Effects analysis on diesel soot continuous regeneration performance of a rotary microwave-assisted regeneration diesel particulate filter

In order to investigate effects of various factors on continuous regeneration performance of a rotary microwave-assisted regeneration diesel particulate filter (MRDPF), a regeneration mathematical model and a field synergy model of the rotary MRDPF are developed, and turbulent kinetic energy distribution and pressure distribution of the rotary MRDPF based on three different turbulence models are analyzed. The results indicate that the RNG k-epsilon model is more suitable for simulation of the rotary MRDPF and appropriate increment of filter unit number, oxygen content and exhaust gas temperature can result in the regeneration performance improvement of the rotary MRDPF. Inlet flow velocity of exhaust gas can change synergy degree between the velocity field and the temperature field and high synergy area is mainly concentrated in the upper and central parts of the filter unit. Moreover, field synergy degree and regeneration efficiency of the filter unit are both better when the flow velocity reaches 0.3 m/s during regeneration phase, where regeneration optimized area ratio and maximum regeneration efficiency are 0.51 and 91%, respectively. This work provides great reference values for optimizing the continuous regeneration performance of the rotary MRDPF.