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Effects of Pressure,Shear and Diluent on the Stabilization of Hydrogen-Oxygen Lifted Flames

机译：压力，剪切和稀释剂对氢气升降火焰稳定的影响

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Hydrogen is a leading candidate as an alternative fuel since its combustion does not produce any CO2 emissions.It is even possible to avoid NOx emissions if pure oxygen is diluted with steam.However,since steam may interfere with chemical reactions resulting in a change in thermochemical characteristics,the effect of steam dilution needs to be investigated.In this study,two-dimensional direct simulations at different pressures are used to investigate the effect of pressure on the stabilization mechanism of the steam diluted non-premixed lifted flames.Results are then elaborated using zero-dimensional homogeneous reactor and found out that steam dilution shifts the behavior of the ignition delay time with respect to pressure.Further chemical kinetic analyses,compared with N2 dilution showed that the high third body efficiency of H2O is responsible for this shift.Lastly,mean shear is added to 2D DNS cases and the initial shear free configuration is confirmed.
机译：氢是作为替代燃料的主要候选者，因为它的燃烧不会产生任何CO 2发射。如果用蒸汽稀释纯氧，则避免NOx排放。然而，由于蒸汽可能干扰化学反应，导致热化学的变化特性，需要研究蒸汽稀释的效果。在本研究中，使用不同压力的二维直接模拟来研究压力对蒸汽稀释的非预混升降火焰的稳定机制的影响。然后阐述了结果使用零维均匀反应器并发现蒸汽稀释时间相对于压力转移点火延迟时间的行为。与N2稀释相比，与N2稀释相比，H2O的高第三体效率与这种换档负责.Lastly ，平均剪切被添加到2D DNS案例中，并且确认了初始剪切装置。

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