Dautriche – Shock Tube Measurement of High Propagation Rates in Pyrotechnic Materials

 K.L. and B.J Kosanke

Introduction: There are times when it is of interest to measure propagation rates in highly energetic pyrotechnic materials, such as flash powder. These rates tend to range from less than 1000 to about 5000 feet per second. Conventional means of making such velocity of propagation (VOP) measurements involve the application of techniques developed for use with high explosives in order to make velocity of detonation (VOD) measurements. Some examples of the equipment used are high speed framing cameras, streak cameras, continuous velocity probes, and any of the various so-called “pin” techniques. These approaches require expensive instruments and in some cases may not be entirely reliable in the lower reaction pressure regime of pyrotechnics, especially when weakly confined.1,2,3

Ref: Selected Pyrotechnic Publication of K.L. and B.J Kosanke, Part 2, (1990-1992), pp 49-54

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