组合探针测量压气机级间三维动态流场的方法

A method for measuring 3-D unsteady flow at exits of a compressor rotor using combined probes

提出了一种组合高频压力探针测量跨声速多级压气机级间三维动态流场的方法,组合探针由经过风洞三维气动校准的圆柱单孔、楔顶单孔两支高频压力探针组成,采用位移机构将两支探针安装到被测压气机级间相同轴向位置和径向位置、不同周向位置的测点,采用锁相采样技术和旋转探针技术,在探针不同角度位置下各自获得级间动态压力信息,利用气动校准数据处理测量数据,可获取级间三维气动参数沿周向和径向的分布。和现有三维动态探针相比,具有尺寸小、空间分辨率高、频响快、测量范围宽、对被测流场干扰小、能测量小型压气机级间流场参数动态变化的特点。与二维动态压力探针相比,能测量气流俯仰角,测得的总压、静压和马赫数更准确,能更全面反映压气机级间三维流动特征,为小型跨声速多级轴流压气机流场诊断提供了一套有效的三维动态测量手段。

A method for measuring 3-D unsteady flow at an exit of a transonic multistage compressor rotor was presented by using combined high-response pressure probes consisting of a cylinder 1-hole probe and a tip-wedged 1-hole probe,which were calibrated in a wind tunnel.The probes were put in the interstage at the same axial and radial but different tangential positions with the help of two traverse mechanisms,and unsteady pressure data were obtained utilizing a phase-locked technique at different angular positions.Distributions of 3-D flow parameters were obtained through data processing.Result showed that the combined probes were characterized by small size,high frequency,wide measurement range and weak interrupt compared with other current 3-D high-response probes,while the method can obtain flow pitch angle and more accurate total pressure,static pressure and Mach number compared with2-D high-response probe techniques.The combined-probe technique provides a feasible 3-D flow measurement method for flow diagnosis in small multistage compressors.