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首页> 外文期刊>International Journal of Heat and Fluid Flow >Validation of an IDDES-type turbulence model and application to a Francis pump turbine flow simulation in comparison with experimental results
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Validation of an IDDES-type turbulence model and application to a Francis pump turbine flow simulation in comparison with experimental results

机译:与实验结果相比,IDDES型湍流模型的验证及其在弗朗西斯泵水轮机流动仿真中的应用

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摘要

In this work we demonstrate the superiority of the IDDES turbulence model approach compared to the RANS formulation at the application of a Francis pump turbine flow simulation at part load conditions. At this operating point strongly swirling flow occurs in the draft tube, which leads to the vortex rope phenomenon, a rotating vortex around the stagnant region in the centre of the diffuser flow leading to a local low pressure zone.
机译:在这项工作中,我们展示了在部分负载条件下应用弗朗西斯泵涡轮流量模拟时,与RANS公式相比,IDDES湍流模型方法的优越性。在这个工作点,在引流管中产生强烈的涡流,这导致了涡流绳现象,即围绕扩散器流中心停滞区域的旋转涡流导致局部低压区域。

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