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선회난류확산 화염에 관한 실험적 연구
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  • 선회난류확산 화염에 관한 실험적 연구
  • An Experimental Study on Swirling Turbulent Diffusion Flames
저자명
정진도
간행물명
환경에너지공학KCI후보
권/호정보
2005년|2권 1호(통권3호)|pp.63-70 (8 pages)
발행정보
한국환경에너지공학회|한국
파일정보
정기간행물|KOR|
PDF텍스트(0.4MB)
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국문초록

영문초록

The continuous flow type combustor, commonly used in gas turbine, boiler and industrial furnaces, requires the stabilization of high intensity combustion with higher combustion efficiency and reduce of harmful emission gas. Because of various geometrical types of combustor, supplying method of the mixture and combustion phenomena are very complex, theoretical analysis is also very difficult. Therefore, this study has been executed by experimental methods. Experiments using a model combustor were made at various equivalence ratios, swirling vane angles and swirl heights. On the basis of the experimental results, the author has investigated flame lengths, stability of flame and radial distributions of temperature. The results are as follows; Combustor with cylinder, Swirl effect is increasing than without cylinder, but combustion efficiency is decreasing on account of secondary air shortage. In cases with and without cylinder, close flame is long, also with increasing the Reynolds number and swirl number, the mixture of air and fuel is promoted and therefore, flame length becomes short. In spite of weak swirl (θ= 30), swirl is placed at 250mm, temperature gradient is appeared, so I think that a little recirculation zone exists. With strong swirl (θ=45, 60), flame along the fuel tube is formed, it becomes stable in this experiment mixing process is promoted due to the existence of recirculation zone. As a result of measuring temperature, for the sake of optimum combustion condition, swirl height is adequate to 200-250mm, with decreasing Equivalence ratio, combustion field becomes narrow.

목차

1. 서론
2. 실험장치 및 방법
3. 실험결과 및 고찰
4. 결론
참고문헌