Inviscid/boundary layer prediction of aerodynamics for a bent-axis biconic geometry

Newly developed inviscid and boundary layer codes are applied to the prediction of forces and moments for both on-axis and bent-axis biconic orbital transfer vehicle configurations. The inviscid code solves the full three-dimensional form of the nonconservative Euler equations. It features parabolic grid generation and an improved method of characteristics boundary condition. The boundary layer code solves the integral forms of the momentum and energy equation along inviscid streamlines. Generally good agreement is found in comparisons of the inviscid/boundary layer predictions with the experimental data at angles of attack up to 30/sup 0/.