Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air

J. Li, W. H. Lai, K. Chung, F. K. Lu

研究成果: Article同行評審

39 引文 斯高帕斯(Scopus)

摘要

Two sets of experiments were performed to achieve a strong overdriven state in a weaker mixture by propagating an overdriven detonation wave via a deflagration-to-detonation transition (DDT) process. First, preliminary experiments with a propane/oxygen mixture were used to evaluate the attenuation of the overdriven detonation wave in the DDT process. Next, experiments were performed wherein a propane/oxygen mixture was separated from a propane/air mixture by a thin diaphragm to observe the transmission of an overdriven detonation wave. Based on the characteristic relations, a simple wave intersection model was used to calculate the state of the transmitted detonation wave. The results showed that a rarefaction effect must be included to ensure that there is no overestimate of the post-transmission wave properties when the incident detonation wave is overdriven. The strength of the incident overdriven detonation wave plays an important role in the wave transmission process. The experimental results showed that a transmitted overdriven detonation wave occurs instantaneously with a strong incident overdriven detonation wave. The near-CJ state of the incident wave leads to a transmitted shock wave, and then the transition to the overdriven detonation wave occurs downstream. The attenuation process for the overdriven detonation wave decaying to a near-CJ state occurs in all tests. After the attenuation process, an unstable detonation wave was observed in most tests. This may be attributed to the increase in the cell width in the attenuation process that exceeds the detonability cell width limit.

原文English
頁(從 - 到)331-345
頁數15
期刊Combustion and Flame
154
發行號3
DOIs
出版狀態Published - 2008 8月

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 一般化學工程
  • 燃料技術
  • 能源工程與電力技術
  • 一般物理與天文學

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