Studies on the Effects of RDX Particle Size on the Burning Rate of Gun Propellants

A.G.S. Pillai; C. R. Dayanandan; M. M. Joshi; S. S. Patgaonkar; J. S. Karir

doi:10.14429/dsj.46.4053

A.G.S. Pillai High Energy Materials Research Laboratory, Pune
C. R. Dayanandan High Energy Materials Research Laboratory, Pune
M. M. Joshi High Energy Materials Research Laboratory, Pune
S. S. Patgaonkar High Energy Materials Research Laboratory, Pune
J. S. Karir High Energy Materials Research Laboratory, Pune

DOI: https://doi.org/10.14429/dsj.46.4053

Keywords: Closed vessel firing, Gun propellant, RDX based propellants

Abstract

The ballistic properties of RDX-based propellants are highly dependent on the particle size of RDX used. The effect of RDX particle size on the burning rate and pressure exponent of the gun propellant was studied. Propellant formulation containing RDX to extent of 60 per cent in the composition was processed with varying particle size of RDX. Finished propellants in heptatubular and cord geometry were evaluated for ballistic aspects by closed vessel firing in a 700 cc vessel at a loading density of 0.18 g/cc. The data obtained clearly indicate that increase in particle size of RDX increases the burning rate as well as the pressure exponent.