[关键词]
[摘要]
以某型两级跨音速轴流压气机为研究对象,采用实验及数值模拟方法,针对非设计转速下可转导叶调节角度对压气机工作稳定性的作用规律展开研究。首先,通过与实验结果进行对比,验证了数值模拟方法的有效性。其次,对三种不同调节角度下的压气机稳定工作裕度及内部流动机理进行了深入分析。结果表明:随着安装角由正到负调节,效率-流量曲线总体向左移动,压比-流量曲线向左下方移动,当可转导叶调节角度为-8°时,压气机喘振裕度由0°时的7.71%增加到8.24%。
[Key word]
[Abstract]
A twostage transonic axial flow compressor is adopted as the research object.Experimental and numerical simulation methods are used to study the effect of the angle of the inlet guide vane on the working stability of the compressor at offdesign speed.Firstly,the validity of the numerical simulation method is verified by comparing with the experimental results.Secondly,the stability working margin and internal flow mechanism of the compressor under three different adjustment angles are analyzed in depth.The results show that as the installation angle is adjusted from positive to negative,the overall efficiencyflow curve moves to the left on the working characteristic map,and the pressure ratioflow curve moves to the lower left.As the angle of the inlet guide vane is set to -8°,the surge margin of the compressor is increased from 7.71% at 0° to 8.24%.
[中图分类号]
TK474.8+1
[基金项目]
国家科技重大专项(2017-I-0007-0008)