Effect of Engine Operating Conditions on Nanostructure and Oxidation Reactivity of Soot Particles from Diesel Engine

Microscopic visualization experiments and simple numerical calculations using Darcy's law have been conducted for soot (PM) deposition in hexagonal channel diesel particulate filters (HEX DPFs) made of aluminum titanium oxide. In the HEX DPFs, a flow rate of the conventional wall-through flow crossing over a wall between inlet and outlet channels (an Inlet/Outlet wall) changes drastically during surface pore filtration, because a part of working gas with soot is distributed to an Inlet/Inlet wall as a bypass flow which is introduced into a wall between inlet and inlet channels (an Inlet/Inlet wall), then turning toward the direction parallel to its wall surface, and finally exiting into the outlet channel. In this case, the thickness of soot deposited on the surface of the Inlet/Inlet wall becomes thinner for the dependence on the distance from the outlet channel. On the other hand, during soot cake layer filtration, since the difference between both superficial flow velocities for Inlet/Inlet and Inlet/Outlet walls become smaller, growth rates of soot cake layers are almost uniform on both wall surfaces. Consequently, the thickness of soot deposited on the Inlet/Inlet wall has a distribution from the minimum height at the center of the channel width to the maximum around the edge.

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The Effect of Fuel Property on Nanostructure of Soot Particles from Diesel Engine

Hayashida¹,

Itabashi²,

Ishitani³

2018

Journal of The Japan Institute of Marine Engineering

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Effect of Engine Operating Conditions on Nanostructure and Oxidation Reactivity of Soot Particles from Diesel Engine

Cited by 3 publications

References 25 publications

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Mid carbon (C6+-C29+) in refractory black carbon aerosols is a potential tracer of open burning of rice straw: Insights from atmospheric observation and emission source studies

Effects of bypass flows through Inlet/Inlet walls on PM deposition in hexagonal channel diesel particulate filters

The Effect of Fuel Property on Nanostructure of Soot Particles from Diesel Engine

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