Computation of Turbulent Flow in a Rotating Pipe using the Elliptic Blending Reynolds Stress Model
Computation of Turbulent Flow in a Rotating Pipe using the Elliptic Blending Reynolds Stress Model
复制标题
使用椭圆混合雷诺应力模型计算旋转管道中的湍流
DOI：
10.2514/6.2016-3943
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发表时间：
2016
期刊：
影响因子：
2.5
通讯作者：
M. Stoellinger
中科院分区：
文献类型：
--
作者：
N. Ashton;M. Stoellinger
利用开放源代码OpenFOAM对标准涡粘模型（Spalart-Allmaras & k−ω SST）和具有均匀湍流耗散率方程的低雷诺数椭圆混合雷诺力模型进行了轴向旋转管道的流动研究。基于Hellsten等人（1998）的工作，对旋转的长度尺度决定方程进行了修正，并对SST和EB-RSM模型进行了评估。结果表明，对于有或没有旋转校正的模型，EB-RSM提供了比海温模型更好的结果，更好地捕捉湍流抑制水平和抛物型周向速度剖面。当对长度尺度决定方程进行理查德森校正时，可以观察到海表温度和EB-RSM模型都有明显的改进，结果与实验数据更加吻合。修正后的EB-RSM的结果与先前的研究非常一致，对湍流扩散模型的进一步改进可能会进一步提高与实验的相关性。海温模型的表现比预期的要好，尽管这两个模型对理查森校正的依赖表明，需要进一步的工作来彻底评估更大范围流动的这种校正的公式。
The flow through a axially rotating pipe is examined using the open-source code OpenFOAM for both standard eddy-viscosity models (Spalart-Allmaras & k−ω SST) and a low-Reynolds number Elliptic Blending Reynolds Stress Model with a homogenous turbulent dissipation rate equation. Corrections to the length-scale determining equation for rotation, based upon the work of Hellsten et al. (1998), are evaluated for both the SST and EB-RSM models. It is shown that for models with or without a rotation correction, the EB-RSM offered improved results over the SST model, better capturing the level of turbulence suppression and the parabolic circumferential velocity profile. A clear improvement to both the SST and EB-RSM models is observed when a Richardson correction is applied to the length-scale determining equations, resulting in much closer agreement to the experimental data. The results for the EB-RSM with this correction are in good agreement with previous studies and further improvements to the turbulent diffusion model would likely improve the correlation to the experiment even further. The performance of the SST model is better than expected although the reliance of both models on the Richardson correction suggests further work is needed to thoroughly assess the formulation of such corrections for a wider range of flows.