超声速风扇叶型设计研究

为了设计低流动损失超声风扇叶型,研制出基于数值最优化超声叶型设计软件.以叶型主要几何参数为叶型设计参数,针对轴向进气第一级风扇转子采用给定轮缘功、损失最小为目标函数.设计的优化叶型后面大部分呈平直因此气流转角小、减速增压完全通过激波实现.沿弦向叶片厚度逐渐增加使叶栅通道呈收缩,总体上使流过叶栅超声气流得到减速增压.优化叶型所构成叶栅流场具有多道激波、流动损失低.设计结果表明设计方法的可行性,并可为超声风扇叶型设计提供新思路. 

Design research of supersonic fan blade profile

To design low-flow loss supersonic fan blades,a design software of the blades was developed based on numerical optimization method.The blade main geometrical parameters were selected as blade design parameters.For the first stage of fan of inlet flow in axial direction,the objective function was set as minimum flow loss at given specific work.The optimal blades thickness increase along blade chord direction,so the cascade passage is contractive;in general,it results in the decrease of speed and increase of ...