Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine

doi:10.3390/app9194137

	Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine
	Chen, Yu 2; Li, Rennian 2,3; Han, Wei 2,3; Guo, Tao 2; Su, Min 1; Wei, Sanze 4
刊名	APPLIED SCIENCES-BASEL
	2019-10-01
卷号	9 期号:19
关键词	sediment erosion solid particle guide vane end-clearance turbulent characteristics
DOI	10.3390/app9194137
英文摘要	Sediment erosion caused by the collision of solid particles is a challenge for the safety, reliability, unit efficiency, and vibration noise of the hydroelectric engineering system located at China's Yellow River and northwest inland basin. The sediment-laden flow of the guide vane end-clearance of the Francis Turbine at Dongshuixia hydroelectric station was used as the research object, and the large eccentric shaft structure of a guide vane was considered. Numerical calculations with the large eddy simulation (LES) and discrete phase models (DPMs) were carried out to study the erosion characteristics and mechanism of the end-surface of the guide vane and head cover, the flow mechanism of adverse erosion behind the shaft, and the influence law of the turbulence integral scale, turbulent kinetic energy, and turbulent flow angle on erosion. The flow field with a 1 mm clearance should set the number of particle trajectory per unit inlet area at about 1/mm(2) to ensure the accuracy of calculation. The von Karman vortex street is the main reason for adverse erosion behind the shaft and the low frequency energy of the turbulence plays a leading role in erosion. The above results provide a reference for the optimization design of an anti-wear guide vane and wear-protection of the clearance with sediment-laden water.
WOS研究方向	Chemistry ; Engineering ; Materials Science ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000496258100195
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155322]
专题	能源与动力工程学院电气工程与信息工程学院
作者单位	1.Lanzhou Univ Technol, Coll Elect & Informat Engn, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China; 3.Key Lab Fluid Machinery & Syst, Lanzhou 730050, Gansu, Peoples R China; 4.Gansu Shengyu Water Conservancy & Hydropower Tech, Lanzhou 730090, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yu,Li, Rennian,Han, Wei,et al. Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine[J]. APPLIED SCIENCES-BASEL,2019,9(19).
APA	Chen, Yu,Li, Rennian,Han, Wei,Guo, Tao,Su, Min,&Wei, Sanze.(2019).Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine.APPLIED SCIENCES-BASEL,9(19).
MLA	Chen, Yu,et al."Sediment Erosion Characteristics and Mechanism on Guide Vane End-Clearance of Hydro Turbine".APPLIED SCIENCES-BASEL 9.19(2019).