Abstract Combustion environments in propulsion systems involve the interaction of a variety of physics. In devices such as augmentors, ramjets and scramjets, such environments include the interaction between combustion, high-intensity turbulence, and/or strong flow compressions and expansions, physics which are termed here high-speed combustion. With this motivation in mind, this paper addresses: What are the problems encountered when modeling these interactions, or in other words, what are the problems of turbulent-combustion modeling? Do such interactions need modeling? What are the challenges when going from modeling low-speed- to high-speed-combustion problems? This work addresses these questions by summarizing several modeling studies of gaseous high-speed-combustion problems, and attempts to interpret some predictions in the context of the models’ basic assumptions. Interestingly, the challenges to model high-speed combustion are such that a reader not interested in this topic but in the general one of modeling turbulent combustion may find the present paper useful.

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推进系统中高速湍流燃烧建模的进展和挑战

摘要 推进系统中的燃烧环境涉及多种物理场的相互作用。在诸如增强器、冲压发动机和超燃冲压发动机之类的设备中，这种环境包括燃烧、高强度湍流和/或强流动压缩和膨胀之间的相互作用，这里称为高速燃烧的物理学。考虑到这一动机，本文将讨论：对这些相互作用进行建模时遇到了哪些问题，或者换句话说，湍流燃烧建模存在哪些问题？这种交互需要建模吗？从低速燃烧问题到高速燃烧问题的建模有哪些挑战？这项工作通过总结气体高速燃烧问题的多项建模研究来解决这些问题，并试图在模型的基本假设的背景下解释一些预测。有趣的是，对高速燃烧建模的挑战在于，对这个主题不感兴趣但对湍流燃烧建模的读者可能会发现本文很有用。