Large Eddy Simulation to Predict Flame Front Position for Turbulent Lean Premixed Jet Flame at High Pressure
Large Eddy Simulation to Predict Flame Front Position for Turbulent Lean Premixed Jet Flame at High Pressure
复制标题
大涡模拟预测高压湍流稀薄预混射流火焰的火焰锋位置
DOI：
10.1115/gt2018-75601
复制
发表时间：
2018
期刊：
影响因子：
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通讯作者：
Tomoya Murota
中科院分区：
文献类型：
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作者：
K. Yunoki;Tomoya Murota
为了预测火焰前锋的位置，我们采用大涡模拟（LES），并将它的燃烧模型，混合湍流燃烧模型（HTC模型），适用于任何火焰模式。我们采取先前获得的测试结果的轴对称射流贫油预混火焰在圆柱形燃烧室在高压和调查的影响当量比的变化对火焰前锋的位置。这些测试的全部细节可在文献中获得。我们发现火焰前锋点的轴向位置的模拟结果，定义的OH浓度分布的拐点，显示出良好的协议与测试结果（小于4%的差异）。因此，我们的结论是，HTC模型是能够捕捉到实际观察到的趋势时，改变当量比和HTC模型与LES的组合表明，火焰拉伸效应是重要的，以预测火焰前锋位置稀薄预混燃烧。
To predict the flame front position, we adopt the large eddy simulation (LES) and incorporate into it a combustion model, the hybrid turbulent combustion model (HTC model), applicable to any flame mode. We take previously obtained test results for the axisymmetric jet lean premixed flame in a cylindrical chamber at high pressure and investigate the effects of equivalence ratio variation on flame front positions. Full details of these tests are available in the literature. We find the simulation results of the axial positions of the flame front points, defined by the inflection point of the OH concentration distributions, show good agreement with test results (less than 4% difference between them). Therefore, we conclude that the HTC model is capable of capturing the actually observed tendency when changing the equivalence ratios and that the combination of the HTC model with LES suggests that flame stretch effect is important to predict the flame front position for lean premixed combustion.