Detonation Velocity Measurements from a Digital High-speed Rotating-mirror Framing Camera
Final rept. Jun-Aug 2012
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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Rate-stick experiments were performed and digital high-speed framing-camera images were captured to determine energetic material detonation wave velocities. Rate-stick experiments consisting of 20-mm-diameter pressed pellets having a length-to-diameter LD ratio of 1, with the total charge having a LD of 10, were conducted. Digital high-speed images were recorded at rates upwards of 2.5 million framess using a Cordin model 570 rotating-mirror framing camera. Individual images were analyzed to determine the pixel position at which the reaction products break out from the energetic material-air interface. Position-time records were constructed and best-fit lines applied to the data to determine detonation velocities. The results of three different energetic materials are presented. Detonation velocities were found to be in good agreement with piezo-pin velocity measurements concurrently taken.