Subject: Quantitative Soot Measurement for Diesel Alternates

Speaker: KOOK Sang Hoon (Professor, University of New South Wales)

Date and Time: December 29 (Thur), 11 am.

Place: College of Engineering (Building 301), Room 1512-2

Speaker's C.V.
Appointments
2011-pres. Senior Lecturer of Mechanical Engineering, UNSW
2009-2011 Lecturer of Mechanical Engineering, UNSW
2007-2009 Post-doc, Sandia National Laboratories, Livermore, CA, USA
2006-2007 Associate Research Fellow, KISTEP, Seoul, Korea
Education
2006 Ph.D. Mechanical Engineering, KAIST, Daejeon, Korea
2002 M.S. Nuclear Engineering, KAIST, Daejeon, Korea
2000 B.S. Mechanical Engineering, KAIST, Daejeon, Korea

Summary
Future fuels will come from a variety of feed stocks and refinement processes. Understanding the fundamentals of combustion and pollutants formation of these fuels will help clear hurdles in developing flex-fuel combustors. To this end, we have investigated the soot formation and oxidation processes for various classes of fuels, each with distinct physical properties and molecular structures. The fuels considered include: conventional diesel, low-aromatics jet fuel, world-average jet fuel, Fischer-Tropsch synthetic fuel, coal-derived fuel, and a two-component surrogate fuel. Fuel sprays were injected into constant-volume combustion chamber using pre-burn technique to create high-temperature, high-pressure ambient conditions. Simultaneous laser extinction (LE) measurement and planar laser-induced incandescence (PLII) imaging were performed to derive the in-situ soot volume fraction. Further details of the soot processes were clarified by sampling the soot particles from within the reacting jet by means of a thermophoretic probe, with subsequent analysis by transmission electron microscopy (TEM). Correspondence of these TEM images to the soot volume fraction trend will be discussed. In addition, a brief introduction of current engine research at the University of New South Wales will be given as well as a general aspect of Australian automobile industry.

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