Surge margin test and research of AV90-3 axial compressor in 0 .6m continuous transonic wind tunnel
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摘要: 为了测试出AV90-3轴流压缩机在0.6 m连续式跨声速风洞中的安全运行范围,采用减小进气体积流量测定喘振点的测试方法和测压力波动的喘振判别方法,准确测试出了AV90-3轴流压缩机的喘振边界线。得出了静叶角增大后,喘振边界线向右上方拉伸和增压、负压下的喘振边界线与常压时基本重合的试验结论。通过将进气体积流量和压比作为防喘振的控制参数,设置报警线和防喘振曲线,采取旁通回流的方法,有效预防了喘振发生。可为后续大型连续式风洞压缩机的喘振边界测定和防喘振控制提供依据和参考。Abstract: In order to determine the AV90-3 axial compressor’s safe working area in the 0.6m continuous wind tunnel,the test method of reducing the compressor’s inlet volume flow to deter-mine the surge point and that of monitoring the pressure to distinguish the surge are employed. The surge margin of the AV90-3 axial compressor is accurately determined.It comes to the con-clusion that the surge margin is extended to the top-right as the static blade angle increases and the surge margins both above and below atmospheric pressure fit well with that at atmospheric pressure.The surge is prevented occurring effectively by selecting the ratio of the inlet volume flow to the pressure as the anti-surge control parameter,setting alarm and anti-surge curve,and taking by-pass circumfluence.It can provide reference to large-scale continuous wind tunnel com-pressor’s surge margin test and anti-surge control.
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