Effects of Copper Foam Wall/Obstacles on the Deflagration-to-Detonation Transition

被引:1
|
作者
Jiang, Yuguang [1 ]
Kang, Jianing [1 ]
Lin, Yong [1 ]
Yang, Shaoxiong [1 ]
Zhang, Jin [1 ]
Fan, Wei [1 ]
机构
[1] Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Deflagration to Detonation Transition; Pulse Detonation Engine; Detonation Waves; Combustion Chambers; Turbulence Intensity; Data Acquisition; NASA; Copper foam; Detonation; Deflagration-to-Detonation transition;
D O I
10.2514/1.J063410
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
To investigate the process of deflagration-to-detonation transition (DDT) of the copper foam wall in the pulse detonation engine, detonation combustion experiments were carried out using ethylene and oxygen-enriched air (oxygen concentration: 40%) as fuel and oxidant. The effects of copper foam pore size, thickness, installation length, and structure on the flame acceleration were studied experimentally, as were the effects of blockage ratio and mixture equivalence ratio. The results show that among the four pore sizes selected, the 10 PPI case produces the fastest flame development on the porous flat wall. For conditions with successful detonation, the 10 PPI case reduces the DDT distance and time by 34.97 and 42.57%, respectively, compared with the 40 PPI case. Regarding the installation length of copper foam, it is found that copper foam with a large pore size (10 PPI) and a short installation length achieves stable detonation. The general structure of copper foam was also analyzed, including the porous flat wall, porous obstacle, and solid obstacle with the same installation length. These three structures effectively accelerate the initiation of detonation. Particularly, porous obstacles show more pronounced effects on flame acceleration than the commonly used solid obstacles. These results are instructive for optimizing the short-distance ignition ability of pulsed detonation engines.
引用
收藏
页码:3167 / 3179
页数:13
相关论文
共 50 条
  • [21] Deflagration-to-detonation transition in Bullseye powder
    Miner, T.
    Dalton, D.
    Romero, D.
    Heine, M.
    Gorby, A.
    Todd, S.
    Asay, B.
    SHOCK WAVES, 2019, 29 (07) : 905 - 911
  • [22] Smoked Foil on Deflagration-to-Detonation Transition
    Wen, C. S.
    Chung, K. M.
    Hsu, Y. C.
    Lu, F. K.
    JOURNAL OF PROPULSION AND POWER, 2015, 31 (03) : 968 - 969
  • [23] Deflagration-to-detonation transition in thermonuclear supernovae
    Khokhlov, AM
    Oran, ES
    Wheeler, JC
    ASTROPHYSICAL JOURNAL, 1997, 478 (02): : 678 - 688
  • [24] Mechanism of deflagration-to-detonation transitions above repeated obstacles
    Obara, T.
    Kobayashi, T.
    Ohyagi, S.
    SHOCK WAVES, 2012, 22 (06) : 627 - 639
  • [25] Mechanism of deflagration-to-detonation transitions above repeated obstacles
    T. Obara
    T. Kobayashi
    S. Ohyagi
    Shock Waves, 2012, 22 : 627 - 639
  • [26] Deflagration-to-detonation transition in gases in tubes with cavities
    Smirnov N.N.
    Nikitin V.F.
    Phylippov Yu.G.
    Journal of Engineering Physics and Thermophysics, 2010, 83 (06) : 1287 - 1316
  • [27] Numerical study on flame acceleration and deflagration-to-detonation transition: Spatial distribution of solid obstacles
    Wang, Jiabao
    Li, Tong
    Ji, Shaoqiu
    Nie, Yunxi
    Jiang, Xi Zhuo
    Zhu, Yuejin
    PHYSICS OF FLUIDS, 2024, 36 (08)
  • [28] Deflagration-to-detonation transition in pipes: The analytical theory
    Bang, Boo-Hyoung
    Ahn, Chan-Sol
    Kim, Young-Tae
    Lee, Myung-Ho
    Kim, Min-Woo
    Yarin, Alexander L.
    Yoon, Sam S.
    APPLIED MATHEMATICAL MODELLING, 2019, 66 : 332 - 343
  • [29] Deflagration-to-detonation transition(DDT) in a heterogeneous explosive
    Wang, Ping
    Luo, Yuan
    Jia, Quansheng
    Chen, Fumei
    Proceedings of the International Pyrotechnics Seminar, 1991, 2
  • [30] A theory of deflagration-to-detonation transition in unconfined flames
    Khokhlov, AM
    Oran, ES
    Wheeler, JC
    COMBUSTION AND FLAME, 1997, 108 (04) : 503 - 517