Calibration of a Four-Hole Probe in Sub-, Trans- and Supersonic Flow

Abstract

When applying pneumatic probes within aerodynamic research there is a demand of calibrating these probes. Especially at transonic velocities there is a general lack of sensitivity resulting in big errors. To overcome this problem it is necessary to include additional information – the pressure behind the probe – into the calibration process. In this report the wind tunnel for probe calibration and the probe of interest are described as well as the applied calibration process. Results are compared with and without considering the back pressure in the probe’s wake.