叶顶坡角对压气机转子气动性能影响的数值模拟研究

Numerical Simulation of Different Tip Slope Angle Effects on Aerodynamic Performance of a Compressor Rotor

采用数值模拟的方法对某压气机转子进行了三维仿真分析,详细比较了叶片叶顶磨损后形成的不同叶顶坡角α对转子气动性能的影响。研究结果表明,随着α的增大,转子最高压比、峰值效率及喘振裕度衰减均越严重,但在设计压比点,转子效率呈略微增加的趋势。α会影响转子叶尖约25%区域内负荷的径向分布,但对几乎整个叶高通道的效率分布都产生了影响。叶顶磨损导致部分性能参数衰减呈非线性变化,在α超过5°和25°时,转子喘振裕度会产生一个较大幅度的衰减。

By adopting numerical simulation method,a three-dimensional simulation analysis of a compressor rotor is carried out.The effects of different tip slope angles(α)formed after blade tip abrasion on the rotor aerodynamic performance are compared in detail.Research indicates that with the increase of theα,the maximum pressure ratio and peak efficiency and surge margin decrease more seriously.But at the design pressure ratio point,the rotor efficiency slightly increases.Theαaffects the radial distribution of the load in about 25%of the rotor tip region,but it affects the efficiency distribution of almost the whole blade channel.When theαexceeds 5 degrees and 25 degrees,the surge margin of rotor will produce a large attenuation.