燃烧驱动的振荡是锅炉、热水器和熔炉的常见问题。声音由火焰产生，并从燃烧室下游反射。反射声波会干扰混合物流动或当量比，从而增加热释放脉动和火焰产生的伴随声。Baade在之前的工作中使用正反馈回路描述了这种现象。目前的报告将反馈回路稳定性模型应用于两台出现燃烧振荡的锅炉。此外，对Baade的反馈回路稳定性方法进行了修改，以预测由于当量比波动引起的振荡。

Combustion driven oscillations are a common problem with boilers, water heaters, and furnaces. Sound is produced by the flame and is reflected downstream from the combustion chamber. The reflected sound waves disturb the mixture flow or equivalence ratio increasing the heat release pulsations and the accompanying sound produced by the flame. This phenomenon has been described using a positive feedback loop in prior work by Baade. The current report applies the feedback loop stability model to two boilers, which exhibited combustion oscillations. In addition, Baade's feedback loop stability approach was modified to predict oscillations due to equivalence ratio fluctuations.