ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Three-dimensional detonation cellular structures in rectangular ducts using an improved CESE scheme |
Yang Shen(沈洋)1, Hua Shen(申华)2, Kai-Xin Liu(刘凯欣)1, Pu Chen(陈 璞)1, De-Liang Zhang(张德良)3 |
1 State Key Laboratory for Turbulence and Complex System, College of Engineering, Peking University, Beijing 100871, China; 2 Department of Applied Mathematics and Computational Science, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia; 3 State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract The three-dimensional premixed H2-O2 detonation propagation in rectangular ducts is simulated using an in-house parallel detonation code based on the second-order space-time conservation element and solution element (CE/SE) scheme. The simulation reproduces three typical cellular structures by setting appropriate cross-sectional size and initial perturbation in square tubes. As the cross-sectional size decreases, critical cellular structures transforming the rectangular or diagonal mode into the spinning mode are obtained and discussed in the perspective of phase variation as well as decreasing of triple point lines. Furthermore, multiple cellular structures are observed through examples with typical aspect ratios. Utilizing the visualization of detailed three-dimensional structures, their formation mechanism is further analyzed.
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Received: 30 March 2016
Revised: 31 May 2016
Accepted manuscript online:
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PACS:
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47.40.Rs
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(Detonation waves)
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82.33.Vx
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(Reactions in flames, combustion, and explosions)
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02.60.Cb
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(Numerical simulation; solution of equations)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10732010 and 10972010). |
Corresponding Authors:
De-Liang Zhang
E-mail: dlzhang@imech.ac.cn
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Cite this article:
Yang Shen(沈洋), Hua Shen(申华), Kai-Xin Liu(刘凯欣), Pu Chen(陈 璞), De-Liang Zhang(张德良) Three-dimensional detonation cellular structures in rectangular ducts using an improved CESE scheme 2016 Chin. Phys. B 25 114702
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