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

摘要： 运用时空守恒元和解元(CE/SE)法模拟爆震波由热点触发的过程,分析通过热点触发爆震波的机理以及热点触发爆震的影响因素。数值研究表明,热点内部均匀温度分布和线性温度分布有着不同的加速机理。触发爆震波过程受到热点区域大小、形状及温度分布等因素的影响,半球形的热点形状最易起爆；热点区域越大,温度分布线性化越高,越容易形成爆震。 

关键词: 热点;爆震波;CE/SE法;数值模拟