Improvement on shaped-hole film cooling effectiveness by integrating upstream sand-dune-shaped ramps

作     者：Shengchang ZHANG Jingzhou ZHANG Xiaoming TAN Shengchang ZHANG;Jingzhou ZHANG;Xiaoming TAN

作者机构：College of Energy and Power EngineeringKey Laboratory of Thermal Management and Energy Utilization of AircraftNanjing University of Aeronautics and AstronauticsNanjing 210016China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第4期

页      面：42-55页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：financial support for this project from the National Natural Science Foundation of China(No.U1508212) National Science and Technology Major Projects(Nos.2017-Ⅲ-0011-0025 and 2017-Ⅲ0011-0037) 

主　　题：Adiabatic film cooling effectiveness Film cooling Numerical simulation Sand-dune-shaped ramp Shaped hole 

摘      要：A numerical investigation and experimental validation is performed to address deeper insights into the combined effect of shaped holes and Sand-Dune-shaped upstream Ramp(SDR)on enhancing the film cooling effectiveness,under a wide blowing ratio range(M=0.25–1.5).Three kinds of holes(Cylindrical Hole(CH),Fan-Shaped Hole(FSH),and Crater-Shaped Hole(CSH))are taken into *** SDR shows an inherent affecting mechanism on the mutual interaction of *** aggravates the lateral spreading of cooling jet and thus improves the film cooling uniformity significantly,regardless of film-hole shape and blowing *** the blowing ratio is beyond 1.0,the combined effect of shaped holes and SDR on improving film cooling effectiveness behaves more *** is suggested that FSH-SDR is a most favorable film cooling *** FSH-SDR case,the spatially-averaged film cooling effectiveness is increased monotonously with the increase of blowing ratio,among the present bowing ratio range.