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Journal of Drainage and Irrigation Machinery Engin  2019, Vol. 37 Issue (2): 112-117    DOI: 10.3969/j.issn.1674-8530.18.0061
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Numerical simulation of startup process of mixed flow pump unit combined with hydraulic control butterfly valve action
ZHOU Daqing, JIANG Shengwen, CHEN Huixiang
School of Energy and Electrical Engineering, Hohai University, Nanjing, Jiangsu 211100, China
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Abstract  The startup transient characteristics of a mixed flow pump with a hydraulic controlled butterfly was predicted using the unsteady numerical approach based on the method of sliding grid to realize the opening rule of butterfly valve after the establishment of the whole flow system geometrical model of the pump station. Then the external characteristics of the pump unit and static pressure at monitoring points against time as well as the internal flow transient changes were obtained. Numerical results show that the maximum reverse speed of the starting process of the unit is 0.16 times the rated speed, and the highest pressure in the pump outlet is 1.26 times the rated value, and neither of them exceeds the permissible value. When the unit speed shows a stable tendency, the flow characteristics and the pressure gradient change in the pump are mainly affected by the butterfly valve opening. While at the small opening , the pressure gradient in the pump is larger, and the maximum differential pressure reaches 456 m(1.62 times the rated lift). The high pressure water flows through the butterfly valve in the form of the jet and generates a backflow on the outlet side, which results in a drastic fluctuation of the differential pressure on both sides of the butterfly valve and easily induces the vibration of the valve body.
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Articles by authors
ZHOU Da-Qing
JIANG Sheng-Wen
CHEN Hui-Xiang
Key wordshydraulic control butterfly valve   mixed flow pump unit   startup process   threedimensional unsteady numerical simulation   butterfly valve opening     
Received: 2018-03-30;
Cite this article:   
ZHOU Da-Qing,JIANG Sheng-Wen,CHEN Hui-Xiang. Numerical simulation of startup process of mixed flow pump unit combined with hydraulic control butterfly valve action[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(2): 112-117.
 
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[3] ZHOU Daqing, LIU Yuefei. Numerical simulation of axial pump unit startup process using VOF model[J]. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(4): 307-312.
[4] Ren Yan, Zhou Bing, Zheng Yuan, Deng Congxiang. Startup process of pumped-storage units in hybrid power system[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(1): 40-44.
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