Research on High-speed Water Ring in Bladeless Zone under Runaway Condition

doi:10.6041/j.issn.1000-1298.2019.05.018

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	Research on High-speed Water Ring in Bladeless Zone under Runaway Condition
	Li, Qifei 1,2; Zhao, Chaoben 2; Quan, Hui 1,2; Long, Shican 2; Wei, Xianzhu 3
刊名	Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
	2019-05-25
卷号	50 期号:5 页码:159-166
关键词	Angle of attack Computer simulation Hydraulic turbines Numerical models Pumped storage power plants Pumps Vortex flow Formation mechanism High speed water K-epsilon turbulent model Large angle of attacks Pump-turbines Pumped storage power station Random fluctuation Runaway conditions
ISSN号	10001298
DOI	10.6041/j.issn.1000-1298.2019.05.018
英文摘要	Aiming to investigate the formation mechanism of high-speed water ring in the vaneless region and the effect on the stable operation of the unit under the runaway condition, the pump-turbine of one certain pumped storage power station was employed. Based on realizable k-Ε turbulent model, the unsteady flow of the whole passage of pump-turbine was calculated. Some parameters such as the speed of the high-speed water ring were studied in bladeless zone. And comparing the numerical simulation results with the test, the results showed that there was an intrinsic connection between the S-shaped curve of the pump turbine and the stability of runaway operating. The value of fluid velocity in the bladeless zone was larger under the runaway condition. High-speed water ring in the bladeless zone under runaway conditions led to instability of running under the runaway condition, the high-speed water ring became more obvious with the decrease of the opening. Under small flow conditions, due to the large angle of attack between the incoming flow direction and the blade bone line, the vortex structure of the runner blade ends was regularly developed, and the angle of attack was increased with the flow variation. Vortex evolution was random and vortex evolution affected the change of blade angle of attack. The angle of attack varied greatly over time and there was great randomness. High-speed water rings were responsible for this random fluctuation. © 2019, Chinese Society of Agricultural Machinery. All right reserved.
语种	中文
出版者	Chinese Society of Agricultural Machinery
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150602]
专题	新能源学院能源与动力工程学院
作者单位	1.Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou; 730050, China; 2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Harbin Institute of Large Electric Machinery, Harbin; 150040, China
推荐引用方式 GB/T 7714	Li, Qifei,Zhao, Chaoben,Quan, Hui,et al. Research on High-speed Water Ring in Bladeless Zone under Runaway Condition[J]. Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery,2019,50(5):159-166.
APA	Li, Qifei,Zhao, Chaoben,Quan, Hui,Long, Shican,&Wei, Xianzhu.(2019).Research on High-speed Water Ring in Bladeless Zone under Runaway Condition.Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery,50(5),159-166.
MLA	Li, Qifei,et al."Research on High-speed Water Ring in Bladeless Zone under Runaway Condition".Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 50.5(2019):159-166.