Numerical Study On Flow And Heat Transfer Characteristics Of Impingment/Effusion Cooling Mode

A numerical study is reported to investigate the flow and temperature fields for jet array impingement cooling, inclined multi-hole film cooling and impingement/effusion film cooling. The effects of the flow and the geometric parameters on the flow and heat transfer characteristic are analyzed extensively.Firstly, for jet array impingement cooling, the effects of the distance of adjacent holes, the impinging distance and jet Reynolds number on heat transfer characteristic at the target wall are summarized under staggered holes arrangement and the same hole diameter. And then, the numerical simulation of inclined multi-hole film cooling has been studied. The influence factors examined in this case include blowing ratio and the distance of adjacent holes. Finally, the paper gives the numerical simulation of impingement/effusion film cooling. The numerical simulations are conducted for different blowing ratios and different distances of adjacent holes. The cooling configuration is optimized on the basis of the results.The purpose of this paper is to make extensive study on the essence of impingement/ effusion film cooling, and the research results will be applied in futural study on the higher performance aeroengine.