梯形带肋通道内空气流动与换热特性数值研究

摘要

Ribbed disturbed flow cooling is a major method of the internal cooling for the aero-engine turbine blade.By using the air heat coupling numerical simulation method,the computational fluid dynamics software like CFX was taken to analyze the air flow and heat transfer characteristics in the trapezoidal cooling channel and the rectangular cooling channel.In addition,the paper also studied the influence of the Reynolds number(Re=10,000～30,000)and the rib angle(30°,45°,60° and 90°)on the air flow within the trapezoidal ribbed passage and the heat transfer characteristics.%带肋扰流冷却是航空发动机涡轮叶片内部冷却的一种主要冷却方式.采用CFX等计算流体动力学软件,通过气热耦合数值模拟方法,对比分析了梯形冷却通道和矩形冷却通道内空气的流动和换热特性,研究了雷诺数(Re=10 000～30 000)和肋角度(30°、45°、60°和90°)对梯形带肋通道内空气流动及换热特性的影响.