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首页> 外文会议>Spring Technical Meeting of the Eastern States Section of the Combustion Institute >Effects of Water and CO_2 Dilution on the Burning Characteristics of Methane/Air Premixed Flames in a Reactor-Assisted Turbulent Slot Burner
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Effects of Water and CO_2 Dilution on the Burning Characteristics of Methane/Air Premixed Flames in a Reactor-Assisted Turbulent Slot Burner

机译：水和CO_2稀释对反应器辅助湍流槽燃烧器中甲烷/空气预混火焰燃烧特性的影响

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摘要

In order to better understand the effects of exhaust gas recirculation, the impact of water and CO_2 dilution on the turbulent combustion of methane/air mixtures is experimentally investigated in a reactor-assisted turbulent slot (RATS) burner using OH planar laser-induced fluorescence measurements. It is shown that the primary contribution of both of these diluents is a reduction in the flame temperature, which leads to decreases in the turbulent burning velocity, flame surface density, and mean fuel consumption rate. However, when thermal effects are removed by holding the adiabatic flame temperature constant, it is shown that some chemical and transport contributions of these diluents are still present. The size of the turbulent flame brush increases even for fixed-temperature water and, to a lesser extent, CO_2 dilution. The turbulent burning velocity is also reduced for the CO_2 case, although it is essentially unchanged for the water case. The results of this investigation can be used as a platform for the isolation of turbulence-chemistry-transport interactions in premixed flames.
机译：为了更好地理解废气再循环的影响，使用OH Planar激光诱导的荧光测量的反应堆辅助湍流槽（大鼠）燃烧器在实验研究水和CO_2稀释对甲烷/空气混合物的湍流燃烧的影响。结果表明，这两种稀释剂的主要贡献是火焰温度的降低，导致湍流燃烧速度，火焰表面密度和平均燃料消耗率下降。然而，当通过保持绝热火焰温度常数除去热效应时，显示出这些稀释剂的一些化学和运输贡献仍存在。湍流火焰刷的尺寸甚至增加了固定水的水，并且在较小程度上增加了CO_2稀释。对于CO_2案例，湍流燃烧速度也降低，尽管水箱基本不变。该研究的结果可以用作分离预混合火焰中的湍流 - 化学传输相互作用的平台。

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