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 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 inter-stage 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 with 2-D high-response probe techniques. The combined-probe technique provides a feasible 3-D flow measurement method for flow diagnosis in small multistage compressors.