Flowfield Simulation About a 65-Degree Delta Wing During Constant Roll-Rate Motions

Abstract

Numerical simulations of the flowfield over a 65-degree delta wing undergoing constant roll-rate maneuvers are presented. The unsteady, three-dimensional, full Navier-Stokes equations are solved using a BeamWarming implicit algorithm. Computations are performed for two distinct maneuvers. The first is a constant-rate coning motion, with resulting body-axis moments compared to rotary data from the AFRL vertical wind tunnel. The second is a constant roll-rate, barrel-roll type maneuver with zero pitch and yaw rates. In both maneuvers the angle of attack and sideslip angle are fixed at 30 degrees and zero degrees respectively. Vortex breakdown locations and aerodynamic reactions for these motions are compared to quantify angular rate effects and their impact on recent aerodynamic modeling efforts. Nomenclature