Dependence of the Temperature of the Adiabatic Transformation of Binary Mixtures of Ammonium Perchlorate and Hydrocarbon on the Enthalpy of the Latter’s Formation

Abstract

In the past few years, new systems have been sought to increase the efficiency of aviation fuels through the introduction—together with ordinary hydrocarbons—of high-enthalpy hydrocarbons, such as aromatic acetylenes, and a small amount of solid oxidizer for the preliminary dispersal of the fuel before it enters the afterburner. A new phenomenon has been discovered: the temperature of the adiabatic transformation of the ammonium perchlorate (AP) + diethinylbenzene (DEB) pair behaves differently from the hydrocarbon rubber (or saturated hydrocarbon) + AP pair; over a wide range of DEB content (30 to almost 100%), the adiabatic temperature of the mixture’s transformation remains practically unchanged. It is shown that this is a consequence of the high enthalpy of the formation of hydrocarbon fuel, when as a result of the adiabatic transformation of an individual fuel (in the absence of other components, including air), the temperature reaches 1950–2000 K.