提出了一种适用于双层壁叶片的冷却设计流程。沿叶片的叶高和流向抽象提取出简单冷却单元，对其建立一维管网模型并进行多次管网计算，得出各个单元最优的冷却结构方案。将设计好的冷却单元映射回实际叶片中，并对叶片建立一维管网模型，经过多次冷却结构调整与计算迭代，得到叶片初步的冷却结构。对该叶片进行三维气热耦合计算，只需要局部冷却结构微调和少量的CFD计算，就可以得出最终的冷却设计方案。最终设计的叶片CFD计算得到的平均温度为1 049 K，总冷气量为0.288 kg/s，与管网计算结果1 059 K和0.337 kg/s相近。该设计流程方法简便，准确性高，人工工作量和仿真计算量小，优于传统的涡轮冷却设计流程。

A cooling design process suitable for doublewall blades is introduced.The simple cooling unit is extracted along the blade height and flow direction,the onedimensional pipe network calculation model is established for it,and the preliminary cooling structure of the whole blade can be obtained after cooling structure adjustment and calculation iteration are carried out for many times.The threedimensional gasthermal coupling calculation for the blade is carried out,and the ultimate cooling design scheme can be obtained only by minor adjustment of local cooling structure and a small amount of CFD calculation.The average temperature calculated by CFD for the finally designed blade is 1 049 K and the total cooling air mass flow is 0.288 kg/s,which is close to the onedimensional pipe network calculation results of 1 059 K and 0.337 kg/s.This design process is simple and convenient with high accuracy,better than traditional turbine cooling design process,which reduces labor workload and simulation calculation amount.

TK124

国家科技重大专项(2017-I-0011-0012)