Numerical investigation on multi-stage swirl cooling at mid-chord region of gas turbine blades

doi:10.1016/j.applthermaleng.2022.119003

	Numerical investigation on multi-stage swirl cooling at mid-chord region of gas turbine blades
	Ma, Yongle 1,2,3; Fan XJ(范学军)3,4 ; Huai, Xiulan 1,2,3; Cheng, Keyong 1,2,3
通讯作者	Cheng, Keyong(chengkeyong@iet.cn)
发表期刊	APPLIED THERMAL ENGINEERING
	2022-11-05
卷号	216 页码:11
ISSN	1359-4311
摘要	Compared with the single-stage one, the multi-stage swirl cooling technique has great potential at the mid-chord region of gas turbine blades. Currently, the effect of the chamber structure at the mid-chord region of the blades on the multi-stage swirl cooling is still unknown. In this study, four kinds of the multi-stage swirl chamber models are built: Case 1 has two swirl nozzles and three chambers, and cases 2-4 have six swirl nozzles and seven chambers. Fluid flow and heat transfer characteristics of the coolant in the swirl cooling configurations are numerically investigated. The standard k-epsilon turbulent model is adopted in current study and the Reynolds number of the coolant varies from 12,000 to 52000. The results show that the long swirl chamber in case 1 has negative effect on the performance of the swirl cooling this is because the swirl velocity along the axial direction is gradually reduced and the Nusselt number is decreased remarkably. For cases 2-4, the chambers are separated into several short ones. Therefore, the swirl velocity could keep high value and so is the Nusselt number. Although more swirl chambers could lead to higher pressure loss coefficient, cases 2-4 show better comprehensive thermal performance as compared to case 1. Among the current cases, the swirl chamber structure in case 4 shows the highest cooling effectiveness and obtains more uniform temperature distributions on the external surface of the blade.
关键词	Gas turbine blades Swirl cooling Multi -stage chamber Flow and heat transfer Numerical simulation
DOI	10.1016/j.applthermaleng.2022.119003
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000847999100002
关键词[WOS]	HEAT-TRANSFER ; FLOW ; PERFORMANCE
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
资助项目	Na- tional Science and Technology Major Project[2017 -III -0003- 0027]
项目资助者	Na- tional Science and Technology Major Project
论文分区	一类
力学所作者排名	2
RpAuthor	Cheng, Keyong
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90001
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China; 2.Nanjing Inst Future Energy Syst, Nanjing 210000, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Ma, Yongle,Fan XJ,Huai, Xiulan,et al. Numerical investigation on multi-stage swirl cooling at mid-chord region of gas turbine blades[J]. APPLIED THERMAL ENGINEERING,2022,216:11.
APA	Ma, Yongle,范学军,Huai, Xiulan,&Cheng, Keyong.(2022).Numerical investigation on multi-stage swirl cooling at mid-chord region of gas turbine blades.APPLIED THERMAL ENGINEERING,216,11.
MLA	Ma, Yongle,et al."Numerical investigation on multi-stage swirl cooling at mid-chord region of gas turbine blades".APPLIED THERMAL ENGINEERING 216(2022):11.

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