Unsteady analysis of effect on hydraulic turbine under variable gas content

doi:10.13224/j.cnki.jasp.2017.09.027

	Unsteady analysis of effect on hydraulic turbine under variable gas content
	Shi, Fengxia; Yang, Junhu; Wang, Xiaohui
刊名	Hangkong Dongli Xuebao/Journal of Aerospace Power
	2017-09-01
卷号	32 期号:9 页码:2265-2272
关键词	Computational fluid dynamics Flow measurement Hydraulic motors Hydraulic turbines Impellers Pressure effects CFD technologies Distribution of gas Gas content Pressure fluctuation Rotation frequencies Two phase Unsteady Unsteady analysis
ISSN号	10008055
DOI	10.13224/j.cnki.jasp.2017.09.027
英文摘要	In order to study the effect of gas content on the internal pressure in hydraulic turbine, CFD technology was used to simulate the flow field in a pump with the specific speed of 84.5 as turbine, the distribution of gas and the effect of gas content on pressure fluctuation in hydraulic turbine were clarified. Results showed that from volume inlet to impeller outlet, the gas content increased gradually, when the gas content was equal to 0.2, the gas distribution was not uniform, and in volume outlet and impeller inlet the wake effect was obvious. The gas gathered in impeller outlet, the higher gas rate indicated the more obvious gathering phenomenon. The influence of gas content on the distribution of relative pressure was obvious, the relative pressure of each point in hydraulic turbine decreased with the increase in gas rate. The gas content had little effect on the pressure fluctuation amplitude of the monitored point at the main frequency when the inlet gas content was less than 0.05, but when the inlet gas content was greater than 0.05, the effect was obvious. The bigger gas content meant the smaller pressure fluctuation frequency amplitude. In different gas content the main frequencies of pressure fluctuation in turbine volute and impeller were equal to the rotation frequency of the impeller blades. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.
语种	中文
出版者	BUAA Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114398]
专题	能源与动力工程学院新能源学院
作者单位	School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Shi, Fengxia,Yang, Junhu,Wang, Xiaohui. Unsteady analysis of effect on hydraulic turbine under variable gas content[J]. Hangkong Dongli Xuebao/Journal of Aerospace Power,2017,32(9):2265-2272.
APA	Shi, Fengxia,Yang, Junhu,&Wang, Xiaohui.(2017).Unsteady analysis of effect on hydraulic turbine under variable gas content.Hangkong Dongli Xuebao/Journal of Aerospace Power,32(9),2265-2272.
MLA	Shi, Fengxia,et al."Unsteady analysis of effect on hydraulic turbine under variable gas content".Hangkong Dongli Xuebao/Journal of Aerospace Power 32.9(2017):2265-2272.