Theoretical Study on the Deflagration to Detonation Transition Process

Abstract

Detonation is a fast and efficient form of energy transfer. The energy density of detonation wave could reach 10W/cm, which is quite destructive. Thus, detonation has great application potential in hypersonic propulsion. Under different ignition conditions, detonation wave initiation can be divided into direct initiation and deflagration-to-detonation transition(DDT). DDT process is a research hotspot in the field of detonation at present. It is a complex non-linear physical process which involves shock wave mechanics, thermodynamics, chemical reaction kinetics, etc. To clarify the physical mechanism of DDT process and predict the critical condition of DDT accurately is of great significance to understand detonation phenomena and to prevent production accidents. In this paper, the quantitative criteria of DDT is given and a series of experimental results are compared.