| Citation: | GUO Junde, MA Hongwei, FAN Congcong, et al. A method for extending measurement range of five-hole pressure probe[J]. Journal of Aerospace Power, 2022, 37（11）：2659-2667 doi: 10.13224/j.cnki.jasp.20220295
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In order to extend the measurement range of five-hole pressure probe (FHPP), the probe was calibrated firstly in a low-speed wind tunnel. The extending method was applied to process the calibration data, the differences of the probe calibration curves defined by different calibration coefficients were compared, and the measurement range of the FHPP in low-speed flow was determined. On this basis, the applicability study at different Mach numbers was carried out in a subsonic wind tunnel to evaluate the application effect of the extending method in compressible flow. Finally, actual measurement was carried out in the wind tunnel to analyze the error level of the extending method. The results showed that: the calibration curve had a wider monotonic range and higher calculation accuracy after using this calibration coefficient definition. At low speed, the FHPP was applicable within the measurement range of yaw angle ±70° and pitch angle ±50°. At subsonic speed, the compressible flow had a great influence on the negative measurement range of the pitch angle, but the measurement range of the yaw angle can still reach close to ±70°. The error analysis results also showed that the error level measured by the extending method was generally lower. This method for extending the angular measurement range of FHPP has a good application prospect in some turbomachinery internal flow tests with a large angle variation range.
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