서지주요정보
커먼레일 분사장치를 이용한 디젤과 Dimethyl ether(DME) 의 분무 및 연소특성 비교 = Dimethyl ether(DME) spray and combustion charateristics compared to diesel in a common-rail fuel injection system
서명 / 저자 커먼레일 분사장치를 이용한 디젤과 Dimethyl ether(DME) 의 분무 및 연소특성 비교 = Dimethyl ether(DME) spray and combustion charateristics compared to diesel in a common-rail fuel injection system / 이주광.
저자명 이주광 ; Lee, Ju-Kwang
발행사항 [대전 : 한국과학기술원, 2004].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014954

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 04055

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Dimethyl Ether (DME) has been considered as one of the most attractive alternative fuels for compression ignition engines. Its main advantage in diesel engine application is high efficiency with soot free combustion, though conventional fuel injection system has to be modified due to the intrinsic properties of DME. In this study, first, the behavior of a DME spray was investigated a constant volume vessel (CVV) pressurized with nitrogen gas with a common-rail type fuel injection system. Second, the Bosch type injection meter rate recorded the injection rates of DME and diesel fuel, respectively. The injection delay of DME was shorter than that of diesel fuel. The measured injection rates of DME and diesel fuel were correlated with spray penetrations. The penetration-prediction method was established by using injection rate, which was verified with the Dent's penetration model. Third, combustion processes and emissions of a direct injection CI engine fueled with DME and diesel fuel were compared at idle engine speed. An optical single cylinder diesel engine equipped with a common-rail fuel injection system was constructed to investigate combustion process of DME and diesel fuel. The image was recorded by a high-speed video camera system. Tests were performed at fixed engine speed with various injection and flow parameters. The results demonstrated that the DME-fuelled engine was superior to the conventional diesel engine in terms of thermal efficiency and emissions. The optimal injection timing of DME was around TDC, which was roughly same as that of diesel fuel. For a very early injection, NOx levels increased considerably because the combustion temperature increased when injection occurred much earlier than TDC. NOx emission of DME was same or a little higher than that of diesel fuel at the same injection pressure and injection timing because of higher evaporation characteristics of DME. All experimental conditions, DME did not produce any measurable smoke levels.

서지기타정보

서지기타정보
청구기호 {MME 04055
형태사항 viii, 44 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ju-Kwang Lee
지도교수의 한글표기 : 배충식
지도교수의 영문표기 : Choong-Sik Bae
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 43-44
주제 커먼레일 분사장치
Common-rail fuel injection system
Dimethyl ether(DME)
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