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首页> 外文期刊>Combustion Science and Technology >STRETCH AND CURVATURE EFFECTS ON NO EMISSION OF THE LEAN H_2/AIR PREMIXED FLAMES
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STRETCH AND CURVATURE EFFECTS ON NO EMISSION OF THE LEAN H_2/AIR PREMIXED FLAMES

机译：稀薄的H_2 /空气预混火焰的拉伸和弯曲效应

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摘要

NO production is simulated and analyzed in three lean H_2 /air premixed flames: the classic one-dimensional (1D) flame, the opposed jet flame, and the tubular flame. The 1D flame is simulated with the PREMIX code followed by the SENKIN code to determine the NO production for a long residence time. The opposed jet flame and the tubular flame are simulated with the OPPDIF and TVBEDIF codes, respectively. The major factors influencing NO production are flame temperature, radical concentration, and post-flame residence time. For the 1D flame, almost 100% of NO is produced in the post-flame region and the reactant residence time in this region is the only factor determining NO concentration. For the opposed jet flame, flame stretch influences all three factors and the competition among them controls the NO concentration response to stretch rate. For the tubular flame, flame curvature influences flame temperature and post-flame residence time, and it makes the NO concentration response different from that of the opposed jet flame.
机译：在三种稀薄的H_2 /空气预混火焰中模拟和分析NO的产生：经典的一维（1D）火焰，相对的喷射火焰和管状火焰。使用PREMIX代码和SENKIN代码对一维火焰进行模拟，以确定长时间停留时的NO产生。相对的喷射火焰和管状火焰分别用OPPDIF和TVBEDIF代码进行模拟。影响NO产生的主要因素是火焰温度，自由基浓度和火焰后停留时间。对于一维火焰，在火焰后区域几乎产生100％的NO，反应物在该区域的停留时间是决定NO浓度的唯一因素。对于相对的喷射火焰，火焰拉伸会影响所有三个因素，它们之间的竞争控制了NO浓度对拉伸速率的响应。对于管状火焰，火焰曲率会影响火焰温度和火焰后停留时间，并使NO浓度响应与对置喷射火焰不同。

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