Numerical investigation of the influence of reynolds number on probe measurements

The influence of Reynolds number Re on probe measurements was investigated numerically including the effects of the pressure holes and their geometry to obtain accurate hole-pressures. The results indicate that Re influences the probe measurements and cannot be neglected for Re larger than 10
⁵
and that the influence increases with Mach number Ma. The calculations show that the pressures in the downwind holes are influenced more by Re than those of the upwind and central holes when the probe is at an angle. Thus 7-hole probes may be more suitable for measurements at different Re than 5-hole probes.