发动机叶片流道内辐射换热的数值计算

应用贴体坐标系下辐射传递方程的离散坐标法，数值模拟了三维叶片流道内的辐射换热，计算了进口燃气总温分别为1673K和2193K时，发动机叶片流道内燃气对发动机机匣、轮毂和叶片的入射辐射热流密度。数值模拟表明，当进口燃气总温增加29.9%时，入射辐射热流密度将增加188%～212%。与直角坐标系下有限体积法的计算结果比较，二者非常接近。

Numerical computation on blade channel radiation in engine

The discrete ordinates method (DOM) in general body-fittedcoordinates was employed to simulate radiation in three dimensional vane channel of engine,and incident radiant heat fluxes on engine wall and blades was computed and co mpared when total temperature of inlet gas was 1 673 K and 2 193 K respectively. The numerical simulation indicates that incident radiant heat fluxes increase from 188 percent to 212 percent when temperature of inlet gas increase 29.9 percent. The solution from DOM is found to be in good agreement with that from finite vol ume method in a Cartesian coordinate.