Analysis of Vortex Evolution in the Runner Area of Water Pump Turbine under Runaway Conditions

doi:10.3390/pr11072080

IR > 新能源学院

	Analysis of Vortex Evolution in the Runner Area of Water Pump Turbine under Runaway Conditions
	Zhou, Feng 1,2; Li, Qifei2 ; Xin, Lu 2
	2023-07
发表期刊	PROCESSES
ISSN	2227-9717
卷号	11 期号:7
摘要	In order to study the evolution principle of the coherent structure in the low flow rate runaway condition, the pump turbine of a certain pumped storage power plant was employed. The transient dynamic stress of the runner was numerically simulated and examined in this study in order to analyze the coherent structure of the vortex and the stability of the grid connection during the transition process. Based on the realizable k-& epsilon; turbulent model, the unsteady flow of the whole pump turbine channels was calculated. The results show that the flow in the runner channels presents with a turbulence state, and with many different scales vortices. These vortex structures are mainly distributed in the inlet region of the blade, the area of the blade trailing edge and the middle section of the runner channels. These vortex structures affect the distribution of the blade pressure load. Moreover, the vortex structure at the inlet of the runner depends on the change in the attack angle. In the flow region formed at the outlet of the blade near the suction surface and the runner cone, the blade has a limited effect on the fluid; thus, the vortex structure depends on the Coriolis force and the centrifugal force joint action. The evolution of these vortex structures will have a greater impact on the grid connection of the power station. During the operation of the power station, it is necessary to reduce the time of transitional conditions so that the power station can operate efficiently.
关键词	pump turbine runaway condition coherent structure channel vortices numerical simulation
DOI	10.3390/pr11072080
收录类别	SCIE
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
WOS记录号	WOS:001039854600001
出版者	MDPI
原始文献类型	Article
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/166146
专题	新能源学院
通讯作者	Li, Qifei
作者单位	1.Key Lab Solar Power Syst Engn, Jiuquan 735000, Peoples R China; 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China
第一作者单位	能源与动力工程学院
通讯作者单位	能源与动力工程学院
推荐引用方式 GB/T 7714	Zhou, Feng,Li, Qifei,Xin, Lu. Analysis of Vortex Evolution in the Runner Area of Water Pump Turbine under Runaway Conditions[J]. PROCESSES,2023,11(7).
APA	Zhou, Feng,Li, Qifei,&Xin, Lu.(2023).Analysis of Vortex Evolution in the Runner Area of Water Pump Turbine under Runaway Conditions.PROCESSES,11(7).
MLA	Zhou, Feng,et al."Analysis of Vortex Evolution in the Runner Area of Water Pump Turbine under Runaway Conditions".PROCESSES 11.7(2023).