| Microstructure of premixed propane/air flame in the transition from laminar to turbulent combustion |
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| 引用本文： | CHEN XianFeng SUN JinHua LIU Yi LIU XuanYa CHEN SiNing LU ShouXiang. Microstructure of premixed propane/air flame in the transition from laminar to turbulent combustion[J]. 科学通报(英文版), 2007, 52(5): 685-691. DOI: 10.1007/s11434-007-0061-z |
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| 作者姓名： | CHEN XianFeng SUN JinHua LIU Yi LIU XuanYa CHEN SiNing LU ShouXiang |
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| 作者单位： | State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No. 50576093） and the Key Project of NSFC （Grant No. 50536030） |
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| 摘 要： | In order to explore the flame structure and propagation behavior of premixed propane/air in the transi-tion from laminar to turbulent combustion, the high speed camera and Schlieren images methods were used to record the photograph of flame propagation process in a semi-vented pipe. Meanwhile, the super-thin thermocouple and ionization current probe methods were applied to detect the temperature distribution and reaction intensity of combustion reaction. The characteristics of propane/air flame propagation and microstructure were analyzed in detail by the experimental results coupled with chemical reaction thermodynamics. In the test, the particular tulip flame behavior and the formation process in the laminar-turbulent transition were disclosed clearly. From the Schlieren images and iron current results, one conclusion can be drawn that the small-scale turbulent combustion also appeared in laminar flame, which made little influence on the flame shape, but increased the flame thickness obviously.
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| 关 键 词： | 丙烷/空气预混火焰 火焰结构 层流焰 紊流燃烧 过渡 可燃气体爆炸 |
| 收稿时间： | 2006-06-14 |
| 修稿时间： | 2006-06-142006-10-13 |
Microstructure of premixed propane/air flame in the transition from laminar to turbulent combustion |
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| Chen XianFeng,Sun JinHua,Liu Yi,Liu XuanYa,Chen SiNing,Lu ShouXiang. Microstructure of premixed propane/air flame in the transition from laminar to turbulent combustion[J]. Chinese science bulletin, 2007, 52(5): 685-691. DOI: 10.1007/s11434-007-0061-z |
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| Authors: | Chen XianFeng Sun JinHua Liu Yi Liu XuanYa Chen SiNing Lu ShouXiang |
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| Affiliation: | (1) State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, China |
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| Abstract: | In order to explore the flame structure and propagation behavior of premixed propane/air in the transi-tion from laminar to turbulent combustion, the high speed camera and Schlieren images methods were used to record the photograph of flame propagation process in a semi-vented pipe. Meanwhile, the super-thin thermocouple and ionization current probe methods were applied to detect the temperature distribution and reaction intensity of combustion reaction. The characteristics of propane/air flame propagation and microstructure were analyzed in detail by the experimental results coupled with chemical reaction thermodynamics. In the test, the particular tulip flame behavior and the formation process in the laminar-turbulent transition were disclosed clearly. From the Schlieren images and iron current results, one conclusion can be drawn that the small-scale turbulent combustion also appeared in laminar flame, which made little influence on the flame shape, but increased the flame thickness obviously. |
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| Keywords: | premixed flame flame structure Schlieren image laminar-turbulent transition |
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