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首页> 外文期刊>Flow, turbulence and combustion >Computational investigation of flow through a rotating square duct by means of advanced second-moment closure
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Computational investigation of flow through a rotating square duct by means of advanced second-moment closure

机译：借助先进的第二矩封闭装置，对通过旋转方管的流量进行计算研究

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摘要

The paper presents the application of an advanced second moment closure (SMC) to the prediction of the flow field within stationary and rotating square cross-sectioned ducts. The rotation number is 0.1 and the Reynolds number is 100,000. The SMC used satisfies the two-component-limit and has been reported in literature to produce improvements in the prediction of a wide range of flows. The computations were initially validated against existing experimental data, then used to obtain the various budget terms for the Reynolds stresses. The aims of this work are to judge the performance of the advanced SMC and to gain insight into the physics of rotation and its interaction with secondary flows based on the predicted Reynolds stress budgets for high Reynolds number flows. It was found that the advanced SMC performs slightly better than a basic SMC, although neither model predicts the flow on the suction side of the rotating duct well. On the pressure side computed budgets are similar to those obtained in a significantly higher aspect ratio duct. On the suction side, however, the effects of the secondary flows are clearly seen through a significant decrease of various budget terms, a feature not seen in a higher aspect ratio duct, and it thus appears that the models do not entirely capture the interaction between the stabilizing rotation and secondary flow effects.
机译：本文介绍了先进的第二矩闭合（SMC）在固定和旋转方形截面管道内流场预测中的应用。旋转数为0.1，雷诺数为100,000。所使用的SMC满足了两个组分的限制，并且在文献中已有报道，该方法可以改善各种流量的预测。首先根据现有的实验数据对计算进行了验证，然后将其用于获得雷诺应力的各种预算项。这项工作的目的是判断高级SMC的性能，并基于预测的高雷诺数流的雷诺应力预算，深入了解旋转的物理学及其与二次流的相互作用。已经发现，先进的SMC的性能略好于基本SMC，尽管这两个模型都无法预测旋转导管井的吸入侧的流量。在压力方面，所计算的预算类似于在纵横比大得多的管道中获得的预算。但是，在吸引方面，可以通过大量减少各种预算条款来清楚地看到次要流动的效果，这是在高宽比管道中看不到的特征，因此似乎模型无法完全捕捉到两者之间的相互作用。稳定的旋转和二次流动效应。

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