Effect of Surface Microstructure on the Temperature sensitivity of Burning Rate of Ammonium Perchlorate

Abstract

ofpowder AP has ~n detennined and it is observed that °p(ROwder) > Op(pellel), which clearly suggests that of is influencqi by tl1e surface tempcrature sensitive parameter (aT slaT o)p and hence by the surfacdsubsurface microstructure. In powder burning, the buoyal1t lifting of the particles into the gas phase occurs, whic~constitutes the so-called 'free board region' (FER) extending just above the b"ue I surface. Consequenl to the decomposition of AP particles in FER, the condensed phase heat release gets curtailed and Op(pow.der) becomes larger. A general relationship for Op in tenns of density and surface temperature is suggested,

Cast composite solid propellants with different combustion stabilizers

“…Due to its unique characteristic of self-supporting deflagration, the AP combustion has been studied primarily in order to understand the combustion phenomena in the APbased CSP [5]. It happens that the exothermic decomposition of the AP takes place before melting at temperatures above 200°C (270 -300°C).…”