Calibration of the R.A.E. bedford 8 ft. x 8 ft. wind tunnel at subsonic speeds, including a discussion of the corrections applied to the measured pressure distribution to allow for the direct and blockage effects due to the calibration probe shape

Abstract

A calibration of the 8 ft x 8 ft wind tunnel has been performed at subsonic speeds using a multiple orifice, traversing, static pressure probe on the tunnel centreline. Full details have been obtained of the static pressure distribution along the tunnel centreline between 69 inches upstream and 50 inches downstream of the tunnel datum. Additional measurements were made of tunnel wall static pressure distributions. Modifications to the nozzle profile, introduced just prior to the present calibration in order to reduce the size of the static pressure gradient, proved successful.