Abstract
Detailed theoretical studies on the effect of flame spread mechanism on starting transient of solid rocket motors with non-uniform ports have been carried out with the help of a 2-d Navier Stokes solver. In this paper more tangible numerical results for starting transient studies have been reported. It is observed that altered variation of the flame spread rate will alter the starting transient as well as the ignition peak of solid rocket motors. Considerable variation of ignition peak has been observed for solid rocket motors with port expansion configurations where secondary ignition is apparent. Detailed picture of the flame-spread in three idealised port configurations have been presented in this paper to establish the state of the art. This is followed by a parametric study, which throws light on the highpressure rise rate often observed during the starting transient of solid rocket motors with non-uniform ports.
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