Volume 18 No. 1
Apr.  2015
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Two-Dimensional Simulation of Transient Detonation Process for H2-O2-N2 Mixture

  • Corresponding author: DONG Gang; 
  • Received Date: 2003-05-06
    Accepted Date: 2003-07-21
  • By solving the two-dimensional Euler equations coupled with the chemistry, a numerical simulation of transient detonation process induced by flame for H2-O2-N2 mixture was performed, and a detailed chemical mechanism for H2-O2-N2 system, which included 19 element reactions and 9 species, was involved. A splitting operator method was used to treat separately the hydrodynamical process and chemical process in the detonation simulation. The TVD scheme was used to capture the detonation wave and the Gear algorithm was used to solve the chemical reaction. The calculated results show that combustion rate of flame can be accelerated and lead to the occurrence of detonation when the initial mole fraction ratio of the mixture is H2∶O2∶N2=0.4∶0.4∶0.2 and the initial nondimensional temperature is T/T0=5.3, the detonation wave can be propagated steadily with the detonation velocity of 2 300 m/s. The reflection of the detonation wave can be observed. In addition, the variations of species concentrations and temperature behind the detonation wave were also discussed in order to understand the inherent structure behind the detonation wave.
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  • [1] He L. Contribution of Thermal Conduction Effect to Transition from Self-Explosion to Detonation [J]. Combustion Science and Technology, 1994, 96: 33-45.
    [2] Smirnov N N, Panfilov I I. Deflagration to Detonation Transition in Combustible Gas Mixtrues [J]. Combustion and Flame, 1995, 101: 91-100.
    [3] Fan B C, Xing X J, Li H Z. Explosion Induced by a Hot Reactive Gas Pocket and Its Suppression [J]. ACTA Armamentarii, 2001, 22(2): 195-198. (in Chinese)范宝春, 邢晓江, 李鸿志. 可燃介质中高温火团诱导的爆炸及其抑制 [J]. 兵工学报, 2001, 22(2): 195-198.
    [4] Kee R J, Rupley F M, Miller J A. The CHEMKIN Thermodynamic Data Base [R]. SAND87-8215B, 1990.
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    [6] Gordon S, Mcbride B J. Computer Program for Calculation of Complex Chemical Equilibrium Compositions, Rocket Performance Incident and Reflected Shocks, and Chapman-Jouguet Detonations [R]. NASA-SP-273, 1971.
    [7] Fan B C, Jiang X H, Li H Z. Three Dimensional Numerical Simulation of Explosion Induced by Obstacles in CH4-O2 Mixture [J]. Journal of China Coal Society, 2002, 27(4): 371-373. (in Chinese)范宝春, 姜孝海, 李鸿志. 障碍物导致甲烷-氧气爆炸的三维数值模拟 [J]. 煤炭学报, 2002, 27(4): 371-373.
    [8] Kim H, Anderson D A, Lu F K, et al. Numerical Simulation of Transient Combustion Process in Pulse Detonation Engine [R]. AIAA 2000-0887, 2000.
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Two-Dimensional Simulation of Transient Detonation Process for H2-O2-N2 Mixture

    Corresponding author: DONG Gang; 
  • 1. Institute of Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Abstract: By solving the two-dimensional Euler equations coupled with the chemistry, a numerical simulation of transient detonation process induced by flame for H2-O2-N2 mixture was performed, and a detailed chemical mechanism for H2-O2-N2 system, which included 19 element reactions and 9 species, was involved. A splitting operator method was used to treat separately the hydrodynamical process and chemical process in the detonation simulation. The TVD scheme was used to capture the detonation wave and the Gear algorithm was used to solve the chemical reaction. The calculated results show that combustion rate of flame can be accelerated and lead to the occurrence of detonation when the initial mole fraction ratio of the mixture is H2∶O2∶N2=0.4∶0.4∶0.2 and the initial nondimensional temperature is T/T0=5.3, the detonation wave can be propagated steadily with the detonation velocity of 2 300 m/s. The reflection of the detonation wave can be observed. In addition, the variations of species concentrations and temperature behind the detonation wave were also discussed in order to understand the inherent structure behind the detonation wave.

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