An Experimental Study of Solid Propellant Deflagration Using High Speed Motion Pictures and Postfire Residue Analysis

摘要

Six aluminized propellants were investigated through strand burning in a windowed combustion bomb at 500 psi and 1000 psi. Postfire particle residues were analyzed with a scanning electron microscope and found to have bi-modal size distributions. The mean diameter of the fine particle distribution was approximately 10 microns in all cases while the mean diameter of the coarse particles was approximately the same size as the initial aluminum cast in the propellant. Measurements taken from the high speed motion pictures included resolution, propellant burning rate, the diameter of the burning particles ejected from the surface, and vertical burning particles. The diameters of burning particles were approximately 7 to 12 times the diameter of the initial aluminum cast in the propellant. Aluminum size had only small effects on burning rate. The smallest particle that could be accurately resolved with the motion pictures was approximately 60 microns. (Author)