Prediction of the Full-Scale Cook-off Response Based on Small-Scale Testing Navy STTR FY2010.A Sol No.: Navy STTR FY2010.A Topic No.: N10A-T011 Topic Title: Prediction of the Full-Scale Cook-off Response Based on Small-Scale Testing Proposal No.: N10A-011-0627 Firm: BlazeTech Corp. 29B Montvale Ave. Woburn, Massachusetts 01801-7021 Contact: N. Moussa Phone: (781) 759-0700 Web Site: www.blazetech.com Abstract: We propose to develop scaling relationships for reaction violence in the cook-off of energetic materials such as explosives or propellants. This will be accomplished by a coordinated effort consisting of data review and analysis. The anticipated results include key non-dimensional parameters that incorporate the thermo-physical, flow, thermodynamic, and kinetic properties of the material, the heating rate in terms of intensity and duration, the thermo-physical properties of the casing and liner (if any), and the strength and degree of confinement of the casing. Furthermore, scaling relationships will be developed for the violence of the reaction relating attributes such overpressure, vivacity, casing fragmentation, and travel distance of fragments to non-dimensional parameters. This scaling relationship will be used to identify practical means of compensating for the reduction of scale in the experiments. Key comparisons and success criteria will be identified to evaluate our scaling approach. The project will also identify data gaps and key tests and instrumentation to be performed in Phase II. Benefits: The proposed innovation provides a framework for the near-term design of scaling experiments without the detailed understanding required by computational methods. This will enable faster development of IM materials and more efficient characterization of hazard classification of propellants and munitions. This would benefit the Navy, Air Force, and Army programs in charge of these activities. In the civil sector, this innovation has direct application to the Department Of Transportation evaluation of hazardous energetics. Furthermore, the innovation can be used in the scaling of other activities such as testing of munitions and propellant performance. A significant savings in effort, money, and time can be achieved in all of the above. Return