스파크점화직분식 CNG의 점화성 및 연소화염 특성에 대한 연구

황성일; 정성식; 염정국; 전병열; 이진현

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자료유형: 학술저널

저자정보: 황성일 (기아자동차 부산서비스센터) 정성식 (동아대학교 기계공학과) 염정국 (동아대학교 기계공학과) 전병열 (현대자동차 서부산서비스센터, 부산서비스센터) 이진현 (현대자동차 서부산서비스센터, 부산서비스센터)

저널정보: 한국분무공학회 한국액체미립화학회지 한국액체미립화학회지 제21권 제1호

발행연도: 2016.1

수록면: 37 - 46 (10page)

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For the SI engines, at only full load, the pumping loss has a negligible effect, while at part load conditions, the pumping loss increases. To avoid the pumping loss, the spark-ignited engines are designed to inject gasoline directly into the combustion chamber. In the spark-ignited direct-injection engines, ignition probability is important for successful combustion and the flame propagation characteristics are also different from that of pre-mixed combustion. In this paper, a visualization experiment system is designed to study the ignition probability and combustion flame characteristics of spark-ignited direct-injection CNG fuel. The visualization system is composed of a combustion chamber, fuel supply system, air supply system, electronic control system and data acquisition system. It is found that ambient pressure, ambient temperature and ambient air flow velocity are important parameters which affect the ignition probability of CNG-air mixture and flame propagation characteristics and the injected CNG fuel can be ignited directly by a spark-plug under proper ambient conditions. For all cases of successful ignition, the flame propagation images were digitally recorded with an intensified CCD camera and the flame propagation characteristics were analyzed.

#압축천연가스 #점화성 #가시화 시스템 #화염전파특성

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