单级冲动式汽轮机叶片气热耦合数值计算

Coupled Heat Transfer Simulation an Impulse Supersonic Steam Turbine Rotor Blade

本文针对水下特种动力用单级冲动式涡轮机叶片的温度场预测,采用气热耦合方法进行数值计算,并与非耦合方法计算进行了对比分析。结果表明,两种计算方法获得的主流场比较接近,而叶片表面的温度场有较大的区别;耦合计算表明沿轴向方向,从动叶进口到动叶出口,叶片内部温度温差逐渐缩小,在叶片入口处,从叶根到叶顶叶片的温度呈先降低后升高的趋势,在动叶出口处,叶片表面温度值趋于均匀,叶片温度梯度载荷不大。

Temperature field in an impulse supersonic steam turbine blade were numerically investigated by Coupled Heat Transfer Simulation method,and compared with non-coupled heat transfer simulation method.The result show that flow field of the steam turbine is close approximation by the two method,but the temperature on the blade surface is different.By the coupled method along axial direction,from the inlet to the outlet of the blade,difference of the temperature in blade is gradually diminished.At the inlet from hub to shroud,the temperature increments firstly then falls,at the outlet the temperature tend to be uniform,temperature load of the blade is hardly.