Numerical simulation of detonation ignition and propagation progress by CE/SE method

A space-time conservation element and solution element method (CE/SE) was used to simulate the formation and propagation process of one-dimensional detonation; also the detonation mechanism and influential factors to DDT (deflagration to detonation transition) were analyzed. Shock ignition method and hotspots ignition method, corresponding to SDT (shock to detonation transition) and DDT respectively, were employed. For the hotspot ignition, the initial pressure was 1 atm and temperature was linear or step-wise. Implicit trapezoidal technique was employed to handle stiff source term. Results show that the shock ignition and hotspot ignition are of different detonation mechanisms and DDT is affected by parameter variations in ignition zone. The results will offer reference to study of detonation ignition and DDT process.