采用一维分离两相流反应模型以及变步长跳步差分计算格式,模拟了固体推进剂的燃烧转爆轰过程。计算结果详细、合理地描述了推进剂在燃烧转爆轰过程中的流场分布情况。文中建立了确定诱导爆轰距离(L_(DDT)的方法,由该法所得L_(DDT)的值与实验值符合得较好,其误差小于15％。 One-dimensional separation two-phase flow reaction model and step-by-step jump differential calculation format were used to simulate the combustion to detonation process of solid propellant. The calculation results provide a detailed and reasonable description of the flow field of the propellant in the process of combustion, detonation and detonation. The method of determining induced detonation distance (DDT) was established in this paper. The value of DDT obtained by this method is in good agreement with the experimental data, and its error is less than 15%.