| Seminar Announcement |
Challenges in Modeling Soot Formation in Turbulent
Hydrocarbon Flames
Guillaume Blanquart
Department of Mechanical Engineering
California Institute of Technology
Pasadena, CA
Understanding and modeling soot particle dynamics in combustion
systems is a key issue in the development of low emission engines. In
engines, soot particles are formed as a result of complex hydrocarbon
chemistry and are subject to a turbulent flow field which controls
ultimately the yield of soot particles. In this work, we will detail
the strategies used to model the various chemical and physical
processes encountered both in laminar and turbulent flames. More
precisely, we will consider the impact of the chemistry on the
inception of the first soot particles, the geometrical and statistical
representation of fractal aggregates, the oxidation and fragmentation
of particles under lean conditions, and finally the turbulent
transport of soot in complex unsteady flows. For each of these cases,
we will compare our results with experimental measurements and discuss
the differences. Finally, we will show preliminary results for the
first Large Eddy Simulation of a sooting turbulent jet diffusion flame
with detailed chemical and soot models. This last simulation
highlights the challenges in modeling soot evolution in turbulent
flames due to the nonlinear interactions between the particles and the
gas-phase turbulent combustion processes.
Wednesday, November 4, 2009
3:30 PM
Stauffer Science Lecture Hall, Room 100 (SLH 100)
Refreshments will be served at 3:15 pm.
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