叶尖间隙对小流量超音压气机级性能的影响

为研究叶尖间隙对级环境下压气机气动性能的影响,以带导叶的超音压气机级为研究对象,采用商用软件NUMECA对该压气机在转子叶尖间隙为0、0.3、0.6、0.9 mm时进行三维数值计算,分析了该压气机级气动性能及流动特点.结果表明:随着叶尖间隙的增大,转子叶尖处激波向上游移动;静子进口气流攻角增大,最终导致压气机稳定工作裕...

Effects of Tip Clearance on Performance of Small Flow Supersonic Compressor Stage

In order to study the influence of tip clearance on the aerodynamic performance of the compressor in the stage environment, this paper takes the supersonic compressor stage with guide vanes as the research object, and the commercial software NUMECA was used to carry out three-dimensional numerical calculation of the compressor when the tip clearance of the rotor is 0.0 mm, 0.3 mm, 0.6 mm and 0.9 mm, and analyzed the aerodynamic performance and flow characteristics of the compressor stage. The results show that: with the increase of tip clearance, the shock wave at the rotor tip moves upstream; the angle of attack of the inlet flow of stator increases; finally, the compressor stability margin, the efficiency of rotor peak point and the low loss range of stator decrease. The tip clearance has little effect on the performance of the inlet guide.