Calibration Results for Stationary Pressure Rakes Sensing Yaw Angle Downstream of an Axial Compressor Stage.
Interim rept. 1 Sep-31 Dec 74,
AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO
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This report presents the results of aerodynamic calibration of stationary rakes designed to measure total pressure and yaw angle at the exit of an axial compressor stage. Eight identical rakes were tested. Each rake contained seven radially distributed stagnation tubes. The second, fourth, and sixth element on each rake contained two additional tubes arranged in a cobra probe configuration. One rake was tested for Mach number sensitivity over a plus or minus 20 degree range of yaw angle. The remainder were calibrated over a range of plus or minus 10 degrees at approximately 0.6 Mach number. In addition to raw calibration data, the constants of a first-order curve obtained from a least-squares fit of the calibration data are presented for each yaw element of each rake.
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