采用响应面法的透平冷却通道连接桥宽度和角度结构优化

To meet the requirements of efficient heat transfer and low flow resistance in the cooling channels of the new generation of gas turbines, this study proposes a solution involving the construction of three bridges with varying dimensions within a U-shaped channel. This approach aims to mitigate the excessive pressure drop in the turn region and the uneven heat transfer distribution in the vertical regions. First, a U-shaped channel with adjustable bridge dimensions and angles is constructed. Unstructured meshes are generated using ANSYS Meshing, and computations are performed with CFX. Initial sample data are generated using the central composite design method, followed by the integration of response surface method and multi-objective genetic algorithms to address complex engineering optimization problems.The effects of bridge dimensions and angles on flow and heat transfer performance are analyzed.Through a comprehensive evaluation of multiple candidate solutions,this study presents an optimized design recommendation.The results indicate that the optimized channel exhibits a more uniform flow field distribution,and the presence of the bridges mitigates the uneven heat transfer between the leading and trailing surfaces caused by Coriolis forces under rotating conditions.Although the heat transfer intensity is slightly reduced,the flow resistance of the channel decreases by 62.09% and 56.26% under stationary and rotating conditions,respectively.This structure can reduce local temperature spikes and lower flow resistance,thereby improving cooling efficiency and enhancing the safety and reliability of high-pressure turbines.The study provides valuable data references for the development of mid-chord cooling technologies in turbine blades with high efficiency and low resistance.