Influence of Asymmetric Transition Conditions on a Slender-Body Flight Vehicle

摘要

The flow characteristics of asymmetric vortices and the side force of a tangent-ogive-cylinder flight vehicle at highnangles of attack have been studied by using a three-dimensional upwind Navier–Stokes method with the k-!nturbulence model and a simple laminar–turbulent transition model. Various patterns of asymmetric vortices andnside forces are studied by using various asymmetric laminar–turbulent transition conditions. Asymmetricallynchanging turbulent viscosities that arise from asymmetric laminar–turbulent transition conditions cause asymmetricncrossflow vortex structures and side forces at higher angles of attack. The magnitude and structure of the crossflownvortices and side forces were sensitive to changes in the factors of the model of laminar–turbulent transition.