Development of a mathematical model of thermal decomposition of hydrazine in a engine

Abstract

An overall chemical kinetics for the decomposition of hydrazine has been found for temperatures near 800°K and 1000°K which can be used in the gas-dynamic equations of the engine when the mechanical or residence time of the engine is large compared with the radicals relaxation time. This overall kinetics is used for an steady state analysis using the approximation of perfectly stirred reactor, for times both shorter and larger than the time for wall temperature to reach a steady condition; the validity of these approximations is studied. An alternative plug flow model in which heat is conducted upstream by solid bars is analyzed. In the last chapter a review is made of the results and criteria useful for the experimentalist interested only in the application of the conclusions of this report.