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首页> 外文期刊>International Journal of Heat and Mass Transfer >A TWO-EQUATION TURBULENCE MODEL AND ITS APPLICATION TO A BUOYANT DIFFUSION FLAME
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A TWO-EQUATION TURBULENCE MODEL AND ITS APPLICATION TO A BUOYANT DIFFUSION FLAME

机译：两方程湍流模型及其在浮力扩散火焰中的应用

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摘要

A modified k-ω two-equation turbulence model was developed to improve the consideration of the important buoyancy effect on turbulence and turbulent transport, which is a serious deficiency of the standard buoyancy-modified k-ωmodel. The present model was tested against both plane and axisymmetric thermal plumes and a buoyant diffusion flame. The model was found to be stable, computationally economic, promising and applicable to complex situations. The predicted plume spreading rates and velocity and temperature profiles agreed well with experimental measurements. When compared with the standard buoyancy-modified k-ω turbulence model, this model gives significantly improved numerical results.
机译：为了改进对湍流和湍流输送的重要浮力影响的考虑，开发了一种改进的k-ω两方程湍流模型，这是标准浮力修正k-ω模型的严重缺陷。针对平面和轴对称热羽以及浮力扩散火焰对本模型进行了测试。发现该模型是稳定的，计算上经济的，有希望的并且适用于复杂情况。预测的羽流散布速率，速度和温度曲线与实验测量结果非常吻合。与标准浮力修正k-ω湍流模型相比，该模型可提供显着改善的数值结果。

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