Efficiency of Detonation Combustion of Kerosene Vapor in Nozzles of Various Configurations

• Published in: High temperature Vol. 60; no. Suppl 1; pp. S52 - S58
• Main Authors: Tunik, Yu. V., Gerasimov, G. Ya, Levashov, V. Yu, Assad, M. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2022; Springer Nature B.V
• Subjects: Air flow; Atoms and Molecules in Strong Fields; Axisymmetric flow; Classical and Continuum Physics; Combustion; Computational fluid dynamics; Configurations; Convergence; Convergent-divergent nozzles; Detonation; Euler-Lagrange equation; Heat and Mass Transfer and Physical Gasdynamics; Industrial Chemistry/Chemical Engineering; Kerosene; Laser Matter Interaction; Mach number; Materials Science; Physical Chemistry; Physics; Physics and Astronomy; Reaction kinetics; Specific impulse; Vapors
• ISSN: 0018-151X; 1608-3156
• DOI: 10.1134/S0018151X21040209

Using the methods of computational fluid dynamics, a comparative analysis of the stabilization of the detonation combustion of kerosene vapor in a supersonic air flow entering an expanding and convergent-divergent axisymmetric nozzle with a central body is carried out. The mathematical model is built based on unsteady two-dimensional Euler equations for the axisymmetric flow of a multicomponent reacting gas and a reduced detailed scheme of the chemical kinetics of ignition and combustion of a kerosene mixture. The calculations use a modification of the numerical scheme of S.K. Godunov of the second order of approximation of smooth solutions in space variables. The configurations of the nozzle channels which stabilize the de-tonation combustion of kerosene vapor are determined. Under conditions of the surface atmosphere, the efficiency of detonation combustion of kerosene in an expanding nozzle and a convergent-divergent nozzle is compared in terms of the specific impulse and thrust at Mach numbers of the oncoming flow of 7 and 9.