中国物理B ›› 2020, Vol. 29 ›› Issue (6): 60503-060503.doi: 10.1088/1674-1056/ab81f5

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Effect of transversal concentration gradient on H2-O2 cellular detonation

Cheng Wang(王成), Yi-Xuan Wu(吴易烜), Jin Huang(黄金), Wen-Hu Han(韩文虎), Qing-Guan Song(宋清官)   

  1. 1 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
    2 Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2019-11-18 修回日期:2020-03-09 出版日期:2020-06-05 发布日期:2020-06-05
  • 通讯作者: Jin Huang E-mail:huangjin@bit.edu.cn
  • 基金资助:

    Project supported by the Natural National Science Foundation of China (Grant Nos. 11972090, 11732003, and U1830139), the Beijing Natural Science Foundation, China (Grant No. 8182050), and the National Key Research and Development Program of China (Grant No. 2017YFC0804700).

Effect of transversal concentration gradient on H2-O2 cellular detonation

Cheng Wang(王成)1, Yi-Xuan Wu(吴易烜)1, Jin Huang(黄金)1, Wen-Hu Han(韩文虎)1, Qing-Guan Song(宋清官)2   

  1. 1 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;
    2 Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2019-11-18 Revised:2020-03-09 Online:2020-06-05 Published:2020-06-05
  • Contact: Jin Huang E-mail:huangjin@bit.edu.cn
  • Supported by:

    Project supported by the Natural National Science Foundation of China (Grant Nos. 11972090, 11732003, and U1830139), the Beijing Natural Science Foundation, China (Grant No. 8182050), and the National Key Research and Development Program of China (Grant No. 2017YFC0804700).

摘要:

A two-dimensional detonation in H2-O2 system is simulated by a high-resolution code based on the fifth-order weighted essentially non-oscillatory (WENO) scheme in the spatial discretization and the 3th-order additive Runge-Kutta schemes in the time discretization, by using a detailed chemical model. The effect of a concentration gradient on cellular detonation is investigated. The results show that with the increase of the concentration gradient, the cell instability of detonation increases and gives rise to the oscillation of average detonation velocity. After a long time, for the case of the lower gradient the detonation can be sustained, with the multi-head mode and single-head mode alternating, while for the higher gradient it propagates with a single-head mode.

关键词: detonation, detailed reaction, WENO, additive Runge-Kutta (ARK), concentration gradient

Abstract:

A two-dimensional detonation in H2-O2 system is simulated by a high-resolution code based on the fifth-order weighted essentially non-oscillatory (WENO) scheme in the spatial discretization and the 3th-order additive Runge-Kutta schemes in the time discretization, by using a detailed chemical model. The effect of a concentration gradient on cellular detonation is investigated. The results show that with the increase of the concentration gradient, the cell instability of detonation increases and gives rise to the oscillation of average detonation velocity. After a long time, for the case of the lower gradient the detonation can be sustained, with the multi-head mode and single-head mode alternating, while for the higher gradient it propagates with a single-head mode.

Key words: detonation, detailed reaction, WENO, additive Runge-Kutta (ARK), concentration gradient

中图分类号:  (Thermodynamics)

  • 05.70.-a
45.20.dh (Energy conservation) 47.10.ad (Navier-Stokes equations) 47.40.Rs (Detonation waves)