The Effect of Propellant Composition on Secondary Muzzle Blast Overpressure
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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Secondary muzzle flash results from the reignition of a mixture of fuel- rich exhaust gases and entrained air. This combustion process, which leads to energy released as light, also leads to acoustic energy release - noise. The additional blast overpressure resulting from secondary flash is here referred to as secondary blast. The availability of new observational data and a new flash prediction code permits insight into the link between secondary blast and into the possible suppression of both by judicious choice of propellant. Extensive tank-gun firing data have recently been gathered on candidate low-vulnerability LOVA propellants. These data included high-speed films, blast overpressure measurements, and measurements of visible illumination from the flash. All of the propellant candidates were fuel-rich, and without a chemical suppressant they could be expected to flash in these tank-gun-firing situations. Three candidates, however, exhibited a significantly brighter visible secondary flash than the others. We found we could correlate the brighter flash with the expected products of their combustion more important, the brighter flash correlated well with a more intense secondary blast. Thus, the link between secondary flash and secondary blast is reinforced....etc...
- Ammunition and Explosives