| 제목 |
OH-RADICAL BEHAVIOR OF UNSTEADY LIFTED FLAME BASED ON INSTANTANEOUS CHANGE OF THE EQUIVALENCE RATIO |
| 분야 |
Heat Transfer, Fluid and Thermal Engineering |
| 언어 |
English |
| 저자 |
S. H. JUN(Tokushima University), T. K. KIM(Keimyung University), J. Y. JANG(Keimyung Universtiy), Y. KIDOGUCHI(Tokushima University) |
| Key Words |
Lifted flame, Premixed flame, Triple flame, Unsteady flame, OH-PLIF |
| 초록 |
In an earlier study, the current authors showed that an unsteady-state lifted flame generated by an equivalence ratio conversion system for a given fuel, was similar to a steady-state lifted flame in terms of the change characteristics from a premixed flame to a critical flame and then to a triple flame with a diffusion flame positioned in the middle according to the concentration difference. Therefore, this study used an OH-PLIF method to investigate the characteristics of a steady-state lifted flame and an unsteady-state lifted flame created under conditions identical to the flames in the preceding study. PLIF (Planar laser induced fluorescence) is practically effective for visualizing the concentration fields within a flame. The resulting OH-radical measurements showed that an unsteady-state lifted flame created under the specific conditions used in this study showed similar tendencies in terms of OH-radical distribution, fluorescence intensity, and liftoff height, to a steady-state lifted flame, thereby confirming that the behavior of an unsteady-state lifted flame can be effectively predicted based on the behavior of a steady-state lifted flame. |
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