INVESTIGATION OF CLOSURE MODELS FOR NONPREMIXED TURBULENT REACTING FLOWS
INVESTIGATION OF CLOSURE MODELS FOR NONPREMIXED TURBULENT REACTING FLOWS
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DOI：
10.1063/1.868443
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发表时间：
1994-03
影响因子：
4.6
通讯作者：
W. Mell;Vebjorn Nilsen;G. Kosály;J. Riley
中科院分区：
文献类型：
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作者：
W. Mell;Vebjorn Nilsen;G. Kosály;J. Riley
定常层流火焰面模型和条件矩闭合是将化学问题与湍流问题解耦的两种重要方法。这两个模型进行了研究，使用直接数值模拟。结果表明，基于Z空间反应区厚度的定常层流小火焰模型不能完全理解其正确性。一个新的条件有关的准稳态的化学反应的推导和应用的数据的解释。条件矩封闭导致优秀的数据预测提供的平均标量耗散率条件的混合分数是正确的建模。
The stationary laminar flamelet model and the conditional moment closure are two salient approaches to the decoupling of the chemistry problem from the turbulence problem. These two models are investigated using direct numerical simulations. The results and their analyses show that a full understanding of the validity of the stationary laminar flamelet model cannot be reached based upon the reaction zone thickness in Z space. A new condition regarding the quasisteadiness of the chemical reaction is derived and applied to the interpretation of the data. The conditional moment closure leads to excellent data predictions provided the average scalar dissipation rate conditioned on the mixture fraction is properly modeled.