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

文献类型：期刊论文

作者Ma, Yongle2,3,4; Fan XJ(范学军)1,2; Huai, Xiulan2,3,4; Cheng, Keyong2,3,4
刊名APPLIED THERMAL ENGINEERING
出版日期2022-11-05
卷号216页码:11
ISSN号1359-4311
关键词Gas turbine blades Swirl cooling Multi -stage chamber Flow and heat transfer Numerical simulation
DOI10.1016/j.applthermaleng.2022.119003
通讯作者Cheng, Keyong(chengkeyong@iet.cn)
英文摘要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.
分类号一类
WOS关键词HEAT-TRANSFER ; FLOW ; PERFORMANCE
资助项目Na- tional Science and Technology Major Project[2017 -III -0003- 0027]
WOS研究方向Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
语种英语
WOS记录号WOS:000847999100002
资助机构Na- tional Science and Technology Major Project
其他责任者Cheng, Keyong
源URL[http://dspace.imech.ac.cn/handle/311007/90000]  
专题力学研究所_高温气体动力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China;
3.Nanjing Inst Future Energy Syst, Nanjing 210000, Peoples R China;
4.Chinese Acad Sci, Inst Engn Thermophys, 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.

入库方式： OAI收割

来源：力学研究所

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