含Pt颗粒涂层的喷管射流型微燃烧器稳定燃烧机理及其性能协同优化研究

为提高含Pt颗粒涂层的喷管射流型微燃烧器热辐射率和降低能量消耗，采用数值仿真优化与实验相结合的方法，在研究含Pt颗粒涂层的喷管射流型微燃烧器内氢气起燃特性影响的基础上，辨析含Pt颗粒涂层的喷管射流型微燃烧器稳定燃烧机理，同时采用热-流-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-流-化-力学多场及外场协同数学模型，从唯象上研究各种物理场的协同性及其对提高含Pt颗粒涂层的喷管射流型微燃烧器的起燃特性、燃烧效率、催化转化率和热辐射率等性能指标的优化机制，从而提出一种能从各物理场协同优化来有效提高含Pt颗粒涂层的喷管射流型微燃烧器工作性能的理论方法。项目研究成果不仅对微燃烧器燃烧传热性能优化具有重要学术价值，而且对提高能源利用率具有重要现实意义。

In order to improve the thermal emissivity of the nozzle jet micro combustor with Pt particle coating and lower the energy consumption, the method combining numeric al simulations and experiments is employed. Firstly, effects of the hydrogen light-off characteristics in the nozzle jet micro combustor with Pt particle coating are investigated. Then, the stable combustion mechanism of the nozzle jet micro combustor with Pt particle coating is identified. Meanwhile, heat-flow-chemistry-mechanicals coupling theory and field synergy principle are adopted to build up the mathematical model about the synergy of heat-flow-chemistry-mechanicals multi-field and outfields based on the minimum entropy generation. In the viewpoint of phenomenology, the synergy among various physical fields and its positive effect on the light-off characteristic, combustion efficiency, catalytic conversion rate and thermal emissivity in the nozzle jet micro combustor with Pt particle coating are studied. Finally, based on the synergic effect of various fields, a theoretical method for effectively improving the work performance of the nozzle jet micro combustor with Pt particle coating is proposed. This project not only has important theoretical and application value for the performance optimization of the combustion and heat transfer about the micro combustor, but also has significant reference value for improving energy utilization.