Abstract
Corrections for the effect of the mass moisture concentration on the Mach number, flow velocity, Reynolds number, and dynamic pressure in transonic wind tunnels in the absence of vapor condensation are derived. The significance of corrections is estimated based on the accuracy of total and static pressure measurements and on the drag coefficient error requirements. The humidity corrections to the dynamic pressure and to the Mach and Reynolds numbers are found to be negligible. The correction to the flow velocity turns out to be significant, reaching the maximum value of 0.4% at the natural level of humidity.
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