Computational Analysis and Validation for Lateral Jet Controlled Missiles

Comparison of three-dimensional, viscous, turbulent Navier–Stokes simulation for generic missile bodies with wind-tunnel tests have been performed with and without lateral jet thrusters for  ow Mach number range of 2–5 and angles of attack of 0–20 deg. Computationalresults show good overall engineering predictive capability for the surface pressure, normal force coefŽ cient, and jet interaction effects. Further analysisof the computationalresults shows that the favorable upstream pressure zone (lambda zone) created by the lateral jet, unfavorable pressure loss behind the jet caused by its blockage effect, and the jet wraparound effect are the three principal competing physical mechanisms that inhibit or enhance the jet ampliŽ cation factor. Canted jet studies to enhance the Ž rst of these effects show substantial increase in favorable pressure; however, it does not recover axial component of the thrust vector. Qualitative computations for multijets and hot/binary gas thruster jets have been presented to demonstrate the overall computational capability for missile design applications.