Abstract
Triaminoguanidine nitrate (TAGN: CH9N7O3) is a high-energy explosive which contains a large amount of hydrogen in the molecular structure. The oxidizer fragment (HNO3) is attached to the fuel fragment, by an ionic bond. In this study, the measurements of burning rate, combustion wave structure, and thermochemical properties were conducted. The burning rate of TAGN increases linearly with increasing pressure in a ln (pressure) vs In (burning rate) plot. The pressure exponent of burning rate is determined to be 0.78. The exothermic reaction at the first-stage decomposition process (488–498K) is considered to be caused by the breakage of N-NH2 bond. The heat produced in the surface reaction zone during TAGN burning is also determined to be 525 kJ/kg. The luminous flame stands some distance above the burning surface. The flame standoff distance decreases with increasing pressure. The heat flux fedback from the gas phase to the surface reaction zone increased with increasing pressure. The burning rate of TAGN depends mainly on the heat released in the surface reaction zone and the heat transferred back from the gas phase to the surface reaction zone.
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