Study of the characteristic of diesel spray combustion and soot formation using laser-induced incandescence (LII) |
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| Affiliation: | 1. Clean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal, Makkah Province, Saudi Arabia;2. Transport Technologies Division, R&DC, Saudi Aramco, Dhahran, Eastern Province, Saudi Arabia;3. Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, United States;1. Department of Chemical Engineering, University of Utah, Salt Lake City, UT 84112-9203, United States;2. Department of Energy and Mineral Engineering, Penn State University, University Park, PA 16802, USA;1. CMT – Motores Térmicos, Camino de Vera (s/n), Universitat Politècnica de València, Edificio 6D, 46022 Valencia, Spain;2. Jaguar Land Rover Ltd, Abbey Road, Whitley, CV3 4LF Coventry, UK;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), ?Ministry of Education, Chongqing 400030, China;2. Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China;1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China;2. Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China;3. CMT-Motores Térmicos, Universidad Politécnica de Valencia, Camino de Vera s/n, E-46022 Valencia, Spain;4. Jiangsu Jia Yu Xin Industry Company, Jiangsu, Jurong 212400, China |
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| Abstract: | In this paper, the planar images of diesel spray combustion flame and soot formation were measured and analyzed by using LII, in a constant volume combustion vessel. The effects of combustion flame and fuel–air mixing characteristics on soot formation and distribution of soot concentration were studied at different conditions. The result indicates that, with increase in ambient temperature and pressure, the ignition delay of diesel fuel is shorter. The increase of ambient temperature and pressure and the reduction of injection pressure shorten the diesel flame lift-off length. The lower the ambient temperature and pressure, the weaker LII signal intensity. At the same ambient temperature and pressure condition, the higher the diesel injection pressure, the smaller the soot production in diesel jet spray, and soot particles are primarily produced in the relative fuel-rich region, which is encompassed by the flame surface front at the downstream of the diesel jet. |
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| Keywords: | Diesel spray combustion LII Constant volume combustion vessel Flame lift-off length Soot concentration |
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