Calculation of fragment ejection velocities on explosion of a launcher
Abstract
Fragment ejection velocities resulting from the explosion of an Ariane launcher are estimated. Many assumptions are made to simplify the model. The assumptions overestimate the consequences, so as to achieve a safety margin. The fragments are ejected under the pressure of gases issuing from the explosion. Two modeling approaches are oriented and compared. The first utilizes spherical symmetry to obtain global equations of the phenomenon. The second method is more precise but requires greater computer time. It models the Euler equations for fluids in a two dimensional moving grid system, and uses a Harten type numerical scheme. Certain cases corresponding to an explosion of an Ariane 4 type launcher are presented.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 September 1990
 Bibcode:
 1990STIN...9131195D
 Keywords:

 Aerial Explosions;
 Ariane Launch Vehicle;
 Fragmentation;
 Launchers;
 Mathematical Models;
 Velocity Distribution;
 Aerospace Safety;
 Computational Grids;
 Differential Equations;
 Ejection;
 Euler Equations Of Motion;
 Gas Pressure;
 Numerical Analysis;
 Launch Vehicles and Space Vehicles