Numerical investigation on detonation cell evolution in a channel with area-changing cross section

Abstract

The two-dimensional cellular detonation propagating in a channel with areachanging cross section was numerically simulated with the dispersion-controlled dissipative scheme and a detailed chemical reaction model. Effects of the flow expansion and compression on the cellular detonation cell were investigated to illustrate the mechanism of the transverse wave development and the cellular detonation cell evolution. By examining gas composition variations behind the leading shock, the chemical reaction rate, the reaction zone length, and thermodynamic parameters, two kinds of the abnormal detonation waves were identified. To explore their development mechanism, chemical reactions, reflected shocks and rarefaction waves were discussed, which interact with each other and affect the cellular detonation in different ways. detonation cells, transverse waves, detailed chemical reaction model, numerical simulation

The Influence of Pipe Bending Curvature on H2-O2 Gaseous Detonation Wave Front

“…Gaseous detonation technology has a good application prospect in engine [2][3][4][5][6]. Most of the experimental studies and numerical simulation in the gaseous detonation wave focus on cell structure evolution and the influence of initial conditions in a straight pipe [7][8][9][10][11][12][13][14].…”