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首页> 外文期刊>Combustion Science and Technology >THE EFFECT OF A LAMINAR MOVING FLAME FRONT ON THERMOACOUSTIC OSCILLATIONS OF AN ANCHORED DUCTED V-FLAME
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THE EFFECT OF A LAMINAR MOVING FLAME FRONT ON THERMOACOUSTIC OSCILLATIONS OF AN ANCHORED DUCTED V-FLAME

机译：层流移动火焰前缘对锚固管道式V型火焰热声振荡的影响

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When investigating combustion instabilities using analytical models, it has previously been assumed that the compact flame assumption implied that the flame-front movement did not need to be taken into account to solve the acoustics. This article shows that this is not necessarily the case. This article presents a generalization of such models of anchored V-flames to allow the flame "source" of acoustic waves to vary its position in time so as to track the flame-front location. A method for solving this problem is then presented. It is found that accounting for the flame front movement can alter both the linear stability of the combustor, and (for cases that remain unstable) the limit cycle amplitude. Significant changes in limit cycle amplitude are observed across a large range of operating conditions. The flame front movement has so far only been seen to provide a stabilizing effect, reducing the Rayleigh source term. Self-tuning regulator adaptive control methods appear to be unaffected by accounting for the moving flame front.
机译：在使用分析模型研究燃烧不稳定性时，以前已经假设紧凑的火焰假设意味着不需要考虑火焰前移来解决声学问题。本文显示不一定是这种情况。本文介绍了这种锚定V型火焰模型的一般化，以允许声波的火焰“源”及时更改其位置，以便跟踪火焰前部位置。然后提出一种解决该问题的方法。已经发现，考虑到火焰前移可以改变燃烧器的线性稳定性和（对于仍然不稳定的情况）极限循环幅度。在很大范围的工作条件下，观察到极限循环幅度的显着变化。迄今为止，仅观察到火焰前移提供稳定作用，从而减少了瑞利源项。自调节调节器的自适应控制方法似乎不受移动的火焰锋影响。

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