| 气膜冷却计算中湍流黏性系数的修正 |
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| 引用本文： | 李雪英,任静,蒋洪德. 气膜冷却计算中湍流黏性系数的修正[J]. 工程热物理学报, 2011, 0(4): 573-576 |
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| 作者姓名： | 李雪英 任静 蒋洪德 |
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| 作者单位： | 清华大学热能工程系; |
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| 基金项目： | 国家973项目(No.2007CB210100) |
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| 摘 要： | 燃气轮机高温叶片气膜冷却中的复杂涡系结构使得流动传热很难被准确预测.本文基于平板气膜冷却数值和实验研究结果,指出雷诺平均算法中常用的湍流模型在射流侧向输运和二次涡的捕捉上具有相当的局限性.文中对湍流黏性系数提出了各向异性对数率涡黏模型(ALEV模型)修正,基于ALEV模型修正后的湍流模型增强了射流的侧向输运,减弱了二次...
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| 关 键 词： | 气膜冷却 湍流涡黏系数 湍流普朗特数 各向异性修正 |
Improved Eddy-Viscosity Modelling of Film Cooling Flows |
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| LI Xue-Ying REN Jing JIANG Hong-De. Improved Eddy-Viscosity Modelling of Film Cooling Flows[J]. Journal of Engineering Thermophysics, 2011, 0(4): 573-576 |
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| Authors: | LI Xue-Ying REN Jing JIANG Hong-De |
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| Affiliation: | LI Xue-Ying REN Jing JIANG Hong-De (Department of Thermal Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The unsteady coherent structure is typical in the flow field of the film cooling system in the industrial gas turbines.The sophisticated anisotropic structure is a knot for an accurate numerical algorithm.The comparison between the computation and experiment results of a flat plate film cooling in this study shows that the traditional eddy-viscosity based RANS turbulent models have a considerable limitation on the capture of the lateral spreading and the secondary vortices in the jet.Therefore,an Anisotropi... |
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| Keywords: | film cooling turbulent eddy viscosity turbulent Prandtl number anisotropic correction |
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