Evaluations of SGS Combustion, Scalar Flux and Stress Models in a Turbulent Jet Premixed Flame
Evaluations of SGS Combustion, Scalar Flux and Stress Models in a Turbulent Jet Premixed Flame
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湍流射流预混火焰中 SGS 燃烧、标量通量和应力模型的评估
DOI：
10.1007/s10494-016-9756-z
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发表时间：
2016
影响因子：
2.4
通讯作者：
Toshio Miyauchi
中科院分区：
文献类型：
--
作者：
Katsuhiro Hiraoka;Yoshitsugu Naka;Masayasu Shimura;Yuki Minamoto;Naoya Fukushima;Mamoru Tanahashi;Toshio Miyauchi
利用氢-空气湍流平面射流预混火焰的DNS数据，对新建立的分形动态SGS （FDSGS）燃烧模型和尺度自识别混合SGS （SSRM）应力模型以及其他SGS燃烧、标量通量和应力模型进行了优先和后向评价。后置实验表明，利用FDSGS燃烧模型的LES可以很好地预测燃烧场的平均温度分布和过滤后反应过程变量波动横向分布中的峰值位置。对标量通量模型的优先后检验表明，Clark等人提出的模型准确地预测了反梯度输运和梯度扩散，将Clark等人的模型引入到LES中，对过滤后的过程变量波动的预测略好于梯度扩散模型。对应力模型的评价表明，与Smagorinsky模型相比，SSRM模型能较好地预测速度波动。
A newly developed fractal dynamic SGS (FDSGS) combustion model and a scale self-recognition mixed (SSRM) SGS stress model are evaluated along with other SGS combustion, scalar flux and stress models ina priorianda posteriorimanners using DNS data of a hydrogen-air turbulent plane jet premixed flame.A posterioritests reveal that the LES using the FDSGS combustion model can predict the combustion field well in terms of mean temperature distributions and peak positions in the transverse distributions of filtered reaction progress variable fluctuations.A priorianda posterioritests of the scalar flux models show that a model proposed by Clark et al. accurately predicts the counter-gradient transport as well as the gradient diffusion, and introduction of the model of Clark et al. into the LES yields slightly better predictions of the filtered progress variable fluctuations than that of a gradient diffusion model. Evaluations of the stress models reveal that the LES with the SSRM model predicts the velocity fluctuations well compared to that with the Smagorinsky model.