, Shahid Beheshti University
Department of Aerospace Engineering, Amirkabir University
A numerical dynamic-aerodynamic interface for simulating the separation dynamics of constrained strap-on boosters jettisoned in the atmosphere is presented. A 6-DOF multi body dynamic solver ،using Constraint Force Equation Methodology is coupled with a numerical time dependent Euler flow solver. An automatic dynamic mesh updating procedure is employed using smoothing and local remeshing technique in respect of bodies motion during separation. This interface can simulate multi body separation problems such as strap-on boosters separation as a result of full separation mechanisms like springs, thrusters, joints and so on, interaction with aerodynamic effects .The flow solver is validated by the Titan-IV launch vehicle experimental data. The full separation integration is used for a typical launch vehicle with two strap-on boosters using spring ejector mechanism and spherical constraint joints acting in the dense atmosphere. Hence the aim of presented interface is to facilitate integration of complicated separation mechanisms simulation with a full numerical CFD aerodynamic solver.