Influence Analysis On The Influence Mechanism Of Microwave Heating Regeneration And Mechanism Of Multi-field Synergy In The Diesel Particulate Filter

The diesel engine is used widely due to its advantage such as high thermal efficiency,reliability and good durability,but the pollutants of diesel exhaust particulate emission has seriously harmed the environment and human health.It is well known that it is difficult to meet stringent emissions regulations only by improving the internal combustion.Nowadays,diesel particulate filter(DPF)is universally accepted by scholars as the most effective post-processing device in controlling the particulate discharge from diesel engines,the key technology to it is the regeneration.The thermal regeneration is one of the most promising methods for the regeneration of the filter.The present research on diesel particulate filter regeneration technology is focused on the heat regeneration technology and method of reducing ignition temperature of PM,but the influence of heat transfer performance on the safety of the regeneration of the filter body.Therefore,it is of great scientific significance and application value to study the regeneration performance of the filter.The thesis supported by national science fund project[51176045],which is"Research on optimization and mechanism of multi-field synergy in the composite regeneration of diesel particulate filter and Research on Pd/graphene catalyzed rotary particle trap filter for microwave heating and heat-electron-electrochemical coupling optimization ".Using the method combined by numerical simulation method,experimental verification and field synergy theory to research the temperature characteristic and mechanisms of field synergy in different mass flow on microwave regeneration.The main innovative points are as follows:(1)Based on the research of characteristics of microwave heating regeneration,established the mathematical model of DPF microwave regeneration,and the regeneration of the particulate filter is simulated by FLUENT software.The DPF thermal regeneration process is obtained under different exhaust flow heat transfer characteristics of the filter body.(2)The key geometric structure parameters(thermal conductivity X,and porosity P)and the regeneration gas condition parameters(the highest temperature heating Tmax,flow oxygen content)are analyzed its influence on heat transfer performance of DPF.And synthesis analysis the distribution of temperature gradient to reduce the internal temperature gradient and highly performance ratio.(3)To analyze the process of microwave regeneration of diesel particulate filter by multi-field synergy theory.The change law and the property of the temperature gradients and the seepage velocity vectors of DPF were studied.The research result was expected to attach quite important referential value to the thermal regenerative performance of DPF and synergy optimization in different mass flow.