Optical Pressure Measurements of Explosions
Final rept. Jan 2011-Jan 2013
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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High-speed video and streak-camera imaging are used to measure peak pressures for explosions of spherical charges of C-4. The technique measures the velocity of the air shock produced by the detonation of the explosive charges, converts this velocity to a Mach number, and uses the Mach number to determine a peak shock pressure. Peak pressure measurements are reported from a few millimeters to 1 m from the charge surface. Optical peak pressure measurements are compared to peak pressures measured using mechanical pressure transducers, and to peak pressure measurements estimated using the blast estimator computer code CONWEP. A discussion of accuracy of peak pressures determined optically is provided.