Study of Combustion Mechanism of Nitramine-Polymer Mixtures
Final rept. 30 Jun 1999-30 Aug 2000
RUSSIAN ACADEMY OF SCIENCES MOSCOW INST OF CHEMICAL PHYSICS
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Combustion mechanisms of mixtures with energetic binders and nitramines RDX, HMX were studied in wide region of pressures and initial temperatures. 8 mixtures having 4 modern energetic binders were investigated. Temperature profiles of burning waves were obtained by microthermocouple techniques. 17 characteristics of fwaves were established for every mixture and every combustion regime by measurements and data processing. Temperature and pressure sensitivities of burning rate and surface temperature were estimated. Criteria of stable combustion were determined. Characteristic features of the combustion mechanisms were described. It was established, partly, that significant heat release in solid and weak heat feedback from gas to solid are observed for all mixtures. The control region which governs the burning rate is located in solid part of the combustion waves and in a thin gas layer close to the burning surface. Burning rate response functions to oscillatory pressure were found. Comparisons of combustion mechanisms of mixtures with energetic binders and mixtures with HTPB were made. Obtained data provide base for modelling different combustion phenomena of these mixtures.
- Polymer Chemistry
- Combustion and Ignition