Effects analysis on soot combustion performance enhancement in a rotary diesel particulate filter unit during continuous microwave heating

In this paper, a mathematical model of a rotary diesel particulate filter (RDPF) unit is established using fluid mechanics and porous media theory, and simulated with Fluent software to obtain its flow field characteristics, including velocity distributions, pressure distribution, turbulent kinetic energy distribution, and the internal situations of RDPF unit are intuitively presented. Aiming at the further improvement of the soot combustion performance, changing many parameters such as exhaust temperature, exhaust oxygen concentration, soot concentration, microwave heating power, etc., its regeneration time and regeneration efficiency are studied under different conditions. The results show that the exhaust temperature with 600 similar to 750 K, the exhaust oxygen concentration with 0.11 similar to 0.15, the soot concentration with 0.06 similar to 0.08 and microwave heating power with 800 similar to 1200 W will be contributed to the improvement of the soot combustion performance in the RDPF unit. The research results are useful for enhancing the regeneration performance in RDPF unit.