The specifics of the working process in a detonation chamber of complex configuration

Abstract

Most of the known numerical and experimental studies of the detonation process have been conducted for detonation chambers (DC) of simple configuration, which are cylinders of constant cross-section. Experimental studies of detonation in a chamber with variable cross-section were carried out to explore the possibility of enhancing the impulse and thermogasdynamic parameters of the detonation flow [1]. In a detonation chamber of complex spatial configuration, a non-stationary mode of propagation of detonation waves (DW) is realized, unlike the steady mode typical for the operation of a cylindrical chamber. Let us consider the results of mathematical modeling of detonation processes in an axisymmetric detonation chamber consisting of several sections [2]. Two cylindrical sections of smaller diameter were attached to the central (main) cylindrical section of the chamber of large diameter on both sides. The sections of large and small diameters were connected using transitional sections in the form of truncated cones. A stoichiometric hydrogen-air mixture was used as fuel at a pressure of 101.3 kPa and a temperature of 298 K. Detonation was initiated at the inlet or outlet cross-section of the chamber. The geometric configuration of the DC corresponds to the design scheme of a prospective multi-mode detonation engine intended for flight at hypersonic speeds in the upper layers of the atmosphere and in space [3].