High spatial resolution MEMS surface pressure sensor array fortransonic compressor IGV measurement

摘要

A high spatial resolution MEMS pressure sensor array consisting of60 transducers for the measurement of unsteady surface pressures on theinlet guide vane (IGV) of a transonic compressor rig is presented.Measurements from this sensor array will be used to investigatethree-dimensional unsteady vane/blade interaction aeromechanical forcingfunctions in a modern, highly loaded compressor stage. Included aredetails of the design and construction of the MEMS array and electronicinterrogation circuitry used for acquisition of the 60 transducersignals using the available data acquisition system. In addition, theMEMS pressure sensor array is used to acquire experimental data. Asample of the data is reduced and shown to give excellent agreement bothin the time and frequency domain when compared with previousinstrumentation using traditional individual sensor mounting methods.Finally, a significant cost saving of 44% in instrumenting the IGV isrealized over traditional instrumentation methods along with substantialbenefits in the handling of the sensor wiring