Large eddy simulation of unsteady flow in a mixed flow pump guide vane

doi:10.4028/www.scientific.net/AMM.444-445.555

CORC > 兰州理工大学 > 兰州理工大学

	Large eddy simulation of unsteady flow in a mixed flow pump guide vane
	Li, Yi Bin; Li, Ren Nian; Wang, Xiu Yong
	2014
会议日期	July 17, 2013 - July 19, 2013
会议地点	Kunming, China
关键词	Computational fluid dynamics Computer simulation Unsteady flow Vortex flow Amplitude pressure fluctuations Guide vane LES Mixed flow pump Operating condition Pressure fluctuation Sub-grid scale models Three-dimensional unsteady turbulences
卷号	444-445
DOI	10.4028/www.scientific.net/AMM.444-445.555
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. © (2014) Trans Tech Publications, Switzerland.
会议录	Applied Mechanics and Materials
会议录出版者	Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland
语种	英语
ISSN号	16609336
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/117468]
专题	兰州理工大学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, No.287 Langongping Road, Lanzhou, 730050, China
推荐引用方式 GB/T 7714	Li, Yi Bin,Li, Ren Nian,Wang, Xiu Yong. Large eddy simulation of unsteady flow in a mixed flow pump guide vane[C]. 见:. Kunming, China. July 17, 2013 - July 19, 2013.