Computation of transient three-dimensional interstage flowfields using the arbitrary Lagrangian-Eulerian method
Abstract
The Arbitrary Lagrangian-Eulerian Method was used to compute the transient, three-dimensional flowfield in the expanding interstage region between two missile stages during stage separation. The governing equations employed were mass, momentum, and energy conservation for an inviscid gas. The perfect gas assumption was made. The upper stage motor ignition transient and the exterior flowfield were included in the model. Grid rezoning was employed to allow the mesh to follow the motion of the lower stage, and a grid remapping technique was developed to restructure the grid during the stage separation process. Shock tube flow, source flow, and steady shock reflection studies were performed to verify the numerical method. Full-scale and sub-scale interstage flowfields were simulated. Computational results compared favorably with experimental data from sub-scale separation tests.
Degree
Ph.D.
Advisors
Hoffman, Purdue University.
Subject Area
Mechanical engineering
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