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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.
In order to design a low flow loss ultrasonic fan blade, a numerical optimization ultrasonic blade design software was developed. Taking the main geometric parameters of the blade as the leaf design parameters, aiming at the first stage fan rotor with axial inlet, , The minimum loss is the objective function.After optimization, most of the design folds are straight and the angle of flow is small, and the deceleration and pressurization are realized entirely by the shock wave.According to the gradual increase of chordal blade thickness, the cascade channel is shrunk, The flow through the cascade supersonic flow is decelerated and supercharged.The cascade flow field of the cascaded cascade with optimized aerofoils has multiple shock waves and low flow losses.The design results show the feasibility of the design method and provide new ideas for the design of the ultrasonic fan blade.