本文描述了HAT循环中CO排放的基础研究结果.为了澄清加湿和CO排放的关系,采用GRI-mech3.0详细化学反应机理,对甲烷-湿空气对冲扩散火焰进行了数值研究.对不同的空气含湿量通过改变进口预热温度调节最高火焰温度,解耦湿空气影响火焰的温度和自由基浓度效应,研究甲烷-湿空气火焰中CO生成的化学机理.计算结果表明在火焰最高温度相同的情况下,湿空气中的水蒸汽使OH基浓度增加、O基和H基浓度降低,从而抑制CO的生成.这些结果有益于准确预测HAT循环中CO的排放.
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