Numerical Simulation of Water Cooling of the Plume of an Experimental Solid Rocket Motor

Typical solid rocket motor exhaust emissions consist of high temperature gaseous pollutants including hydrochloric acid, chlorine, and alumina particles. A scrubber is developed to treat the gaseous and particle pollutants present-reducing the detrimental impact of such testing on the environment. A series of water spray configurations are studied to cool the plume without alumina particle modelling. A system consisting of two jets oriented at 60 degrees offers the best performance without compromising safety; the exhaust gases are cooled from over 3000 K to ambient over a distance of 1 meter from the nozzle exit. This paper is published with the permission of the authors granted to 3AF - Association Aéronautique et Astronautique de France (www.3AF.fr) organizer of the Space Propulsion International Conference.