| Diesel particulate emissions has caused the world and the public's attention,particulate emissions control technology has become the research focus on diesel engine industry, researching on particulate emission control will bring considerable economic benefit and social benefit. Therefore, reducing diesel particulate emissions has become a subject for the further development of diesel engine, which has a very good research prospect.This paper is supported by National Natural Science Fund Program [51176045]“Research on optimization and mechanism of multi-field synergy in the composite regeneration of diesel particulate filter”. Using the method combined by numerical simulation method, field synergy theory and catastrophe theory to research the process of composite regeneration of diesel particulate filter. The main research work is expressed as follows:(1) Used the catastrophe theory to establish a capture failure cusp of catastrophic model, by analyzing particulate filter capture failure cusp catastrophic model of critical point and the singularity set, and particulate filter capture failure discriminant of cusp catastrophe model, which predicted the capture terminal point of particulate filter effectively.(2) A mathematical model of 3-dimensional porous media and heat transfer wall flow particulate filter was established, synergistic analysis on the microwave regeneration process of diesel particulate filter under the conditions of different velocities,temperatures and pressures, which revealed the mechanism of field synergy of the microwave regeneration process.(3) According to the simulation data and structure parameters of particulate filter,microwave regeneration process of particulate filter was validated by using engine testing, the results showed that, the 3-dimensional mathematical model of wall flow particulate filter porous media heat transfer had a characteristics of low relative error and high precision. |
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