Numerical investigations of vortex flows and vortex suppression schemes in a large pumping-station sump
Numerical investigations of vortex flows and vortex suppression schemes in a large pumping-station sump
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DOI：
10.1177/2041298310393447
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
X. Tang;Fujun Wang;Y. Li;G. Cong;X. Shi;Y. Wu;L. Qi
中科院分区：
文献类型：
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作者：
X. Tang;Fujun Wang;Y. Li;G. Cong;X. Shi;Y. Wu;L. Qi
本文采用商用计算流体力学程序对我国在建的某大型离心泵站内的三维旋涡流动进行了数值模拟，并提出了相应的消涡方案。针对水泵吸水池内旋涡流动的复杂性，首次采用标准k-ε、重归一化群k-ε和可实现k-ε湍流模型，对开式水泵吸水池小型物理模型内的流动进行了数值模拟，并对吸水池内各种旋涡流线和强度进行了预测、分析，与实验结果进行了比较。结果表明，可实现的k-ε模型较其它两种模型能更准确地预测自由表面涡、附壁涡和附壁涡的位置和强度。然后，采用可实现的k-ε模型对大型泵站进水池内的三维旋涡流动进行了数值模拟。所有的各种涡，如自由表面，附壁涡，成功地预测。根据计算得到的涡的位置、形状、大小和强度等信息，提出了三种消涡装置，并分析了其消涡效果。研究结果可为惠南庄泵站今后的安全稳定运行提供参考。
This work uses a commercial computational fluid dynamics code to predict three-dimensional (3D) vortex flows in a large centrifugal-pump station under construction in China and proposes relevant vortex-eliminating schemes. Because of the complex nature of the vortex flows in sumps, different turbulence models, namely, standard k–ε, re-normalization group k–ε and realizable k–ε models, are first used to investigate their feasibility in predicting flows in a small physical model of an open pump sump, and various vortex streamlines and strength in the sump are predicted, analysed, and compared with the experimental data. The comparisons show that the realizable k–ε model predicts the position and strength of free-surface, sidewall-attached, and floor-attached vortices more accurately than the other two models. Then, the realizable k–ε model is used here to investigate 3D vortex flows in a large pumping-station sump. All the various vortices, such as free-surface, wall-attached vortices, are successfully predicted. Thus, based on the information of location, shape, size, and strength of the calculated vortices, three types of vortex-eliminating devices are proposed and their corresponding vortex suppression effects are analysed. These results will be used as reference for the safe and stable operation of the Hui–Nan–Zhuang pumping station in the future.