LARGE-EDDY SIMULATION OF A ROCKET BOOSTER JET: TOWARDS A BETTER PREDICTION OF THE IMPACT OF SOLID-FUEL LAUNCHERS ON THE ATMOSPHERE.

摘要

This paper presents a large-eddy simulation (LES) of arnsolid rocket booster jet. The objective of the study isrnto progress towards a better understanding of the atmosphericrnimpact of solid-fuel launchers. A thermodynamicallyrnequivalent gas is injected through the entire nozzlernof the booster to the atmosphere at flight conditions of 20rnkm of altitude. A new overset grid method is used in orderrnto extend the computational domain up to 400 nozzlernexit diameters downstream. The structure of the resultingrnjet is that of a typical supersonic under expanded jet andrnis in good agreement with previous studies.