引用本文:徐磊,颜士开,施伟,王刚,金玉杰,周歆宇,孙世宏.虹吸式出水流道水力性能数值计算湍流模型适用性[J].水利水运工程学报,2019,(4):42-49
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虹吸式出水流道水力性能数值计算湍流模型适用性
徐磊1, 颜士开1, 施伟2, 王刚3, 金玉杰1, 周歆宇1, 孙世宏1
1.扬州大学水利与能源动力工程学院,江苏扬州;2.南水北调东线江苏水源有限责任公司,江苏南京;3.徐州市水利建筑设计研究院,江苏徐州
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,首先采用透明流道模型对某低扬程泵站虹吸式出水流道进行了试验研究,测试了流道水头损失并分析了流道内流态;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,并将计算结果与模型试验结果进行比较。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更具优越性,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,Standard k-ε湍流模型计算得到的流场与模型试验结果最吻合。
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+.2
基金项目:国家自然科学基金资助项目(51309200,51779215);中国博士后科学基金资助项目(2013M540469);江苏省博士后科研基金资助项目(1301021A)
Applicability analysis of turbulence model for numerical calculation of hydraulic performance of siphon outlet conduit
XU Lei1, YAN Shikai1, SHI Wei2, WANG Gang3, JIN Yujie1, ZHOU Xinyu1, SUN Shihong1
1.School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou;2.The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co., Ltd., Nanjing;3.Institute of Water Conservancy Works Design of Xuzhou, Xuzhou
Abstract:
In order to find a turbulence model suitable for numerical calculation of hydraulic performance of the siphon outlet conduit in a large-scale low-head pumping station, a transparent conduit model experiment method is used to conduct experimental studies on the siphon outlet conduit in the large-scale low-head pumping station in this study. The head loss of the flow through the conduit is measured, and the flow regime in the conduit analyzed. Further, based on the grid-independence analysis, some of the commonly-used turbulence models, including the one-equation turbulence model (S-A turbulence model), two-equation turbulence models (k-εturbulence model and k-ω turbulence model), and Reynolds Stress turbulence model, are selected to numerically simulate the hydraulic performances of the siphon outlet conduit with three-dimensional (3D) turbulent flow, and the numerical calculation results are compared with the model test results of the conduit. The research results show that the two-equation turbulence model is superior to the one-equation turbulence model and the Reynolds Stress turbulence model in the calculation of the head loss of the siphon outlet conduit. The relative errors of the head loss calculated by the three two-equation turbulence models (i.e. standard k-ε turbulence model, realizable k-ε turbulence model and SST k-ω turbulence model) are less than 3%. Among them, the flow field calculated by the Standard k-ε turbulence model is the most consistent with the model test results.
Key words:  siphon outlet conduit  hydraulic performance  turbulence model  numerical calculation  model test
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