Volume 30 Issue 1
Jan.  2015
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ZHAO Wei, HAN Qi-xiang, WANG Jia-hua, ZHANG Gui-hua. Numerical study on effect of hot jet ignition on flame acceleration and detonation initiation in detonation tube[J]. Journal of Aerospace Power, 2015, 30(1): 38-45. doi: 10.13224/j.cnki.jasp.2015.01.006
Citation: ZHAO Wei, HAN Qi-xiang, WANG Jia-hua, ZHANG Gui-hua. Numerical study on effect of hot jet ignition on flame acceleration and detonation initiation in detonation tube[J]. Journal of Aerospace Power, 2015, 30(1): 38-45. doi: 10.13224/j.cnki.jasp.2015.01.006

Numerical study on effect of hot jet ignition on flame acceleration and detonation initiation in detonation tube

doi: 10.13224/j.cnki.jasp.2015.01.006
  • Received Date: 2013-09-12
  • Publish Date: 2015-01-28
  • To study the effect of hot jet ignition on flame acceleration and detonation initiation in detonation tube, 2-D numerical simulations with propane mechanism including 34 reaction steps among 26 chemical species were performed, and the flame propagation law in detonation tube and deflagration to detonation transition (DDT) time and distance were obtained with 5 different configurations of hot jet sub-chamber. The results show that turbulence plays a key role during flame acceleration process in detonation tube, and the shock/flame interaction dominates the detonation initiation. According to the definition of DDT process, the DDT time is between 1.4-2.0ms, and the minimum value is obtained in the hot jet sub-chamber with 150mm length and 8mm in orifice diameter. The hot jet sub-chamber length and orifice diameter exert a minor effect on the DDT distance.

     

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