Numerical investigation on multi-stage swirl cooling at mid-chord region of gas turbine blades | |
Ma, Yongle1,2,3; Fan XJ(范学军)3,4; Huai, Xiulan1,2,3; Cheng, Keyong1,2,3 | |
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 | |
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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