Large Solid Rocket Motor Safety Analyses: Thermal Effects Issues

摘要

Our ability to manage the explosive risks associated with Large Solid Rocket Motors when manufactured, transported, handled and stored is obviously crucial as some of these situations can involve several tons of solid propellants. A mishap reference scenario, focused on HD 1.3 effects, has been defined by the explosive safety authorities leading to residual ambient propellant fire expansion as a result of a LSRM large pieces fragmentation. Modelling this type of scenario still poses a great challenge in terms of scientific knowledge and safety assessment. In that way, some experimental and theoretical works were carried out in the last few years to investigate solid propellant combustion mechanisms at ambient conditions and radiative transfer properties associated with. Precisely, large Eddy Simulation Techniques were studied with the hypothesis that large eddies drive the overall fire flow structure and the hydrodynamics properties. For combustion, the number of length scales that control physical and chemical phenomena is problematic and acceptable compromises must be found in order to develop a model that correctly predict the heat transfer of such a fire.