One way to investigate rear nozzle effect of air-breathing vehicle in wind tunnel

Air-breathing vehicles are designed as airframe/propulsion integrated, which means the body of vehicle and the propulsion system are highly integrated. Tail body is the part of nozzle, while shape of the nozzle is non-axil-symmetrical, so aerodynamics issues will be changed when the propulsion system works. Because of rear nozzle of air-breathing vehicles could be used to not only air-breathing but also as a scramjet engine, the mediums of jet will work at two different total temperature. How to investigate rear nozzle effect of air-breathing vehicle in hypersonic wind tunnel will be given in details in this paper.