Computational approach for vertical launcher by coupled CFD/CSD with hybrid particle level-set method

In order for an preliminary design of the vertical launch system(VLS), the rear-side aft closure plays a significant role in protecting interiors from the exhaust gas induced by ignition of adjacent canister. Since VLS is a fully three-dimensional component, it will require tremendous computation for its fluid-structural interaction (FSI) analysis. Thus, efficiency of analysis should be considered to relieve the computational cost incurred. This paper presents a two-dimensional FSI approach on elasto-plastic behaviors of rear-side aft closure in VLS under the rocket plume loads. Such rocket plume load is predicted by fully Eulerian analysis. Non-linear structural model for the rear-side aft closure is obtained by total Lagrangian -based 9-node planar element. The interface between the motion and boundary conditions are described by a hybrid particle level-set method via the ghost fluid framework. Finally, coupling between the structural and rocket plume load is conducted. By this approach, computational FSI framework is established and the results are also presented.