陆伟刚,王东伟,徐〓磊,周歆宇,孙世宏.湍流模型在肘形进水流道三维流场数值模拟中的适用性研究[J].水电能源科学,2018,36(9):110-113
湍流模型在肘形进水流道三维流场数值模拟中的适用性研究
Applicability of Turbulence Model in 3 D Flow Filed Numerical Simulation of Elbow Inlet Conduit
  
DOI:
中文关键词:  低扬程泵站  肘形进水流道  三维流场  湍流模型  数值模拟  模型试验
英文关键词:low head pumping station  elbow inlet conduit  3D flow field  turbulence model  numerical simulation  model test
基金项目:国家自然科学基金项目(51309200,51779215);中国博士后科学基金项目(2013M540469);江苏省博士后科研基金项目(1301021A)
作者单位
陆伟刚,王东伟,徐〓磊,周歆宇,孙世宏 扬州大学 水利与能源动力工程学院 江苏 扬州 225127 
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中文摘要:
      为找到可准确模拟低扬程泵站肘形进水流道水流流动的湍流模型,在对肘形进水流道进行网格无关性分析的基础上,选用S A、Standard κ ε、RNG κ ε、Realizable κ ε、Standard κ ω、SST κ ω和RSM等7种常用湍流模型分别对肘形进水流道三维湍流流动进行数值模拟,并从流道水头损失和流态两个方面与流道模型试验结果进行比较。结果表明,不同湍流模型满足网格无关性所需的网格数量不同,RNG κ ε、Realizable κ ε和S A湍流模型数值模拟的水力损失与模型试验结果的相对误差分别为1.01%、7.07%、9.09%,RNG κ ε与Realizable κ ε湍流模型计算得到的流场几乎完全相同,建议在对肘形进水流道三维湍流流动进行数值模拟时优先考虑采用RNG κ ε湍流模型。研究成果可为进水流道三维湍流流动数值模拟的模型选择提供依据。
英文摘要:
      In order to find the turbulence model which can be used to accurately simulate the flow in elbow inlet conduit of low head pumping station, based on the grid independent analysis of the elbow inlet conduit, sevens common turbulence models, such as S A, Standard κ ε, RNG κ ε, Realizable κ ε, Standard κ ω, SST κ ω, and RSM, were chosen to simulate the flow in elbow inlet conduit respectively. And then the simulation results were compared with the model test from the aspects of hydraulic loss and flow pattern. The results indicate that different turbulence model needs different grid numbers to meet the grid independent requirement. The hydraulic loss relative errors of numerical simulation results and model test are 1.01%, 7.07% and 9.09% for the RNG κ εturbulence model, Realizable κ ε turbulence model and S A turbulence model, respectively. The flow fields of the elbow inlet conduit simulated by the RNG κ ε turbulence model and Realizable κ ε turbulence model are mostly the same. It is suggestion that RNG κ ε turbulence model should be the first choice when the flow of elbow inlet conduit is simulated. The research results can provide a basis for model selection of numerical simulation of three dimensional turbulent flow in the inlet conduit.
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