Film cooling performance and flow structure of single-hole and double-holes with swirling jet  

作　　者：Rui ZHU Simon TERRENCE Shulei LI Gongnan XIE 

机构地区：[1]School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China [2]Research&Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518057,China [3]Department of Mechanical Engineering,University of Minnesota,Minneapolis,MN 55455,USA [4]School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Chinese Journal of Aeronautics》2022年第3期201-213,共13页中国航空学报（英文版）

基　　金：supported by Guangdong Basic and Applied Basic Research Foundation,China(No.2019A1515111146);the Fundamental Research Funds for the Central Universities,China(No.3102020HHZY030005);the Natural Science Basic Research Plan in Shaanxi Province of China(No.2021JQ-104);the National Natural Science Foundation of China(No.51676163);the National 111 Project,China(No.B18041)。

摘　　要：This paper presents the results of a numerical study of the effects of swirling flow in coolant jets on film cooling performance.Some combined-hole designs with swirling coolant flow entering the delivery hole are proposed and analyzed.Adiabatic film cooling effectiveness values for cases with various blowing ratios are compared.Detailed flow structures and underlying mechanisms are discussed.The results show that film cooling effectiveness is improved with jet swirl at high blowing ratios,and that swirl strength has significant influence on film cooling performance.Combined-hole designs can further improve film cooling performance using swirling jets due to mixing of coolant flows and interaction of vortices.The largest improvements of area-averaged film cooling effectiveness for a single-hole swirl case and a combined-hole swirl case over corresponding non-swirling case results are 157%and 173%,respectively.

关 键 词：Combined-hole Film cooling Interactions of vortices Jet-in-cross-flow Swirling flow 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]