IGNITION OF POWDERED FUELS BEHIND SHOCK WAVES,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
The ignition and combustion behind a reflected shock wave of particles stirred up from a layer of finely divided fuel by a passing shock wave have been studied experimentally. It is noted that the results of this study may be of interest for the study of the kinetics of heterogeneous combustion reactions. The fuel used was charcoal, brush carbon, or black powder. The data indicate that the fuels ignite behind shock waves at M 2.25 and above with different ignition delays. The minimum ignition temperature was about 900K for the carbons and 800K for black powder. Pressure oscillographs showed that pressure behind the reflected shock front at the end of the tube remains constant for about 1.5 msec, then increases for 6-8 msec.
- Combustion and Ignition