STUDY ON INFLUENCE OF CIRCULAR RADIUS OF GUIDE VANE HEAD ON RUNAWAY CHARACTERISTICS OF PUMP-TURBINE

doi:10.19912/j.0254-0096.tynxb.2021-0873

IR > 新能源学院

	STUDY ON INFLUENCE OF CIRCULAR RADIUS OF GUIDE VANE HEAD ON RUNAWAY CHARACTERISTICS OF PUMP-TURBINE
	Li, Qifei1,2 ; Ma, Qinzhen 1; Zheng, Fei 1; Xie, Gengda 1; Liu, Siqi 1
	2023-01
发表期刊	Taiyangneng Xuebao/Acta Energiae Solaris Sinica
ISSN	0254-0096
卷号	44 期号:1 页码:435-441
摘要	Based on the Realizable k-Ε turbulence modeltaking the pump-turbine of a domestic pumped storage power station as the research objectthis paper improves the circular radius r of the guide vane head and analyzes the runaway characteristics of the pump-turbine with the improved circular radius of the guide vane headgiving full play to the core role of pump-turbine in pumped storage. The results show that reducing the head circular radius r tor-0.313mm has a better effect on the "S" characteristics of the pump-turbine. The high-speed water ring in the vaneless area is weakened obviously under the runaway condition. When the fluid enters the runner blade channel from the guide vanethe velocity of the fluid increases gradually near the outlet of the guide vane and reaches the maximum in the vaneless area due to the influence of the high-speed water ring. Then the velocity decreases gradually and enters the runner and keeps flowing at a high speed. In the runaway conditionthe vortex at the inlet of the runner blade of the 1-5 runners is gradually flattened along the runner and spreads back to the runner blades. The pressure change near the vortex at the inlet of the runner blade has a overall downward trend and a peak appears at the inlet of the runner blade. The pressure near the vortex at the inlet of the runner blade varies with the displacement and strength of the vortex. A large number of vortexes are distributed in the straight conical section of the draft tube under the runaway conditionand the vortexes move gradually to the diffusion section along the elbow section. The backflow is mainly concentrated near the side wall of the diffusion section of the draft tube. When 300-500 mm away from the central axis of the runnerthe backflow gradually decreases. © 2023 Science Press. All rights reserved.
关键词	Diffusion in liquids Hydraulic motors Hydraulic turbines Pumped storage power plants Pumps Turbulence models Back flow Draft tubes Guide-vane High speed water High-speed water ring Pump-turbines Pumped Storage Runaway characteristic Runaway conditions Vaneless
DOI	10.19912/j.0254-0096.tynxb.2021-0873
收录类别	EI
语种	中文
出版者	Science Press
EI入藏号	20231313817808
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/161654
专题	新能源学院
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou; 730050, China
第一作者单位	新能源学院
第一作者的第一单位	新能源学院
推荐引用方式 GB/T 7714	Li, Qifei,Ma, Qinzhen,Zheng, Fei,et al. STUDY ON INFLUENCE OF CIRCULAR RADIUS OF GUIDE VANE HEAD ON RUNAWAY CHARACTERISTICS OF PUMP-TURBINE[J]. Taiyangneng Xuebao/Acta Energiae Solaris Sinica,2023,44(1):435-441.
APA	Li, Qifei,Ma, Qinzhen,Zheng, Fei,Xie, Gengda,&Liu, Siqi.(2023).STUDY ON INFLUENCE OF CIRCULAR RADIUS OF GUIDE VANE HEAD ON RUNAWAY CHARACTERISTICS OF PUMP-TURBINE.Taiyangneng Xuebao/Acta Energiae Solaris Sinica,44(1),435-441.
MLA	Li, Qifei,et al."STUDY ON INFLUENCE OF CIRCULAR RADIUS OF GUIDE VANE HEAD ON RUNAWAY CHARACTERISTICS OF PUMP-TURBINE".Taiyangneng Xuebao/Acta Energiae Solaris Sinica 44.1(2023):435-441.