The application of CFD to the prediction of missile body vortices

Abstract

This paper reports the results of a collaborative study to apply Navier-Stokes computational techniques to a complex flow field with highly separated flow for a missile shape to evaluate the predictive technology. Nine Navier-Stokes computational codes were applied to predict the flow about an ogive-cylinder configuration for transonic and supersonic velocities at 8 and 14 deg angles of attack. The computational results were compared to experimental measurements for surface pressure, pitot surveys of the outer flow field, and strain gage force measurements. Computational results were obtained for nine turbulence models, laminar flow, and inviscid flow. For the conditions of this study, no 'best' turbulence model could be identified in the comparisons to experiment. Predictions of surface pressure and outer vortical flow in regions of highly separated flow indicate further development of the predictive technology is required; however, the prediction of aerodynamic lift and pitching moment are within acceptable design requirements. (Author)