Airblast Measurements and Equivalency for Spherical Charges at Small Scaled Distances
SOUTHWEST RESEARCH INST SAN ANTONIO TX
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An experimental investigation was conducted to obtain direct measurements of side-on overpressures from spherical charges of six different high explosives at small scaled distances ranging from 0.74 to 3.5 ftlb to the 13 power. The pressure-time recordings of the incident airblast waves were processed to obtain peak side-on overpressures, shock wave arrival times, side- on overpressures, shock wave arrival times, side-on impulses, and positive durations. Comparisons of the test data were made with standard blast curves for these four parameters. The side-on overpressure and arrival timw data from the TNT tests are in excellent agreement with the standard curves. TNT equivalencies for each of the six explosives were determined using the standard pressure and impulse curves, as well as the actual TNT test data obtained. These results indicate that the pressure based TNT equivalency at small scaled distances for some of the explosives tested can be significantly different than that based on the heat of detonation.
- Ammunition and Explosives