Influence of equivalence ratio on flame acceleration and detonation transition of ethylene/oxygen mixture in a narrow channel

Hung Ping Chan, Wei Yen Su, Yi Chun Tseng, Ming Hsun Wu

研究成果: Paper

摘要

High-speed schlieren and chemiluminescence visualizations were utilized to resolve the influence of equivalence ratio () on the evolvements of reaction and shock waves in a transparent channel filled with ethylene/oxygen mixtures initially at ambient temperature and pressure. Equivalence ratios of the mixtures ranged from 0.5 to 1.6. Cross-section of the square channel was 1 mm × 1 mm, and the total length was 730 mm. Reaction propagation in = 0.5 mixture terminated with low-speed detonation, while the reaction fronts in other cases eventually propagate at near Chapman-Jouguet velocities. The timings of leading shock formation, shock cluster formation as well as detonation transition were the earliest in the = 1.3 mixture. Leading shock velocity and peak acceleration rate of reaction front were the highest for the mixture. Schlieren visualizations also showed that the shock cluster structures, emerged when the reaction wave propagating velocity exceeds 1100 m/s and before detonation transition, are identical to the pattern of a low-speed detonation wave front.

原文English
出版狀態Published - 2019 一月 1
事件12th Asia-Pacific Conference on Combustion, ASPACC 2019 - Fukuoka, Japan
持續時間: 2019 七月 12019 七月 5

Conference

Conference12th Asia-Pacific Conference on Combustion, ASPACC 2019
國家Japan
城市Fukuoka
期間19-07-0119-07-05

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Condensed Matter Physics

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  • 引用此

    Chan, H. P., Su, W. Y., Tseng, Y. C., & Wu, M. H. (2019). Influence of equivalence ratio on flame acceleration and detonation transition of ethylene/oxygen mixture in a narrow channel. 論文發表於 12th Asia-Pacific Conference on Combustion, ASPACC 2019, Fukuoka, Japan.