关键词: 热点;爆震波;CE/SE法;数值模拟

Abstract: A space-time conservation element and solution element method(CE/SE) was used to simulate the formation and propagation process of two-dimensional detonation ignited by hotspot ,and analyze the detonation mechanism and the factors to hotspot ignition. For the hotspot ignition, the initial pressure was 0.1MPa and temperature was different. Implicit trapezoidal technique was established to handle stiff source term. Results show that the uniform temperature and linear temperature distribution of hotspot have different detonation mechanism, which is effected by the varied parameters in ignition zone. The large region size , the linear temperature distribution or the shape of hemisphere for the hotspot could induce detonation easily. The results offer reference to study detonation ignition. 

Key words: Hotspot; Detonation; CE/SE method; Numerical simulation