填 充 流 量 和 当 量 比 对 障 碍 物 管 道 内火 焰 加 速 的 影 响

Haotian Zhang, Yonghui Zhang, Pengfei Ma, Yun Wang, Wei Fan

科研成果: 期刊稿件文章同行评审

摘要

The propagation characteristics of flame in an obstructed tube are crucial to the transition from slow combustion to detonation. To explore the influence of filling flow rate and equivalence ratio on flame acceleration in a rectangular obstructed tube,ethylene was used as fuel,and air was used as oxidant. Based on high-speed schlieren technology and chemiluminescence technology,schlieren images and flame chemiluminescence images with different filling flow rates and equivalence ratios were obtained through experimental research. The experimental results show that the flame propagation in a rectangular channel with obstacles can be divided into two stages:slow acceleration and oscillating acceleration. Moderately increasing the filling flow rate will accelerate the transition from laminar flame to turbulent flame,and significantly promote the flame acceleration process. However,further increasing the filling flow rate will not continuously accelerate the flame propagation,and the maximum flame propagation speed fluctuates in the range of 650 m/s to 700 m/s. When the equivalence ratio of reactants is 1,the flame acceleration effect is obviously better than that of lean or rich conditions. As the filling flow rate increases,the effect of equivalence ratio on flame acceleration gradually weakens.

投稿的翻译标题Effects of filling flow rate and equivalence ratio on flame acceleration in an obstacle channel
源语言繁体中文
文章编号130940
期刊Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica
46
4
DOI
出版状态已出版 - 25 2月 2025

关键词

  • detonation
  • equivalence ratio
  • filling flow rate
  • flame acceleration
  • obstacle channel

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