Computational modelling of turbulent Taylor–Couette flow for bearing chamber applications: A comparison of unsteady Reynolds-averaged Navier–Stokes models
Computational modelling of turbulent Taylor–Couette flow for bearing chamber applications: A comparison of unsteady Reynolds-averaged Navier–Stokes models
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轴承室应用中的泰勒-库埃特湍流计算模型：非稳态雷诺平均纳维-斯托克斯模型的比较
DOI：
10.1177/09576509221075516
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
R. Jefferson
中科院分区：
文献类型：
--
作者：
A. Nicoli;K. Johnson;R. Jefferson
在旋转泰勒-库埃特系统中精确模拟流体流动的能力在通知旋转机械的计算研究中具有主要作用。关于建模方法的选择存在相当大的不确定性，包括合适的湍流模型，该模型可以准确地解决这种复杂流动中的湍流，同时保持工业相关应用的计算可行性。利用ANSYS Fluent软件对轴对称和三维非定常雷诺平均Navier-Stokes（URANS）湍流模型进行了数值比较。计算流体动力学几何形状是已发表的实验测量结果的代表。对于Taylor-Couette研究，根据以前发表的研究结果，对内缸启动过程进行了调查，证实了流动的最终状态高度依赖于初始条件和加速度。一旦泰勒涡流形成并稳定，它们就不会被内圆柱速度的小步骤所破坏，从而允许计算上有效的加速。应用旋转周期性的研究不成功，导致核心速度显著降低。轴对称的预测提供了合理的协议，只有在低转速的实验数据。对于整个360°区域的三维模拟，获得了速度流场的良好预测，径向速度的差异小于5%。在URANS模型中，标准k-ω模型和基线雷诺应力模型（BSL-RSM）提供了最接近的协议，公布的实验数据。在本文中，开发的泰勒-库埃特湍流建模方法扩展到轴承腔的几何形状。二次涡流场的分析进行了比较，定性和定量发表轴承室的实验测量。总的来说，虽然使用标准k-ω湍流模型仍然发现了良好的一致性，但BSL-RSM出现了差异。然而，对于这种比泰勒-库埃特流更复杂的轴承室环境，剪切应力传输k-ω湍流模型提供了最接近的一致性，建议用于未来的轴承室建模。
The capability to accurately model fluid flow within rotating Taylor–Couette systems has a primary role in informing computational investigations of rotating machinery. There is considerable uncertainty regarding selection of modelling approach, including a suitable turbulence model, that can accurately resolve turbulence within such complex flows while remaining computationally feasible for industrially relevant applications. This paper presents a numerical comparison of axisymmetric and three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) turbulence models within ANSYS Fluent. The CFD geometries are representative of ones for which there are published experimental measurements. For the Taylor–Couette study, investigation into inner cylinder start-up procedure, based on previous published findings, confirmed that the final state of the flow is highly dependent on the initial conditions and acceleration rate. Once Taylor vortices form and stabilise, they are not disrupted by small steps in inner cylinder speed, allowing computationally efficient accelerations. Investigations into applying rotational periodicity were unsuccessful, resulting in a significantly reduced core velocity. Axisymmetric predictions provided reasonable agreement with experimental data only at low rotation rates. A good prediction of the velocity flow field was obtained for three-dimensional simulations of the full 360° domain with differences of less than 5% for radial velocities. Among the URANS models, the standard k-ω model and baseline Reynolds stress model (BSL-RSM) provided the closest agreement to published experimental data. In the paper, the developed Taylor–Couette turbulence modelling methodology is extended to a bearing chamber geometry. Analysis of the secondary vortex flow field is compared both qualitatively and quantitatively to published bearing chamber experimental measurements. Overall, whilst a good agreement is still found using the standard k-ω turbulence model, discrepancies arise with the BSL-RSM. However, for this more complex bearing chamber environment compared to a Taylor–Couette flow, the shear stress transport k-ω turbulence model provided the closest agreement and is recommended for future bearing chamber modelling.
对 Re = 30 000 的 TaylorâCouette 流动中的局部和全局扭矩进行直接数值模拟
影响因子：
3.7
作者：
H. Brauckmann;B. Eckhardt
通讯作者：
B. Eckhardt