on pressure pulsation in multistage centrifugal pump under several working conditions |
| HUANG Kaile, YUAN Jianping*, SI Qiaorui, LIN Gang |
| National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract In order to study the characteristics of pressure pulsation and unsteady flow features in multistage centrifugal pumps, a three-stage centrifugal pump model served as flow simulation object. The DES method was used to simulate the unsteady flow in the pump under four working conditions. The reliability of numerical simulation was demonstrated by comparing the predicted performance with the measured characteristic. Thirty-six monitoring points were set up in the impeller, radial diffuser and return channel in each stage. It is shown that the throat of the radial diffuser is subject to a pressure pulsation in low frequency. At different flow rates, the pressure pulsation presents periodicity and the most pulsation intensity occurs in the radial diffuser, but also the amplitude of pressure pulsation increases when the working point deviating from the design flow condition. At different flow rates, the main frequency of pressure pulsation in the radial diffuser is the blade passing frequency of 327 Hz and the peak amplitude at the blade passing frequency multiplied by an integer is attenuated rapidly. The results provide a theoretical reference to revealing pressure pulsation law in multistage centrifugal pumps.
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Received: 21 May 2018
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| [1]丁剑, 刘厚林, 王勇,等. 叶片出口角影响离心泵噪声辐射数值研究[J]. 振动与冲击, 2014, 33(2):122-127. DING Jian, LIU Houlin, WANG Yong, et al. Numerical study on noise radiation of centrifugal pump influenced by blade outlet angle [J]. Journal of vibration and shock, 2014, 33(2): 122-127.(in Chinese)[2]刘厚林,丁剑,谈明高,等. 叶轮出口宽度对离心泵噪声辐射影响的分析与试验[J]. 农业工程学报, 2013,29(16):66-73. LIU Houlin, DING Jian, TAN Minggao, et al. Analysis and experiment on the influe-nce of impeller outlet width on noise radiation of centri-fugal pumps [J]. Transactions of the CSAE, 2013,29(16): 66-73.(in Chinese)[3]马新华,冯琦,蒋小平,等. 多级离心泵内部非定常压力脉动的数值模拟[J]. 排灌机械工程学报, 2016, 34(1): 26-31. MA Xinhua, FENG Qi, JIANG Xiaoping, et al. Numeri-cal simulation of unsteady pressure fluctuations in multistage centrifugal pumps [J].Journal of drainage and irrigation mechanical engineering, 2016, 34(1): 26-31.(in Chinese)[4]魏川, 张楠. 离心泵内部不稳定流场压力脉动特性分析[J]. 中国设备工程, 2018(5):109-110. WEI Chuan, ZHANG Nan. Analysis of pressure fluctuation characteristics of unstable flow field in centrifugal pump[J]. China plant engineering, 2018(5):109-110.(in Chinese)[5]陈金平, 王建国, 卞迎宾. 偏离工况下离心泵的压力脉动和振动分析[J]. 中国高新区, 2018(10):193. CHEN Jinping, WANG Jianguo, BIAN Yingbin. Pressure pulsation and vibration analysis of centrifugal pumps under off-design conditions [J]. Science & technology industry parks, 2018(10):193.(in Chinese)[6]袁建平, 侯敬生, 付燕霞,等. 离心泵回流漩涡空化的非定常特性研究[J]. 振动与冲击, 2018, 37(16):24-30. YUAN Jianping, HOU Jingsheng, FU Yanxia, et al. Study on unsteady characteristics of vortex cavitation in centrifugal pump reflux [J]. Journal of vibration and shock, 2018, 37(16):24-30.(in Chinese)[7]惠彪, 许会. 离心泵压力脉动的特性分析与测试[J]. 电子世界, 2018(12):25-26. HUI Biao, XU Hui. Characteristic analysis and test of pressure pulsation of centrifugal pump [J]. Electronics world, 2018(12):25-26.(in Chinese)[8]牟介刚, 刘剑, 郑水华,等. 隔舌对离心泵压力脉动特性及内部流场的影响[J]. 中南大学学报(自然科学版), 2016, 47(12):4090-4098. MOU Jiegang, LIU Jian, ZHENG Shuihua, et al. Effect of tongue isolation on pressure fluctuation characteristics and internal flow field of centrifugal pumps [J]. Journal of Central South University(science and technology), 2016, 47(12): 4090-4098.(in Chinese)[9]CARLETTI E, MICCOLI G, PEDRIELLI F, et al. Vibroacoustic measurements and simulations applied to external gear pumps: an integrated simplified approach[J]. Archives of acoustics, 2016, 41(2):285-296.[10]谢龙汉,赵新宇.ANSYS CFX流体分析及仿真[M].北京:电子工业出版社,2013. |
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