离心风机叶片三维反问题优化设计

基于三维反问题设计方法和CFD技术,结合试验设计方法、响应面方法和模拟退火优化算法,建立了离心风机叶片三维形状的优化设计方法。以叶轮效率为优化目标,以环量分布参数为优化设计变量,进行了离心风机叶片的优化设计,优化设计结果叶轮效率提高了2.2%。根据建立的优化设计变量和叶轮效率之间的响应面函数关系式,分析了不同环量分布参数及参数间交互效应对叶轮效率的影响,结果显示轮毂进口段环量分布对叶轮效率有较大影响;轮缘处的环量分布形式对叶轮效率影响更为显著。

Aerodynamic Optimization Design of Centrifugal Fan Blades Based on 3-D Inverse Design Method

An optimization design method based on 3-D inverse design method and CFD was developed by combining design of experiment method, response surface method and simulated annealing optimization calculation. The method was applied to a centrifugal fan blade design by setting the impeller efficiency and the circulation distribution parameters as the optimization object and the optimization design variables respectively. The efficiency was improved by 2.2% with the optimization method. The effects of the circulation parameters and their interaction effects on the impeller efficiency were analyzed according to the constructed response surface between the design parameters and the impeller efficiency. It is shown that the inlet circulation distribution on the hub plays an important role on the efficiency. Comparing with the hub, the circulation distribution shape on the shroud has more influences on the efficiency.