Fundamental Physical Understanding of Matrix-stabilized Combustion in Porous Media

这项研究的目的是发展计算和实验方法，以提高对多孔介质中基质稳定燃烧的基本理解。基质稳定燃烧是一种先进的燃烧概念，燃烧是在多孔的导热基质中持续进行的。多孔基质内的内部热再循环有助于预热未燃烧的气体混合物，从而实现高效率和低污染操作。然而，对燃烧和换热过程的有限认识是成功实施交通和发电低排放燃烧技术的主要挑战。通过将计算建模和实验研究相结合，本研究试图实现对多孔介质中基质稳定燃烧的定量预测和详细分析。具体地说，计算研究的目标是开发一种高保真模拟能力，以实现对多孔结构内非均相燃烧过程和气固相互作用的详细孔分辨模拟。实验工作将集中在开发先进的非侵入性X射线诊断技术，以获得对多孔基质内部的温度场和燃烧过程的定量测量。通过结合详细的模拟和实验诊断，将进行系统的调查，以获得对非均质燃烧过程的基本了解，识别火焰结构，并评估操作条件、材料特性和气孔拓扑对火焰稳定、排放和燃烧性能的影响。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The objective of the proposed research is to develop computational and experimental methods to improve the fundamental understanding of matrix-stabilized combustion in porous media. Matrix-stabilized combustion is an advanced combustion concept in which combustion is sustained within a porous heat-conducting matrix. The internal heat recirculation within the porous matrix facilitates preheating of the unburned gas mixture, thereby enabling high-efficiency and low-pollution operations. However, the limited understanding about the combustion and heat transfer processes represents a major challenge toward the successful implementation as low-emission combustion technology for transportation and power generation.By combining computational modeling with experimental investigations, this research seeks to enable the quantitative prediction and detailed analysis of matrix-stabilized combustion in porous media. Specifically, the goal of the computational research is to develop a high-fidelity simulation capability to enable detailed pore-resolved simulations of heterogeneous combustion processes and gas-solid interaction inside the porous structure. The experimental effort will focus on the development of advanced non-intrusive X-ray diagnostics to obtain quantitative measurements of the temperature field and combustion processes inside the porous matrix. By combining detailed simulations and experimental diagnostics, systematic investigations will be performed to obtain fundamental understanding of heterogeneous combustion processes, identify flame structure, and assess effects of operating conditions, material properties and pore topology on the flame stabilization, emissions, and combustion performance.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.