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Computational fluid dynamic analysis of counterflow turbulent premixed flames by the coherent flamelet model

机译:相干小火焰模型对逆流湍流预混火焰的计算流体动力学分析

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The Coherent Flamelet Model (CFM) is applied to Symmetric counterflow turbulent premixed flames studied by Kostiuk et al. The flame source term is set proportional to the sum of the mean and turbulent rate of strain while flame quenching is modeled by an additional multiplication factor to the flame source term. The turbulent rate of strain is set proportional to the turbulent intensity to match the correlation for the turbulent burning velocity investigated by Abdel-Gayed et al. The predicted flame position and turbulent flow field coincide well with the experimental observations. The relationship between the Reynolds averaged reaction progress variable and flame density seems to show a wrong trend due to inappropriate modeling of the sink and source term in the transport equation.
机译:相干小火焰模型(CFM)适用于Kostiuk等人研究的对称逆流湍流预混火焰。火焰源项的设置与平均应变率和湍流速率之和成正比,而火焰淬火则通过火焰源项的附加乘数建模。湍流应变率的设置与湍流强度成正比,以匹配Abdel-Gayed等人研究的湍流燃烧速度的相关性。预测的火焰位置和湍流场与实验观察结果非常吻合。雷诺平均反应进程变量与火焰密度之间的关系似乎显示出错误的趋势,这是由于在传输方程中对汇和源项的建模不当所致。

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