Affiliation of Author(s):能源与动力学院
Journal:Tuijin Jishu
Abstract:In order to study the cooling characteristics of film-effusion combination cooling structure, three kinds of test pieces of different effusion cooling holes arrangement but equivalent orifice area were designed. The effects of aerodynamic parameters and geometric parameters on the adiabatic cooling efficiency and the convective heat transfer coefficient were investigated experimentally. The experimental results show that the adiabatic cooling efficiency and convective heat transfer coefficient gradually decrease in the direction of mainstream, and reache the lowest point, then they remain unchanged. The main flow Reynolds number and the blowing ratio have no evident effect on the adiabatic cooling efficiency under research range of parameters, but the effect on convective coefficient is evident, that is increased gradually with the increase of main flow Reynolds number or blowing ratio. For the three test specimens, the adiabatic cooling efficiency and the convective coefficient of the cooling structure of the largest stream wise spacing are the largest, and followed by the cooling structure of medium stream wise spacing, and the minimum is the cooling structure of the minimum stream wise spacing. © 2018, Editorial Department of Journal of Propulsion Technology. All right reserved.
ISSN No.:1001-4055
Translation or Not:no
Date of Publication:2018-08-01
Co-author:Tian, Mei,Feng, Xiao-Xing,Shi, Rui,Deng, Xiang-Yang
Correspondence Author:ywh
Date of Publication:2018-08-01