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학술대회자료
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한국연소학회 KOSCO SYMPOSIUM 논문집 제37회 KOSCO SYMPOSIUM 논문집
발행연도
2008.12
수록면
298 - 304 (7page)

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The stabilization characteristics of premixed laminar jet flames have been investigated experimentally for stoichiometric methane-air mixture by varying AC electric fields applied to the nozzle with a single-electrode configuration. The detachment velocities either at blowoff or partial-detachment have been measured by varying the applied voltage and frequency of AC. The result showed that the detachment velocity was increased with the applied AC electric fields, such that the flame was attached to the nozzle exit even over the blowoff velocity without having electric fields. There existed four distinct regimes depending on the applied AC voltage and frequency. In the regime of low electric field intensity, the threshold condition of AC electric fields was observed below which the effect of electric fields on the detachment velocity is minimal. In the moderate voltage, the detachment velocity increased linearly with the applied voltage and nonlinearly with the AC frequency. In the high voltage regime, two different regimes depending on the AC frequency were observed. For relatively low frequency, a half frequency of the flame base oscillation as well as the original frequency of applied AC electric fields was induced and the change of detachment velocity was insensitive to the variation of applied voltage. At high frequency regime, the stability of flame was significantly affected by the generation of streamers and the detachment velocity decreased with the applied voltage.

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ABSTRACT
1. 서론
2. 실험 장치 및 방법
3. 결과 및 토의
4. 결론
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