Combustion mechanism of two propellants, differing in composition and combustion rate, with high content of ammonium nitrate (AN) is studied with the aid of micro thermocouple, video recording and electron-microscope. It is shown that on the combustion surface of propellants molten AN layer is formed, whose thickness depends on propellant composition and pressure, in which combustion takes place. It is established that combustion of these propellants takes place according to condense-phase model, in which the majority of heat needed for combustion propagation is released: in the case of high calorific propellant with 50% AN - by mean of base-propellant decomposition; in the case of low calorific propellant with 70% AN - by mean of decomposition of molten AN layer, accelerated by decomposition products of base-propellant.
механизм горения, температурный профиль, нитроэфир, нитрат аммония, combustion mechanism, temperature distribution, nitrate ester, ammonium nitrate
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