3D Start-up Transition Process of Full Flow System for Shaft-extention Tubular Pump Station

被引：0

作者：

Xu H. ^{[1
]}

Gong Y. ^{[1
]}

Cao C. ^{[2
]}

Chen H. ^{[1
]}

Kan K. ^{[3
]}

Feng J. ^{[1
]}

机构：

[1] College of Agricultural Science and Engineering, Hohai University, Nanjing

[2] Power China Huadong Engineering Co., Ltd., Hangzhou

[3] College of Energy and Electrical Engineering, Hohai University, Nanjing

来源：

Kan, Kan (kankan@hhu.edu.cn) | 1600年 / Chinese Society of Agricultural Machinery卷 / 52期

关键词：

Additional slap doors; Shaft-extension tubular pump; Start-up process; Three-dimensional numerical simulation;

D O I：

10.6041/j.issn.1000-1298.2021.04.015

中图分类号：

学科分类号：

摘要：

In order to analyze the transient characteristics of tubular pump during non-regulative operating condition, a shaft-extension tubular pump with rapid-drop gate and slap doors attached was established, and a 3D numerical simulation for start-up process was investigated numerically. The rational speed was deduced by utilizing the moment balance equation. The movement of the gate with additional slap doors was specified based on the laying mesh and dynamic mesh technology. The simulation results showed good agreements with the test results. The result showed that the starting speed and the change of flow rate had obvious influence on the pressure gradient in the impeller section. The pump head was increased firstly and then decreased to the rated head during the start-up process. The maximum start head was 6.38 m at the time of 2.25 s, and the maximum pressure difference between front and rear of the slap door was 2.61 m. As a result, the outlet gate with additional slap doors could effectively reduce the maximum start head and improve the safety factor of the pump unit. Meanwhile, the additional slap doors on the gate played a good role in the shunt during the start-up process, which can avoid the system instability caused by excessive water pressure in the outlet passage when the impeller speed rose fast and the gate was not fully opened. © 2021, Chinese Society of Agricultural Machinery. All right reserved.

引用

页码：143 / 151

页数：8

共 28 条

[11] XIA Hepeng, Study on transition process of starting and stopping of vertical shaft cross-flow pump system, (2019)
[12] XU Jianye, ZHANG Haisheng, LIU Yuefei, Et al., Numerical simulation of runaway accident characteristics of the axial pump unit in Datao NO.1 Station, China Rural Water and Hydropower, 6, pp. 173-176, (2017)
[13] WU D, WU P, LI Z, Et al., The transient flow in a centrifugal pump during the discharge valve rapid opening process, Nuclear Engineering and Design, 240, 12, pp. 4061-4068, (2010)
[14] LI Z F, WU P, WU D Z, Et al., Experimental and numerical study of transient flow in a centrifugal pump during startup, Journal of Mechanical Science and Techonoly, 25, 3, pp. 749-757, (2011)
[15] HU F F, MA X D, WU D Z, Et al., Transient internal characteristics study of a centrifugal pump during startup process, 26th IAHR Symposium on Hydraulic Machinery and Systems. IOP Conf. Series: Earth and Environmental Science, pp. 989-995, (2012)
[16] ZHOU Daqing, LIU Yuefei, Numerical simulation of axial pump unit startup process using VOF model, Journal of Drainage and Irrigation Machinery Engineering, 34, 4, pp. 307-312, (2016)
[17] ZHOU Daqing, JIANG Shengwen, CHEN Huixiang, Numerical simulation of start-up process of mixed flow pump unit combined with hydraulic control butterfly valve action, Journal of Drainage and Irrigation Machinery Engineering, 37, 2, pp. 112-117, (2019)
[18] LI Wenfeng, FENG Jianjun, LUO Xingqi, Et al., Numerical simulation of transient flows in Francis turbine runner based on dynamic mesh method, Journal of Hydroelectric Engineering, 34, 7, pp. 64-73, (2015)
[19] XU Zhe, ZHENG Yuan, KAN Kan, Et al., Accelerated starting transition process of rapid gate in large tubular pumping station, Journal of Drainage and Irrigation Machinery Engineering, 38, 10, pp. 1016-1022, (2020)
[20] LU Weigang, GUO Xingming, ZHOU Xiucai, Et al., Theoretical study on stop gate breaking flow in large pumping station, Transactions of the Chinese Society for Agricultural Machinery, 36, 4, pp. 56-59, (2005)

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