Progress in knowledge of flamelet structure and extinction
Progress in knowledge of flamelet structure and extinction
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DOI：
10.1016/s0360-1285(00)00012-5
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发表时间：
2000-08
影响因子：
29.5
通讯作者：
F. Williams
中科院分区：
文献类型：
--
作者：
F. Williams
在过去的25年里，在研究火焰、其结构及其对各种扰动的反应方面取得了相当大的进展。这里所用的术语“小火焰”对大多数读者来说实际上是指“层流火焰”，之所以使用它，只是因为它的主要动机是最终用于更复杂的流动，主要是湍流。然而，这里没有考虑如何在湍流燃烧的小火焰模型中使用所回顾的知识。甚至没有时间依赖的火焰处理，虽然提供了一些相关的参考。重点是狭窄的，即准稳态flamerican，因此考虑的小火焰灭绝的关注准稳态灭绝，也就是说，没有灭绝的动力学。即使在这个狭窄的范围内，也可以看到已经取得了很大的成就。从长远的角度来看，取得的进展是惊人的。预混，非预混和部分预混系统的进展分别解决。最后提出了今后研究的方向。尽管这一专题的范围有限，而且取得了广泛的进展，但仍有更多的研究工作要做。
In the past 25 years there has been a considerable amount of progress in studying flamelets, their structures and their responses to various perturbations. The term “flamelet” as used here really would mean “laminar flame” to most readers and is employed only because a major motivation is for ultimate use in connection with more complex flows, mainly turbulent. There is, however, no consideration here of how the knowledge reviewed may be employed in flamelet modeling of turbulent combustion. Not even time-dependent flamelets are addressed, although a few related references are provided. The focus is narrower, namely on quasisteady flamelets, and therefore the considerations of flamelet extinction that are presented concern quasisteady extinction, that is, not the dynamics of extinction. Even in this narrow context, it will be seen that a great deal has been accomplished. When such a long-term view is taken, it is found remarkable how much progress has been made. The progress is addressed separately for premixed, nonpremixed and partially premixed systems. Suggested directions of future research also are indicated. Despite the limited scope of the topic and the extensive advancement that has occurred, much more research remains to be done.