本项目拟结合理论分析、数值模拟与实验探索，围绕微多孔介质燃烧室受限孔隙空间内气体-颗粒两相微尺度流动传热过程中的关键科学问题开展深入系统研究，内容包括：1）从微气体中颗粒力学作用出发探究颗粒多尺度运动行为特征，定量揭示稀薄效应下气体-颗粒间动量非平衡传递机制；2）研究微尺度气体-颗粒-壁面间相互作用量化规律，构建气粒两相流跨尺度模拟数理模型，掌握受限孔隙空间中气粒两相流动行为特性；3）全面准确揭示微孔隙流道内气粒两相对流传热以及微纳颗粒辐射能量的多尺度传递行为规律，构建微尺度气粒两相对流-辐射耦合传热理论模型；4）探究基于三维真实几何结构数值重建的多孔骨架导热-辐射热量耦合传递规律，揭示多孔介质内气粒两相微尺度对流-辐射-导热复合热量传递机制。通过上述研究，旨在构建系统完整的微尺度气粒流动传热理论，完善和发展微尺度气固多相流科学体系，指导高效微多孔介质燃烧室的设计开发，具有重要科学意义。

With combined utilization of theoretical analysis, numerical modeling and experimental exploration, a thorough and systematic investigation will be carried out in this project on the crucial scientific issues of the micro-scale gas-particle fluid flow and combined heat transfer in confined pore space in micro porous media combustor. The main work includes: 1) exploring the mechanical action of solid particle in micro gas phase, revealing the multi-scale particle dynamic behavior and the non-equilibrium momentum exchange between gas and particle with the influence of rarefaction effect; 2) exploring micro-scale quantitative mechanism of interaction among gas, particle and wall, establishing the trans-scale numerical model for gas-particle two-phase flow, and revealing the flow characteristic in the confined pore space; 3) revealing the characteristic of gas-particle two-phase convection heat transfer in micro pore space and the multi-scale radiation heat transfer of micro/nano particles, developing the theoretical model for the coupled convection-radiation heat transfer of gas-particle two-phase fluid; 4) exploring the law of coupled conduction-radiation heat transfer of porous skeleton with the reconstruction of porous geometry, revealing the combined heat transfer mechanism of coupled convection-radiation-conduction heat transfer of gas-particle two-phase fluid in micro porous media. Based on the above investigation, the theoretical system for gas-particle two-phase flow and heat transfer in micro scale will be established. It can enrich the scientific system of micro-scale gas-solid multiphase flow, guide the design and development of new-type and efficient micro porous media combustor, and thus is of significant scientific value.