The deflagration to detonation transition model was established based on AUTODYN/ANSYS to simulate the process of DDT and provide a basis for the safety analysis of high-energy propellant. The process of DDT was numerically simulated by the ignition and growth reactive flow model and ALE method. The detonation pressure, detonation velocity, the run distance and time to detonation were calculated. The simulating results indicate that the detonation velocity is about 2899m/s, the run distance to detonation is about 138.3mm when the density of propellant is 1860kg/m~3. The numerical results are in a good agreement with the experimental results.
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