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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제9권 제4호
발행연도
2001.7
수록면
77 - 84 (8page)

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초록· 키워드

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Measurements of local CO, CO₂, 0₂, N₂, C₃H_8, NOx concentrations and flame temperature are made for partially premixed flame with and without acoustic excitation. The CO, CO₂, 0₂, N₂, and C3H_8 concentrations are determined by thermal conductivity detection (Gas-chromatograph) and NOx concentrations are determined by chemiluminescent detection (NOx analyser). To measure local sample concentration, sampling probe was made by quartz with inlet diameter of O.25mm. In the case of excitation, the visual shape of the flame is changed from laminar flame to turbulent-like flame. The flame length is also reduced, and the flame width becomes broad. In the observation of emission concentration without acoustic excitation, meanwhile, the CO₂ and NOx concentrations peak at flame front where the mixture meets with surrounding air, and the CO concentration is increasing at maximum position of CO₂ concentration and peaks at the centerline of the burner. In the case of acoustic excitation, the CO₂ concentration is widely occurred at nozzle of the burner and is higher relative to unexcitation. The CO concentration is much reduced, but NOx concentration is more increasing. And flame temperature is higher relative to unexcitation. These are caused by enhancing of mixing with surrounding air due to excitation. However, in the case of acoustic excitation, the total NOx concentration is reduced because of the shortened flame length which affects residence time.

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ABSTRACT

1.서론

2.시험장치 및 방법

3.실험결과 및 토의

4.결론

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