提高涡轮进口温度是有效提升燃机热效率的重要途径，交叉肋冷却结构因其冷却效率高、冷却气体用量少的特点受到广泛关注。本文按照采用响应面设计方法得到的曲面优化设计方案，对某型涡轮叶片局部交叉肋冷却结构流道进行数值模拟，分析了肋宽与肋间距以及肋片倾斜角度对交叉肋通道换热与流阻特性的影响，结果表明：肋倾角小，肋宽与肋间距之比大，雷诺数小的方案换热能力更强，雷诺数高的方案的阻力损失更大；肋倾角大，肋宽与肋间距之比小，雷诺数小的方案综合换热效果更好。此外，结合响应面方法获得了该局部位置交叉肋的气动和传热性能的预测公式。三组回归预测方程的预测值与数值模拟值的平均误差分别为3.7%、6.5%、4.6%，一定程度上为后续交叉肋结构的优化设计奠定了基础。

It is an important way to effectively improve the thermal efficiency of gas turbine that increasing turbine inlet temperature. Crossribbed cooling structure has received extensive attention due to its high cooling efficiency and low cooling gas consumption. By response surface optimization design method of solution, numerical simulation was carried out on the flow channel of a local crossfin cooling structure of a turbine blade,concerning the ratio of rib width to rib pitch and fin tilt Angle on heat transfer and flow resistance characteristics of cross rib channel were analyzed, The results show that the scheme with small rib dip Angle and large ratio of rib width to rib spacing has stronger heat transfer capacity with small Reynolds number, while the scheme with high Reynolds number has larger drag loss.The scheme with large rib dip Angle, small ratio of rib width to rib spacing and small Reynolds number has better comprehensive heat transfer effect. In addition,the prediction formulas for the aerodynamic and heat transfer performance of the locally positioned cross ribs are obtained by using the response surface method. The average errors,respectively，between the predicted value and the numerical simulation value of the three regression prediction equations are 3.7%,6.5% and 4.6%.To some extent, it laid the foundation for the optimization design of the crossrib structure.

TK124

黑龙江省自然科学基金(LH2020E066)