• Title/Summary/Keyword: 디젤 연소

Search Result 501, Processing Time 0.024 seconds

Comparison of Particulate Matters in a Compression Ignition Engine under Mid-load Condition Fuelled with Diesel and Biodiesel fuel (압축 착화 엔진의 중부하 운전 영역에서 디젤 및 폐식용유 바이오디젤 연소 시 발생하는 입자상 물질에 관한 특성 비교)

  • Hwang, Joonsik;Jung, Yongjin;Qi, Donghui;Bae, Choongsik
    • 한국연소학회:학술대회논문집
    • /
    • 2013.06a
    • /
    • pp.29-31
    • /
    • 2013
  • In this study, the characteristics of particulate matters (PM) from diesel and biodiesel fuel combustion was experimentally investigated. The experiment was performed in a single cylinder common-rail compression ignition engine. The fuels were injected at -5 CAD (Crank angle degree) ATDC (After top dead center) with 80 MPa injection pressure. Size distribution of PM was measured by scanning mobility particle sizer (SMPS) and morphology of PM was studied by transmission electron microscopy (TEM). PM from biodiesel shows lower emission level and smaller primary particles.

  • PDF

A Theoretical and Experimental Study on the Prediction of Volumetric Efficiency for 4-Cylinder Diesel Engine (4기통 디젤기관의 체적효율 예측에 관한 수치해석 및 실험적 연구)

  • 이재순;윤건식;심현수;박상기
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.16 no.10
    • /
    • pp.1928-1939
    • /
    • 1992
  • In this study, a computer program has been developed which predicts the variation of the volumetric efficiency with the change of design of the intake system effectively by the analysis of the flow in each part of a multi-cylinder compression ignition engine. For the calculation of the flow in the intake and exhaust systems, the method of characteristics has been used, and the double Wiebe's function has been adopted for the calculation of the heat release rate in the cylinders. The accuracy of presented method has been proved through the comparison between the simulation and experimental results over the various engine speeds and intake pipe lengths.

한국에서 일하는 외국인 과학기술자 - 인하대서 디젤가스 후처리 기술 공동연구 중국 '샤오 푸밍'박사

  • Korean Federation of Science and Technology Societies
    • The Science & Technology
    • /
    • v.33 no.11 s.378
    • /
    • pp.76-77
    • /
    • 2000
  • 99년 9월 한국에 온 중국 산둥기술대의 샤오 푸밍박사는 인하대 기계공학과 연소공학연구실에서 플라즈마를 이용한 디젤엔진 배기가스처리기술 개발을 위해 땀을 흘리고 있다. 인하대 팀과 공동연구로 진행하고 있는 플라즈마를 이용한 배기가스 후처리연구는 디젤엔진의 후처리 기술 중에서 가장 실용화 가능성이 높은 기술로 현재는 불모지나 다름없지만 앞으로 황금시장의 핵심기술로 평가되고 있다.

  • PDF

Effects of the Ultrasonic Energy on the IDI Diesel Engine Performance (초음파에너지가 간접분사식 디젤기관 성능에 미치는 영향)

  • Lee, Byoung-Oh;Kim, Yong-Guk;Lee, Seung-Jin
    • Journal of Energy Engineering
    • /
    • v.18 no.3
    • /
    • pp.169-174
    • /
    • 2009
  • In the study, the effect of the ultrasonic energy in transportational diesel fuel on the engine performance and exhaust emission has been investigated for indirect injection diesel engine. It was tested to estimated change of engine performance and exhaust emission characteristics for the transportational diesel fuels and the reforming fuels which was irradiated by the ultrasonic energy. The results of the study may be concluded as follows; By the irradiation of ultrasonic energy on the diesel fuel, cylinder pressure, heat release rate and engine power were increased but bsfc, mass fraction burned, and smoke were reduced. Also, the combustion was more stabilized and became complete and NOx was increased.

Diesel Engine Combustion Characteristics on the Natural Gas Mixing (천연가스 혼합에 의한 디젤기관의 연소특성)

  • Park, Myung-Ho
    • Journal of the Korean Institute of Gas
    • /
    • v.11 no.1 s.34
    • /
    • pp.9-12
    • /
    • 2007
  • In this study, a new method of combustion characteristics have been proposed to reduce exhaust emissions in a diesel engine using four kinds of mixed fuel. Mixed fuels show four different torque ratios between diesel oil md natural gas, which are 4:0, 3:1, 2:2 and 1:3. In order to investigate the exhaust gas during combustion, exhaust gases are sampled by gas analyzer, for example NOx, Soot, CO, and HC, as the RPM changed. As a result, the NOx, CO, and HC concentrations of mixed fuel are higher than those of diesel oil only. However, the Soot concentration of mixed fuel is lower when diesel oil is burned.

  • PDF

Spray and Flame Characteristics of Waste Cooking Oil Biodiesel and Diesel in a Compression Ignition Diesel Engine Using In-cylinder Visualization (가시화 엔진을 이용한 직접 분사식 압축착화 디젤엔진에서 폐식용유 바이오디젤과 디젤의 분무 및 화염 특성 비교)

  • Hwang, Joonsik;Bae, Choongsik
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.22 no.3
    • /
    • pp.105-113
    • /
    • 2014
  • Spray and combustion process with waste cooking oil (WCO) biodiesel and commercial diesel were analyzed in an optically-accessible single-cylinder compression ignition diesel engine equipped with a high pressure common-rail injection system. Direct imaging method was applied to investigate spray and combustion characteristics. From the mie-scattering results, it was verified that WCO biodiesel had a longer injection delay compared to diesel. Spray tip penetration length of WCO biodiesel was longer and spray angle was narrower than those of diesel due to poor atomization characteristics. In terms of combustion, WCO biodiesel showed later start of combustion, while flame was vanished more rapidly. Analysis of flame luminosity showed that WCO biodiesel combustion had lower intensity and lasted for shorter duration.

A study on characteristics of combustion and exhaust emissions on bio-diesel fuel in marine diesel generator engine (Low load centering) (선박용 디젤발전기에서 바이오연료의 연소 및 배기배출물 특성에 관한 연구 (저부하 영역 중심으로))

  • Cho, Sang-Gon
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.39 no.7
    • /
    • pp.716-721
    • /
    • 2015
  • As the severity of environmental pollution has increased, restrictions on air pollution have been strengthened. Stringent regulations have been imposed, not only on marine diesel engines but also on automotive and industrial power plants. Thus, biofuels have been directly applied in practical engines and used in training ships for basic research. Even though a high biofuel percentage cannot be used in a training ship engine for safety reasons, because this type of engine is larger than those used in institutional laboratories, the results will provide important basic information that will allow organizations to determine the status of a large output. Biodiesel fuel was studied to determine how it would affect the combustion characteristics and exhaust emissions of a marine diesel generator engine. The main results can be summarized as follows. Because the physical and chemical compositions of biofuels are similar to those of diesel fuel, it was found that their practical use was possible in a training ship. The specific fuel consumption and NOx increased, whereas a tendency was found for carbon monoxide and soot to decrease. In addition, no significant pressure change difference was found between the diesel fuel and biofuels.

Numerical Study on the Characteristics of Butane Fuels (부탄 연료의 연소 특성에 관한 수치해석적 연구)

  • Choi, Sul-Ki;Baik, Doo-Sung;Lee, Jong-Sun
    • Proceedings of the KAIS Fall Conference
    • /
    • 2009.12a
    • /
    • pp.897-899
    • /
    • 2009
  • 본 연구는 수치해석 코드를 사용하여 액화석유가스의 연소 특성을 파악하고자 한다. 시뮬레이션은 Chemkin 코드를 적용하여 정적연소와 같은 조건에서 모델링되었다. 특히 연소 현상을 파악하기 위해서 당량비를 변화시켰다. 이러한 연구는 LPG 연료를 사용하는 압축착화 디젤엔진의 기초적인 연구에 도움을 줄 것이다.

  • PDF

An Experimental Analysis on the Behavior Characteristics of Evaporative Impinging Spray (증발 충돌분무의 거동특성에 관한 실험연구)

  • Yeom, J.K.
    • Journal of Power System Engineering
    • /
    • v.14 no.2
    • /
    • pp.16-21
    • /
    • 2010
  • 분사된 연료의 미립화(atomization), 증발(evaporation), 그리고 혼합기형성과정(mixture formation process)이 디젤엔진의 착화 및 연소특성에 영향을 미치기 때문에, 디젤엔진 내에 분사된 연료의 구조해석으로부터 일련의 과정, 즉 고압분사, 분열(breakup), 미립화, 그리고 주위기체의 난류 도입(entrainment)에 관한 연구$^{1-3)}$는 꾸준히 행해져왔다. 본 연구는 증발디젤분무의 구조해석으로부터 디젤충돌분무의 혼합기형성과정을 조사한다. 주위기체의 밀도는 실험변수로서 선택하였고, $5.0kg/m^3$에서 $12.3kg/m^3$까지 변화시켰다. 그리고 소형고속디젤엔진에 있어서 연료분사초기의 상태의 고온 고압 설정이 가능한 정적용기를 사용했다. 주위 온도와 연료분사압력은 각각 700K 및 72MPa로 일정하게 유지했다. 충동증발분무의 액상과 기상의 이미지는 엑시플렉스형광법으로 동시 계측하였다. 실험결과로서 주위기체의 밀도가 높을수록 충돌분무의 선단도 달거리가 주위기체의 항력으로 인하여 감소하였다.

Characteristics of Particulate Emitting from a Diesel Engine 1st Report (디젤기관으로부터 배출되는 미립자상물질의 특성 1보)

  • 하종율
    • Journal of the korean Society of Automotive Engineers
    • /
    • v.12 no.2
    • /
    • pp.3-10
    • /
    • 1990
  • 본 글에서는 미립자의 생성과정과 이미 발표된 생성, 산화모델의 특성, 기관운전조건에 따른 생성 조건 및 저감기술에 대하여 종합하였다. 1. 미립자의 생성과정. 2. 미립자의 생성과 산화의 모델. 3. 미립자 발생의 시간 경과. 4. 연소방식과 미립자의 생성. 5. 연소실내 가스유동.

  • PDF