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Xiao Wang,Ruyi Tao,Wenjun Ruan,Hao Wang,Dongjian Su,Xinggan Lu 한국항공우주학회 2021 International Journal of Aeronautical and Space Sc Vol.22 No.2
Detached Eddy Simulation is used to study the interaction flowfields of a supersonic lateral jet penetrating into the crossflow of projectiles with cruciform or X-type fin configurations at Ma=0.3 and α=0∘,30∘∼60∘. For α=0∘, typical flow structures such as barrel shock, Mach disk and counter-rotating vortex pair(CVP) induced from the jet orifice are observed. Asymmetrical flowfields downstream of the jet for α=30∘ are analyzed, as well as the pressure distribution on the surfaces of all the projectiles. The reason why the CVP mentioned above disappears in this condition is also proposed. The variations of the normal forces acting on these projectiles are pointed out. The investigations into the amplification factor and the control efficiency of the jet force show that X-type fin configuration is more beneficial to maintain attitude for projectiles at large angle of attack.