| 摘要: |
| 为寻求适用于大型低扬程泵站虹吸式出水流道水力性能数值计算的湍流模型,本文首先采用透明流道模型试验方法对某低扬程泵站虹吸式出水流道进行了透明流道模型试验研究,测试了流道水头损失并分析了流道内的流态；在网格无关性分析的基础上,选择常用的一方程湍流模型(S-A湍流模型)、二方程湍流模型(k-ε湍流模型、k-ω湍流模型)及Reynolds Stress湍流模型分别对该虹吸式出水流道水力性能进行了三维湍流流动数值计算,并将流道数值计算结果与模型试验结果进行了比较。结果表明：与一方程湍流模型和Reynolds Stress湍流模型相比,二方程湍流模型在虹吸式出水流道水头损失的计算中展现了优越的适用性,采用Standard k-ε、Realizable k-ε和SST k-ω等3种二方程湍流模型计算得到的流道水头损失相对误差小于3%,其中,采用Standard k-ε湍流模型计算得到的流场与模型试验结果基本相同。 |
| 关键词: 虹吸式出水流道 水力性能 湍流模型 数值计算 模型试验 |
| DOI： |
| 分类号:TV136 |
| 基金项目:国家自然科学基金(51309200)；中国博士后科学基金(2013M540469)；江苏省博士后科研基金(1301021A) |
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| Turbulence model applicability of numerical calculation for the hydraulic performance of siphon outlet conduit |
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XU Lei, YAN Shikai, JIN Yujie, ZHOU Xinyu, SUN Shihong
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School of Hydraulic Energy and Power Engineering,Yangzhou University
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| Abstract: |
| In order to find the turbulence model that is applicable to the numerical calculation of the siphon outlet conduit hydraulic performance, model test for the siphon outlet conduit of a large pumping station with low head has been completed firstly, the conduit hydraulic loss was tested, and the flow pattern in the conduit was analyzed. Based on grid-independent analysis, three-dimension turbulent flow in the siphon outlet conduit was calculated by using the commonly turbulence model such as one-equation model (S-A model), the two-equation model (k -ε model, k -ω model) and the Reynolds Stress model, and the calculated results are compared with the model test results. The compared results indicate that as follows: compared with the one-equation turbulence model and the Reynolds Stress model, two-equation turbulence model show the superiority in the conduit hydraulic loss calculation; the relative error of hydraulic loss is lower than 3% by using the two-equation turbulence models which are Standard K-ε turbulence model, Realizable K-ε turbulence model and SST k -ω turbulence model; the flow field calculated by the Standard k -ε turbulence model is agree with the model test results. |
| Key words: siphon outlet conduit hydraulic performance turbulence model numerical calculation model test |
