Calibration of the preston probe for high reynolds number flows

Experiments were performed in order to calibrate Preston probes for high Reynolds number applications. The results extend previous calibrations to Reynolds numbers that are approximately 30 times larger. The new calibration is valid in the range 6.4 < x* < 11.3, that is, 4.3 < y* < 8.7 and 280 < D⁺ < 45 000. Within this range, the wall shear stress may be found to within better than ±0.8%, as long as inner layer scaling applies up to a wall distance equal to the probe diameter.