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Volume 36 Issue 6
Dec 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(6): 062301.
PENG Ao, ZHANG Jingwen, CHEN Xianfeng, SUN Xuxu. A Numerical Study on the Effect of Ignition Pattern on Wavelet Features in Rotating Detonation Waves[J]. Chinese Journal of High Pressure Physics, 2022, 36(6): 062301. doi: 10.11858/gywlxb.20220593
Citation: PENG Ao, ZHANG Jingwen, CHEN Xianfeng, SUN Xuxu. A Numerical Study on the Effect of Ignition Pattern on Wavelet Features in Rotating Detonation Waves[J]. Chinese Journal of High Pressure Physics, 2022, 36(6): 062301. doi: 10.11858/gywlxb.20220593
shu

A Numerical Study on the Effect of Ignition Pattern on Wavelet Features in Rotating Detonation Waves

doi: 10.11858/gywlxb.20220593

  • School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan 430081, Hubei, China

Funds:  National Key R&D Program of China (2021YFB4000901); Fundamental Research Funds for the Central Universities (223161001); Opening Fund of the Key Laboratory of Civil Aviation Thermal Disaster Prevention and Emergency of Civil Aviation University of China (RZH2021-KF-05); Opening Fund of the State Key Laboratory of Fire Science of University of Science and Technology of China (HZ2022-KF-09)
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  • Author Bio:

    PENG Ao (1999－), male, bachelor, major in high pressure behavior of gas explosion. E-mail: 317038@whut.edu.cn

  • Corresponding author: SUN Xuxu (1994－), male, doctor, associate professor, major in high pressure behavior of gas explosion. E-mail: xuxusun@whut.edu.cn
  • Received Date: 23 May 2022
  • Rev Recd Date: 06 Jun 2022
  • Accepted Date: 06 Jun 2022
    • Available Online: 21 Oct 2022
  • Issue Publish Date: 05 Dec 2022
    Abstract
  • In this study, the effect of ignition pattern on the wavelet features of rotating detonation waves (RDWs) is numerically investigated with Euler equations and two-step induction-reaction model. The influences of the size, the number and the spacing of the ignition zone were considered. The theoretical Chapman-Jouguet (C-J) detonation wave was used as the ignition zone, and different ignition patterns were obtained by changing the size of the C-J detonation wave. The numerical results indicate that the wavelet features of rotating detonation waves closely depend on the ignition zone size. Only the two-wave and the three-wave modes are observed for the single ignition zone with various sizes, and the relation between the quantity of RDWs and the ignition size is non-linear. For the single ignition zone with the same width, the occurrence probability of the two-wave mode is approximately greater than 80%, while the three-wave mode is a completely random phenomenon. The formation mechanisms of the multiple-wave modes can be summarized as follows: (1) the first RDW is directly produced from the initial C-J detonation wave near the top of the combustor; (2) the subsequent RDW is induced by the interaction between the compressed wave produced by the initial C-J detonation and the jet flow from the micro-nozzles. The quantity of RDWs increases with the quantity or the spacing of ignition zone, but their relations are both non-linear.

     

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