Based On Field Synergy Theory Of Aero-engine Cooling Structure Heat Transfer Characteristics Of The Numerical Study

The paper reports on a numerical study of the flow and heat transfer of 2D and 3D film cooling and composite cooling of convection-multiple compact hole-film cooling. This study is based on classical theory of heat transfer augment the theory of Field Synergism.Firstly, for the 2D film cooling case, the secondary flow is from a narrow slot. The effect of the injection angles(a) and blowing ratios(M) on the distribution of velocity, temperature and cooling efficiency along the adiabatic wall have been studied. The influences of a and M on cooling efficiency are explained by analyzing synergetic relation of the relevant fields. And then, the similar numerical simulation is carried out on 3D film cooling with a sigle row of discrete holes. In this case the influence of the injection angle a is considered. The synergism of velocity and temperature fields is also discussed. Finally, the paper gives the numerical simulation and analysis of 3D models of composite convection-film cooling of multiple compact holes. In this case the influence factors examined includes the blowing ratio M, the injection angle a and the spacing p between two adjacent holes of the same row and the spacing s between two adjacent rows of holes. By this study the best cooling structure schemes are suggested, which are also proved by the theory of Field Synergism.Based on this paper, the high efficiency and low resistance cooling technique by regulating the synergetic relation of velocity and temperature fields can be developed.