Heat Transfer and Aerodynamics of Complex Shroud Leakage Flows in a Low-Pressure Turbine

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	Heat Transfer and Aerodynamics of Complex Shroud Leakage Flows in a Low-Pressure Turbine
	Pei, Wang 1,2; Qiang, Du 1; Jie, Yang Xiao 1,2; Qiang, Zhu Jun 1
刊名	JOURNAL OF THERMAL SCIENCE
	2013-09-01
卷号	22 期号:5 页码:447-458
关键词	over-shroud leakage flow inter-shroud leakage flow shrouded LP turbine
英文摘要	A numerical investigation on over-shroud & inter-shroud leakage flow has been carried out to explore the underneath flow physics at the stage of shrouded Low Pressure (LP) turbine. Compared with the No inter-Shroud gap's Leakage flow Model (NSLM) and With inter-Shroud gap's Leakage flow Model (WSLM), the aerodynamic characteristics and the heat transfer performance have been studied. Through the aerodynamic point of view, it is concluded that due to the pressure difference between the rotor's passage and the over-shroud cavity, in the stream-wise direction, flow structure has been modified, and the inter-shroud leakage flow may even cause flow separation in the vicinity of the blade passage's throat. In the circumferential direction, separation flows appear over the rotor's shroud surface (upper platform of the shroud). Meanwhile, from the point of view of heat transfer, further provision on contour maps of the non-dimensional Nusselt number reveals that the reattachment of leakage flow would enhance the heat transfer rates and endanger the rotor's labyrinth fins over the shroud. However, due to the limited amount of inter-shroud leakage flow (current computational model), temperature distribution variation along the blade surface (near the rotor's tip section) seems to have only minor insignificant differences. At the end of the paper, the author puts forward some recommendations for the purpose of future successful turbine design.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Engineering, Mechanical
研究领域[WOS]	Thermodynamics ; Engineering
关键词[WOS]	PROFILE
收录类别	SCI
语种	英语
WOS记录号	WOS:000324082100008
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98888]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Pei, Wang,Qiang, Du,Jie, Yang Xiao,et al. Heat Transfer and Aerodynamics of Complex Shroud Leakage Flows in a Low-Pressure Turbine[J]. JOURNAL OF THERMAL SCIENCE,2013,22(5):447-458.
APA	Pei, Wang,Qiang, Du,Jie, Yang Xiao,&Qiang, Zhu Jun.(2013).Heat Transfer and Aerodynamics of Complex Shroud Leakage Flows in a Low-Pressure Turbine.JOURNAL OF THERMAL SCIENCE,22(5),447-458.
MLA	Pei, Wang,et al."Heat Transfer and Aerodynamics of Complex Shroud Leakage Flows in a Low-Pressure Turbine".JOURNAL OF THERMAL SCIENCE 22.5(2013):447-458.