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| Transient flow characteristics and pressure pulsation characteristics at splitter of double-volute centrifugal pump during startup |
| 1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Energy and Power Enginee-ring, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract To investigate the transient flow characteristics of the liquid inside volute and the pressure pulsation characteristics at the splitter during startup process of double-volute centrifugal pump, a double-volute centrifugal pump with specific speed of 90 was used as research object, and a set of circulating pipeline system was established. According to RNG k-ε turbulence model, ANSYS CFX software was used to simulate the three-dimensional unsteady state of double-volute centrifugal pump and circulating pipeline system. The evolution law of flow field and the variation tendency of hydraulic characteristics during startup process were analyzed, and the changes of pressure pulsation at different splitter positions were compared. The results show that at the beginning of startup, the flow velocity inside volute changes sharply, and the high-speed regions appear at the tongue and the initial position of splitter. There is an obvious velocity gradient at the entrance of volute. With the increasing of rotate speed, the high-speed regions are gradually decreased, and the internal flow tends to be stable. During the startup process, the pressure pulsation amplitudes at the initial position and the end position of splitter are relatively large, and the pressure pulsation on the outer side of splitter is more stable than that on the inner side of splitter.
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Received: 07 January 2020
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| ［1］ |
杨敏, 闵思明, 王福军. 双蜗壳泵压力脉动特性及叶轮径向力数值模拟\[J\]. 农业机械学报, 2009, 40(11): 83-88.
|
|
YANG M, MIN S M, WANG F J. Numerical simulation of pressure fluctuation and radial force in a double volute pump\[J\]. Transactions of the Chinese Society for Agricultural Machinery, 2009, 40(11): 83-88. (in Chinese)
|
| ［2］ |
张霞,袁寿其,张金凤,等.螺旋形蜗壳型式对高比转数离心泵性能的影响\[J\].排灌机械工程学报,2017,35(1): 25-31.
|
|
ZHANG X, YUAN S Q, ZHANG J F, et al. Effects of spiral volute type on performance of high specific speed centrifugal pump
|
| \[J\] |
Journal of Drainage and Irrigation Machinery Engineering, 2017,35(1): 25-31. (in Chinese)
|
| ［3］ |
赵万勇,陈帅,赵强,等.蜗壳断面面积变化规律对双吸离心泵水力性能的影响\[J\].排灌机械工程学报,2020,38(9):871-877.
|
|
ZHAO W Y, CHEN S, ZHAO Q, et al. Influence of volute cross-sectional area profile on hydraulic perfor-mance of double-suction centrifugal pump \[J\]. Journal of Drainage and Irrigation Machinery Engineering, 2020,38(9):871-877. (in Chinese)
|
| ［4］ |
CUI B L, LI X D, RAO K, et al. Analysis of unsteady radial forces of multistage centrifugal pump with double volute\[J\]. Engineering Computations, 2018,35(3): 1500-1511.
|
| ［5］ |
KHALIFA A E, AL-QUTUB A M, BEN-MANSOUR R. Study of pressure fluctuations and induced vibration at blade-passing frequencies of a double volute pump\[J\]. Arabian Journal for Science and Engineering, 2011, 36(7): 1333-1345.
|
| ［6］ |
THANAPANDI P, PRASAD R. Centrifugal pump transient characteristics and analysis using the method of characteristics\[J\]. International Journal of Mechanical Sciences, 1995, 37(1): 77-89.
|
| ［7］ |
LI W, JI L L, SHI W D, et al. Fluid-structure interaction study of a mixed-flow pump impeller during startup\[J\]. Engineering Computations, 2018, 35(1): 18-34.
|
| ［8］ |
李志峰,吴大转,王乐勤,等.离心泵启动过程瞬态特性的试验\[J\].排灌机械工程学报,2010,28(5):389-393.
|
|
LI Z F, WU D Z, WANG L Q, et al. Experiment on instantaneous characteristics in centrifugal pump during startup period \[J\]. Journal of Drainage and Irrigation Machinery Engineering, 2010,28(5):389-393.(in Chinese)
|
| ［9］ |
张玉良. 离心泵启动过程的瞬态内流和外特性\[D\].杭州：浙江大学, 2013.
|
| ［10］ |
吴绍科,张跃文,张鹏.离心泵瞬时启动过程的仿真\[J\].排灌机械工程学报,2018,36(6):461-465.
|
|
WU S K, ZHANG Y W, ZHANG P. Simulation on performance of centrifugal pump during rapid startup period \[J\]. Journal of Drainage and Irrigation Machinery Engineering, 2018,36(6):461-465. (in Chinese)
|
| ［11］ |
陈宗贺,施卫东,张德胜,等.混流泵启动过程空化特性的试验研究\[J\].排灌机械工程学报,2019,37(9):758-762.
|
|
CHEN Z H, SHI W D, ZHANG D S, et al. Experimental study on cavitation characteristics of mixed-flow pump during startup \[J\]. Journal of Drainage and Irrigation Machinery Engineering, 2019,37(9):758-762. (in Chinese)
|
| ［12］ |
HU F F, MA X D, WU D Z, et al. Transient internal characteristic study of a centrifugal pump during startup process\[C\]∥Proceedings of the 26th IAHR Symposium on Hydraulic Machinery and Systems, 2012: 989-995.
|
| ［13］ |
TSUKAMOTO H, OHASHI H. Transient characteristics of a centrifugal pump during startup period \[J\]. Journal of Fluids Engineering, 1982, 104(1): 6-13.
|
|
|
|
2021, Vol. 42 
