Effect of Cellular Instability on the Initiation of Cylindrical Detonations
Wen-Hu Han1, Jin Huang2**, Ning Du1, Zai-Gang Liu1, Wen-Jun Kong1, Cheng Wang3
1Key Laboratory of Light-Duty Gas-Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190 2Beijing Priority Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124 3Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081
Abstract：The direct initiation of detonations in one-dimensional (1D) and two-dimensional (2D) cylindrical geometries is investigated through numerical simulations. In comparison of 1D and 2D simulations, it is found that cellular instability has a negative effect on the 2D initiation and makes it more difficult to initiate a sustaining 2D cylindrical detonation. This effect associates closely with the activation energy. For the lower activation energy, the 2D initiation of cylindrical detonations can be achieved through a subcritical initiation way. With increasing the activation energy, the 2D cylindrical detonation has increased difficulty in its initiation due to the presence of unreacted pockets behind the detonation front and usually requires rather larger source energy.
. [J]. 中国物理快报, 2017, 34(5): 54701-.
Wen-Hu Han, Jin Huang, Ning Du, Zai-Gang Liu, Wen-Jun Kong, Cheng Wang. Effect of Cellular Instability on the Initiation of Cylindrical Detonations. Chin. Phys. Lett., 2017, 34(5): 54701-.
2017, Vol. 34 
