基于任意回转流面造型方法的离心压缩机全三维叶片设计

3D Blade Design of Centrifugal Compressor Based on Arbitrary Rotary Flow Surfaces

本文提出一套适用于任意旋转叶轮机械叶片的全三维造型方法。该方法在任意子午流线回转流面上进行任意中弧线设计,叠加厚度分布后得到初步叶型型面;然后通过绕流方法计算出叶片型面吸力面和压力面的表面速度分布,得到各回转面上的较优叶型型面;之后通过引入微分几何中的康斯曲面模型对叶片任意三维曲面进行数学解析描述,并对叶型型面进行全曲率检查和曲面光顺,保证型面光滑,并进行CFD性能模拟。

A set of full three-dimensional modeling methods were developed for the arbitrary rotary turbomachinery blades.The method allows for the design of arbitrary camber line directly on any meridian streamline rotating flow surface.The initial blade profile is obtained by superimposing the thickness distribution,and the distribution law of parameters such as the velocity of suction surface and pressure surface of blade profile is calculated by the blade flow around method.The optimal blade profile on each rotating flow surface is obtained by iterative calculation.By introducing Coons surface model in the differential geometry,mathematically described the arbitrary three-dimensional surface of the blades,and checked the full curvature of the blade profile and smoothed the surface.CFD is carried on to provide the performance calculation and flow field simulation.