Large Eddy Simulation of Unsteady Flow in a Mixed flow Pump Guide Vane

doi:10.4028/www.scientific.net/AMM.0.555

	Large Eddy Simulation of Unsteady Flow in a Mixed flow Pump Guide Vane
	Li, Yibin; Li, Rennian; Wang, Xiuyong
	2014
关键词	Mixed-flow pump guide vane pressure fluctuation vortex LES CFD
卷号	444-445
DOI	10.4028/www.scientific.net/AMM.0.555
页码	555-560
英文摘要	In order to investigate the characteristics of unsteady flow in a mixed flow pump guide vane under the small flow conditions, several indicator points in a mixed flow pump guide vane was set, the three-dimensional unsteady turbulence numerical value of the mixed flow pump which is in the whole flow field will be calculated by means of the large eddy simulation (LES), sub-grid scale model and sliding mesh technology. The experimental results suggest that the large eddy simulation can estimate the positive slope characteristic of head & capacity curve. And the calculation results show that the pressure fluctuation coefficients of the middle section in guide vane inlet will decrease firstly and then increase. In guide vane outlet, the pressure fluctuation coefficients of section will be approximately axially symmetrical distribution. The pressure fluctuation minimum of section in guide vane inlet is above the middle location of the guide vane suction surface, and the pressure fluctuation minimum of section in which located the middle and outlet of guide vane. When it is under the small flow operating condition, the eddy scale of guide vane is larger, and the pressure fluctuation of the channel in guide vane being cyclical fluctuations obviously which leads to the area of eddy expanding to the whole channel from the suction side. The middle of the guide vane suction surface of the minimum amplitude pressure fluctuation to which the vortex core of eddy scale whose direction of fluid's rotation is the same to impeller in the guide vane adhere.
会议录	ADVANCES IN COMPUTATIONAL MODELING AND SIMULATION, PTS 1 AND 2
会议录出版者	TRANS TECH PUBLICATIONS LTD
会议录出版地	LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
语种	英语
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS记录号	WOS:000338974900096
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/36697]
专题	能源与动力工程学院
通讯作者	Li, Yibin
作者单位	Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Li, Yibin,Li, Rennian,Wang, Xiuyong. Large Eddy Simulation of Unsteady Flow in a Mixed flow Pump Guide Vane[C]. 见:.