In the design and development of SRMs, the use of numerical tools able to predict the behavior of a given motor is important in order to decrease the planning times and costs. This paper is devoted to present the results of the internal ballistics numerical simulation of the NAWC tactical motor n. 6, from ignition to burn-out, by means of a quasi-one-dimensional unsteady numerical model, SPINBALL, coupled with a three-dimensional grain burnback model, GREG. In particular, the attention is focused on the effects on the SRM behavior of erosive burning, total pressure drops and the cause of the pressure overpeak occurring during the last part of the ignition transient. The numerical simulation shows a very good agreement with the experimental pressure trace. NAWC n. 6 internal ballistic is completely led by erosive burning, which is the root cause of the pressure peak occurring immediately after the SRM start-up.
|Titolo:||Internal Ballistics Simulation of a NAWC Tactical SRM|
|Data di pubblicazione:||2011|
|Appartiene alla tipologia:||04b Atto di convegno in volume|