基于小生境遗传算法的压气机叶型局部优化

摘要

Niche genetic algorithm was used for partial-shape optimization of compressor blade. In the optimization process, original blade profile was parameterized by NURBS technology. The parameterized blade profile can be partial modiifed by adjustomg the control points of camber line and thickness curves, allows the optimization algorithm search in preset range. The calculation results of optimized blade show that, the Ma distribution of optimized blad proifle eliminates the local peak and is more reasonable, this method achieves expected optimization objective.%利用小生境遗传算法对压气机叶型进行局部优化。利用NURBS技术对需优化叶型进行参数化处理，参数化后的叶型可以对中弧线和厚度分布进行调整，以达到修形的目的，使优化算法可以在预定范围内进行寻优。优化结果表明，优化后的叶型表面马赫数分布消除了局部尖峰，更为合理，达到了预期的优化目的。