一种改进的代数二阶矩燃烧模型被应用在Flame-D的大涡模拟中.代数二阶矩模型能够将化学反应速率的脉动项进行模拟,更准确地计算化学反应速率.在实际燃烧过程中,化学反应速率不仅与当地的温度以及组分浓度等相关,更与反应物的混合速率有密切的关系.研究考虑了亚网格尺度内混合速率对化学反应速率的影响,提出了改进的代数二阶矩模型.通过与相同模拟条件下的涡耗散概念模型的模拟结果以及实验结果进行对比,改进的代数二阶矩模型的准确性得到了验证,同时亚网格化学反应速率的模拟对总化学反应速率的影响也得到了研究.
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