Numerical Simulations of Supersonic Flow Over an Elliptic Projectile with Jet Interaction

摘要

Computational fluid dynamics (CFD) approaches were used to compute the supersonic flow fields and aerodynamic forces and moments on an elliptic projectile with jet interaction. Steady state numerical results have been obtained for the jet interaction problem at a supersonic Mach number, Mach = 4. 0, and several angles of attack from 0 deg to 12 deg via Navier-Stokes computational techniques. The jet modeled in this problem is a supersonic helium jet exhausted into the free stream flow at a high pressure. Computed CFD results show the qualitative features and strong flow interaction between the jet and the free-stream flow. In general, very good agreement of the computed aerodynamic coefficients with the experimental data was achieved for all angles of attack investigated for the 'jet-on' conditions. The results show the predictive capabilities of CFD techniques for supersonic flow over elliptic projectiles with jet interaction.