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本文介绍双排叉排孔气膜冷却绝热有效温比η的测量结果和数值计算。根据η沿主流和横向的变化 ,特别是在近孔区的分布规律分析了前后排孔二次射流的不同流动特点。数值计算采用求解椭圆方程的三维差分程序 ,吹风比 M等于 0 .6。
This paper introduces the measurement results and numerical calculation of the effective temperature ratio η of double-row cross-hole air-film cooling adiabatic cooling. According to the variation of η along the mainstream and the transverse direction, especially in the near-borehole area, the different flow characteristics of the front and rear row of secondary jets are analyzed. The numerical calculation uses the three-dimensional difference program to solve the elliptic equation, and the blowing ratio M is equal to 0.6.