Pd/石墨烯催化型旋转式微粒捕集器过滤体分区微波加热再生与热-电-化-力学耦合协同优化研究

In order to improve the regeneration efficiency of rotary particulate filter with Pd/Graphene catalytic and lower the consumption of microwave energy, the method combining numerical simulations and experiments is employed. Firstly, effects of Pd/Graphene catalyst on particle deposition laws in the filter body of the rotary particulate filter are investigated. Then, the regeneration mechanism of microwave heating in the filter body of rotary particulate filter with Pd/Graphene catalytic is identified. Meanwhile, heat-electrics-chemistry-mechanicals coupling theory and field synergy principle are adopted to build up the mathematical model about the synergy of heat-electrics-chemistry-mechanicals multi-field and outfields based on the minimum entropy generation. In the viewpoint of phenomenology, the synergy between various infields and outfields and its positive effect on the microwave heating performance about regeneration efficiency, regeneration frequency and maximum regeneration temperature in the rotary particulate filter with Pd/Graphene catalytic are studied. Finally, based on the synergic effect of various fields, a theoretical method for effectively improving the regeneration performance of microwave heating in the rotary particulate filter with Pd/Graphene catalytic is proposed. This project not only has important theoretical and application value for controlling diesel particulate emissions, but also has significant reference value for reducing mobile pollution sources and smog phenomenon.

为提高Pd/石墨烯催化型旋转式微粒捕集器过滤体分区再生效率和降低微波能量消耗，采用数值仿真优化与实验相结合的方法，在研究Pd/石墨烯催化剂对旋转式微粒捕集器过滤体内微粒沉积规律影响的基础上，辨析Pd/石墨烯催化型旋转式微粒捕集器过滤体分区微波加热再生机理，同时采用热-电-化-力学耦合理论和场协同优化理论构建基于系统最小熵增的热-电-化-力学多场及外场协同数学模型，从唯象上研究各种内场及外场的协同性及其对提高催化型旋转式微粒捕集器过滤体分区微波加热再生效率、再生频率和再生最高温度等再生性能的优化机制，从而提出一种能从各场协同优化来有效提高Pd/石墨烯催化型旋转式微粒捕集器过滤体分区微波加热再生性能的理论方法。项目研究成果不仅对柴油机微粒排放控制具有重要的理论与应用价值，而且对治理移动污染源和雾霾现象具有重要的参考价值。

对于解决柴油机微粒排放问题最有效的微粒捕集器而言，如何有效地实现微粒捕集器过滤体复合再生，有效解决再生效率低和有效再生工况窄等困难已成为微粒捕集器过滤体复合再生过程亟需解决的重要问题。而采用涂层Pd/石墨烯催化剂和微波加热相结合的方式辅助柴油机旋转式微粒捕集器过滤体进行分区连续复合再生方式为实现微粒捕集的持续有效再生提供了新思路。为此，采用数值仿真优化与实验相结合的方法，在研究催化型旋转式微粒捕集器过滤体内微粒沉积规律影响的基础上，辨析了催化型旋转式微粒捕集器过滤体分区微波加热再生机理，同时采用热-电-化-力学耦合理论和场协同优化理论构建基于最小熵增的热-电-化-力的场协同数学模型，从唯象上研究各种内场及外场的协同性及其对提高催化型旋转式微粒捕集器过滤体分区微波加热再生效率、再生频率和再生最高温度等再生性能的优化机制，从而提出一种能从各场协同优化来有效提高催化型旋转式微粒捕集器过滤体分区微波加热再生性能的理论方法。. 目前本项目组已在“Renewable & Sustainable Energy Reviews”、“Applied Energy”“ Energy Conversion and Management”、“Energy”、“Fuel”、“Applied Thermal Engineering”和“Advanced Materials Interfaces”上发表SCI论文15篇，出版学术专著1本，授权发明专利1项，在2019 年中国工程热物理学会多相流学术会议做特邀报告1次，培养了3名博士和5名硕士。此外，本项目组还与新西兰坎特伯雷大学的D. Zhao教授和新加坡国立大学W.M. Yang教授等就微孔介质燃料洁净燃烧过程与多场协同优化机理辨析问题开展合作研究4年，取得了较好的合作成果。. 项目研究成果不仅对柴油机排放控制具有重要的理论与应用价值，而且对治理移动污染源、保护环境具有重要的参考价值。