Numerical study of aerodynamic characteristics of the reentry vehicle and a structural element in its base in the process of their separation

Abstract

The paper considers the effect that the separating process of a parachute container hatch door (PCHD) in the base of a reentry vehicle has on their aerodynamic characteristics. The FlowVision software package was used for flow simulation. With the help of a dynamic mesh, the trajectories of the PCHD movement were obtained without taking into account the gravity. The aerodynamic characteristics of the reentry vehicle and PCHD (in motion) were determined. The cases in which the PCHD and reentry vehicle may collide were identified. For these cases, a pulse analysis was carried out and the minimum initial velocity for the safe separation of the PCHD was determined.