Diffuser Efficiency and Flow Process of Supersonic Wind Tunnels with Free Jet Test Section

摘要

In the wind tunnel arrangement under consideration, the air leaves the Laval nozzle as a free Jet and is recaptured by the dtffuser, which is of the convergent-divergent design. A theoretical analysis of the flow process through this type of supersonic wind tunnel is presented and the diffuser efficiency is calculated for the case of equilibrium between test chamber pressure and pressure in the nozzle exit, assuming one-dimensional, inviscous, steady flow.