出口测量探针布局对轴流压气机气动性能试验的影响研究

为了研究出口测量探针布局(探针数量及所处轴向位置)对压气机气动性能试验的影响，针对含测量探针的三级轴流压气机开展全周非定常数值计算。结果表明：出口测量探针将改变上游的流场结构，在末级叶片进出口截面对应探针的周向位置处形成局部高总压区和气流角偏移区，该区域覆盖有3～4个叶栅通道；随着探针与末级叶片轴向距离增加，高总压区的强度减弱，但作用范围增加；增加出口探针数量并未明显改善压气机试验性能评估精度，与无探针条件下的压气机性能相比，压比偏高0.6%,效率绝对值偏高1.8%;为减少试验中基于探针测点得到的压气机性能试验误差，不仅需考虑探针对测量截面流场的影响，更应根据测量截面流场不均匀性合理布局探针。

Investigation of the effect of outlet measurement probe position on axial compressor aerodynamic performance test

In order to investigate the influence of the outlet measurement probe layout such as the number and the axial position on the compressor aerodynamic performance test, the unsteady numerical analysis of a full annulus three stage axial compressor including the probes was carried out. The results show that the outlet measurement probe will change the upstream flow field structure and form the local high total pressure zone and flow angle deviation region at the inlet and outlet sections of the last stage vane in circumferential direction, which cover 3 to 4 cascade channels; with the increase of the axial distance between the probe and the last stage vane, the strength of the high total pressure zone decreases, but the influence range increases; increasing the number of outlet probe does not improve the accuracy of compressor test performance evaluation obviously, the pressure ratio is still 0.6% higher and the efficiency absolute value is 1.8% higher than the performance of a compressor without probes; in order to reduce the compressor performance test error based on the probe measurement points in the axial compressor test, not only the influence of the probe on the flow field on measurement plane should be considered, but also a reasonable layout of the probe should be carried out according to the non uniformity of the flow field on the measurement plane.