基于控制速度分布的离心鼓风机三维叶片优化设计方法研究

The Study of 3D Optimal Design Method of Centrifugal Blower Impeller Based on Velocity Distribution Control

本文对离心鼓风机三维叶片优化设计进行了研究,采用控制叶轮流道内的相对速度分布的三维叶片优化设计方法,通过控制流道内沿流线方向的相对速度分布,控制叶轮流道内的边界层增长与分离、二次流、分层效应等流动效应。在优化判据方面采用考虑旋转和曲率效应的边界层计算方法,根据不同的相对速度分布计算边界层发展状况作为优化判据。基于MATLAB编写了优化设计程序设计出一种离心鼓风机的三维优化叶片,通过CFD数值模拟分析和对比证明该优化方法实现了优化设计的目的。

A study was conducted on the optimal 3D design method of the centrifugal blower blade is based on controlling the relative velocity distribution in impeller passages. Using this method,many flow effects such as boundary layer increases and the separation, secondary flow and stratification effect were controlled. The calculation results of boundary layer in different relative velocity distribution are taken as the optimization criteria based on the rotation and curvature effect. The optimal design method is programmed in MATLAB and an example of 3D optimal blade is presented, the result of CFD numerical simulation shows that the method is reliable.