Numerical investigation on evolution of detonation diffraction in moving gas inside a T-shaped channel

Pan Zhen-hua; Fan Bao-chun; Gui Ming-yue

doi:10.11883/1001-1455(2014)06-0709-07

Volume 34 Issue 6

Dec. 2014

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Pan Zhen-hua, Fan Bao-chun, Gui Ming-yue. Numerical investigation on evolution of detonation diffraction in moving gas inside a T-shaped channel[J]. Explosion And Shock Waves, 2014, 34(6): 709-715. doi: 10.11883/1001-1455(2014)06-0709-07

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Pan Zhen-hua, Fan Bao-chun, Gui Ming-yue. Numerical investigation on evolution of detonation diffraction in moving gas inside a T-shaped channel[J]. Explosion And Shock Waves, 2014, 34(6): 709-715. doi: 10.11883/1001-1455(2014)06-0709-07

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Numerical investigation on evolution of detonation diffraction in moving gas inside a T-shaped channel

doi: 10.11883/1001-1455(2014)06-0709-07

1.
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
2.
State Key Laboraty of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Funds: Supported bythe National Natural Science Foundationof China (51306073, 11202014)

More Information

Corresponding author: Fan Bao-chun, bcfan@mail.njust.edu.cn
Received Date: 2013-04-11
Rev Recd Date: 2013-09-23
Publish Date: 2014-11-25

Abstract

Abstract

Based on two-dimensional Euler equations associated with chemical reactions, gaseous detonation of 2H₂/O₂/Ar mixture propagating through a T-tube was investigated numerically.The second-order additive semi-implicit Runge-Kutta methods and the fifth-order weighted essentially non-oscillatory (WENO) scheme were used to discretize the time derivative term and the space derivative term, respectively.The nine-specie and 48-elementary-reaction model was applied to describe detonation chemical reaction processes.The distribution of pressure, temperature and H mass fraction as well as numerical cellular patterns were obtained.Results show that, in the flowing mixture, the wave surface has an oblique detonation structure on windward side, while the wave on downwind side has a structure of leading shock wave decoupled from the reaction zone which is the same as the structure of waves on both side in quiescent mixture.After undergoing a series mach reflection incident, waves eventually form detonation waves propagating to left and right.In the flowing system, the whole cellular structure takes shape markedly further downstream.The emergence of transverse detonation has a key role for detonation reinitiation.
- mechanics of explosion,
- detonation diffraction,
- WENO scheme,
- flowing system,
- transverse detonation,
- cellular structure

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References(18)

References

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