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- 저자 : 양지웅(Jiwong Yang) (검색결과 1 건)
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피에조 인젝터 커먼레일 시스템을 이용한 DME 분사 시 분위기 조건 변화에 따른 분무특성에 관한 연구
이세준(Sejun Lee),양지웅(Jiwong Yang),임옥택(Ocktaeck Lim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
To understand DME characteristics including spray penetration length and spray angle at a real engine ambient condition, DME was injected into a high pressure chamber by a piezo injector common rail system. The pre-mixed gas combustion used N₂, O₂, and C₂H₂ was occurred in the high pressure chamber to modify the engine being operated. The piezo injector common rail system was applied to get steady injection pressure and rapid responsibility. Injection pressure was also varied to check a relation with spray characteristics. Using a direct photographing technique with high speed camera, every DME spray was able to be imaged. In the high pressure chamber, when temperature and pressure were increased, the DME spray penetration length was decreased since evaporation effect of DME was risen by high temperature. In addition, DME spray penetration velocity was drop by high pressure condition which was high density of a pre-mixed combustion gas. In contrast, while the temperature and pressure were decreased the penetration length was elongated and penetration velocity was faster relatively. When DME injection pressure was increased, there was no effect of penetration length but penetration velocity was increased while spray angle was enlarged.
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