用于预混爆燃和爆轰的热力学一致流形模型
A Thermodynamically Consistent Manifold Model for Premixed Deflagrations & Detonations
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中文总结 AI 辅助
针对可压缩预混火焰建模难题，提出基于流形的湍流燃烧模型，经迭代确保模型与求解器热力学状态一致，再现关键量，解决现有方法局限。验证表明该模型在多区域优于现有方法，为高速反应流LES提供工具并奠定研究基础。
中文摘要 AI 辅助
由于热化学状态与局部热力学状态之间的强耦合性，对包含爆燃和爆轰的可压缩预混火焰进行精确建模仍然是预测性大涡模拟（LES）面临的重大挑战。本文提出了一种基于流形的湍流燃烧模型，通过迭代过程确保模型与流动求解器之间的热力学状态完全一致。该框架再现了包括温度、自由基物种和源项分布在内的关键量，解决了现有方法依赖低马赫扰动或无热力学一致性的表格化ZND爆轰的局限性。通过与一维和高保真RDE类数据进行验证，表明该热力学一致模型在广泛的可压缩火焰区域（包括爆燃和爆轰）中始终优于现有方法。结果突出了充分考虑热力学状态以实现准确预测的重要性。该模型在单个框架内捕捉了爆燃和爆轰行为，为高速反应流的LES提供了统一、通用的工具，并为未来可压缩反应流的研究奠定了基础，包括应用于旋转爆震发动机和其他超音速燃烧系统。
英文摘要
Accurate modeling of compressible premixed flames, encompassing both deflagrations and detonations, remains a significant challenge for predictive Large Eddy Simulation (LES) due to the strong coupling between the thermochemical state and the local thermodynamic state. This work presents a manifold-based turbulent combustion model that ensures a fully consistent thermodynamic state between model and flow solver through an iterative procedure. The framework reproduces critical quantities including temperature, radical species, and source term profiles, addressing limitations of existing approaches that rely on low-Mach perturbations or tabulated ZND detonations without thermodynamic consistency. Validation is performed against one-dimensional and high-fidelity RDE-like data, demonstrating that the thermodynamically consistent model consistently outperforms existing approaches across a broad range of compressible flame regimes - including both deflagration and detonation. The results highlight the importance of fully accounting for the thermodynamic state to achieve accurate predictions. By capturing both deflagrative and detonative behavior within a single framework, the model provides a unified, versatile tool for LES of high-speed reacting flows and offers a foundation for future studies of compressible reacting flows, including applications to rotating detonation engines and other supersonic combustion systems.
