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	Influence of Guide Vane Profile Change on Draft Tube Flow Characteristics of Water Pump Turbine
	Li, Qifei2,3; Xin, Lu2; Xie, Gengda2; Liu, Siqi2; Wang, Qifan1
刊名	PROCESSES
	2022-08-01
卷号	10期号:8
关键词	reversible water turbines guide vane profile change draft tube vortex belt pressure pulsation energy recovery factor
DOI	10.3390/pr10081494
英文摘要	In order to study the influence of the change of the guide vane airfoil on the flow characteristics in the draft tube of a reversible hydraulic turbine, a reversible hydraulic turbine was used as the object of study, and the effect of the change on the flow pattern, energy loss, and pressure pulsation in the draft tube area was studied based on the SST k-omega turbulence model. The results show that under low flow conditions, the modified movable guide vane directly affects the direction and speed of water entering the draft tube, reduces the density of vortex in the draft tube area, reduces the impact on the near wall of the draft tube during the rotation of the vortex belt, and improves the stability of the unit operation. The turbulent energy comparison graph shows that the energy loss in the bent elbow section and the diffusion section of the draft tube is reduced, and the energy return coefficient of the draft tube is improved by calculating that the energy recovery level of the draft tube is improved under different operating conditions. A comparative analysis of the pressure pulsation in the draft tube area before and after the modification in combination with the development of the vortex belt shows that the modified movable guide vane effectively reduces the vibration intensity in the draft tube area and improves the stable operation threshold of the unit.
WOS研究方向	Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000845958200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159811]
专题	新能源学院
作者单位	1.Huaneng Gansu Hydropower Dev Co Ltd, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China; 3.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China;
推荐引用方式 GB/T 7714	Li, Qifei,Xin, Lu,Xie, Gengda,et al. Influence of Guide Vane Profile Change on Draft Tube Flow Characteristics of Water Pump Turbine[J]. PROCESSES,2022,10(8).
APA	Li, Qifei,Xin, Lu,Xie, Gengda,Liu, Siqi,&Wang, Qifan.(2022).Influence of Guide Vane Profile Change on Draft Tube Flow Characteristics of Water Pump Turbine.PROCESSES,10(8).
MLA	Li, Qifei,et al."Influence of Guide Vane Profile Change on Draft Tube Flow Characteristics of Water Pump Turbine".PROCESSES 10.8(2022).

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