燃气轮机叶片内部直通道的肋片结构优化

Structural Optimization of Ribbed Straight Passage in Gas Turbine Blades

提出了一种新型燃机透平叶片带肋直通道结构优化策略,采用ANSYS Workbench优化设计平台,应用Kriging代理模型和遗传算法对燃机叶片内宽高比为4、肋片角度为45°的带肋直通道进行了优化计算。结果表明:在带肋直通道切除部分肋片效率为负的肋片的新型结构可实现强化换热且降低流阻;优化后的肋片通道较未优化的通道,换热性能因子提升2. 9%,摩擦因子比降低可达3. 8%;通过寻优计算,获得了宽高比为4,肋片倾斜角度45°燃机叶片内带肋直通道最优结构参数。

A novel ribbed straight channel structure optimization strategy for gas turbine blades is proposed in this paper. It uses ANSYS Workbench optimization design platform,combined with Kriging proxy model and genetic algorithm,to optimize the calculation of ribbed straight channel with gas turbine blade width ratio of 4 and rib angle of 45 degrees. The results demonstrate that the removal of the rib with negative efficiency can significantly reduce the flow resistance of the channel and improve the heat transfer intensity. Compared with the unoptimized channel,the heat transfer performance factor is increased by 2. 9%,and the friction factor ratio is reduced by 3. 8%. Furthermore,the optimal straight channel with a fin of width to height ratio of 4 and a tilt angle of 45 degrees has been obtained through the presented optimization calculation.