Ignition of kerosene vapor in supersonic flow around a cylinder with an end windward wall

Abstract

The detonation capacity of kerosene vapor is numerically studied in supersonic flow around a circular cylinder with an end windward wall. The model of kerosene combustion in the air takes into account 68 reactions for 44 components. Its testing is made by the way of comparison with the available calculated and experimental data on the ignition delay time under adiabatic conditions at a constant density. The mathematical model flow past cylinder is based on twodimensional non-stationary Euler equations for a multi-component reacting gas. The enthalpy and entropy of the initial mixture and combustion products are determined by polynomials from the NASA base. Calculations are performed on the basis of the Godunov finite-difference scheme and its modification of increased accuracy. The results allow justifying the parameters of the nozzle with a central body for a supersonic direct-flow chamber with detonative combustion of kerosene.

Comparative Analysis of the Detonation Combustion of Kerosene and Gasoline Vapors in a Laval Nozzle

“…In this study, to calculate the high-temperature oxidation of kerosene and gasoline in a supersonic direct-flow combustion chamber, kinetic models of combustion of the main reference fuels, n-decane and n-heptane, are used, respectively. Combustion of n-decane is described by a reduced kinetic mechanism [18], which includes 68 reactions and 44 components. The mechanism is based on the kinetic model of combustion of n-decane [37], supplemented by the initiating reactions of high-temperature decomposition of n-decane [33].…”

“…In this study, we study the possibility of stabilizing the detonation combustion of kerosene and gasoline vapors in a supersonic air flow entering an axisymmetric convergent-divergent nozzle with a central body of the CC and CCC. The processes of ignition and combustion of kerosene vapors is modeled based on a relatively simple reduced kinetic mechanism proposed in [18], which includes 68 reactions and 44 components. In the case of gasoline, a reduced kinetic scheme consisting of 44 reactions and 33 components, which is discussed in the next section, is used.…”