| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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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
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| Cite this article: |
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Wen-Hu Han, Jin Huang, Ning Du et al 2017 Chin. Phys. Lett. 34 054701 |
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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.
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Received: 18 November 2016
Published: 29 April 2017
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| PACS: |
47.40.Rs
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(Detonation waves)
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47.85.Gj
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(Aerodynamics)
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82.40.Fp
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(Shock wave initiated reactions, high-pressure chemistry)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 91541206 and 91441131. |
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