| 湍流模型对过冷沸腾计算影响分析 |
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| 引用本文： | 张蕊,田文喜,丛腾龙,苏光辉,秋穗正. 湍流模型对过冷沸腾计算影响分析[J]. 原子能科学技术, 2015, 49(8): 1366-1373. DOI: 10.7538/yzk.2015.49.08.1366 |
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| 作者姓名： | 张蕊 田文喜 丛腾龙 苏光辉 秋穗正 |
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| 作者单位： | 1.西安交通大学 动力工程与多相流国家重点实验室，陕西 西安710049;2.西安交通大学 核科学与技术学院，陕西 西安710049 |
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| 摘 要： | 采用ANSYS FLUENT14.5分析湍流模型对过冷沸腾的影响,建立多套网格,每套网格采用不同的湍流模型、壁面函数及两相湍流处理方法,将计算结果与基准实验数据进行对比,分析网格、湍流模型、壁面函数及两相湍流处理方法对计算精度的影响。通过分析发现:k-ε模型的计算精度高于k-ω模型的;Dispersed方法和Per Phase方法的计算精度相对于Mixture的无明显提升;增强壁面函数对Y+≈1的网格无法获得满意的计算结果。
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| 关 键 词： | 过冷沸腾 湍流模型 计算精度 |
Effect of Turbulence Model on Prediction of Subcooled Boiling |
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| ZHANG Rui,TIAN Wen-xi,CONG Teng-long,SU Guang-hui,QIU Sui-zheng. Effect of Turbulence Model on Prediction of Subcooled Boiling[J]. Atomic Energy Science and Technology, 2015, 49(8): 1366-1373. DOI: 10.7538/yzk.2015.49.08.1366 |
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| Authors: | ZHANG Rui TIAN Wen-xi CONG Teng-long SU Guang-hui QIU Sui-zheng |
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| Affiliation: | 1.State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2.School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China |
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| Abstract: | The ANSYS FLUENT14.5 was employed to simulate the two-phase forced convection subcooled boiling in a vertical heated pipe. Different turbulence models, wall functions and two-phase turbulence treatments were utilized to each of four sets of grids. Results were compared with experiment data to analyze the effects of grids, turbulence model, wall functions and two-phase turbulence treatments. The results of k-ε model show better agreement with experiment data than those of k-ω model. Dispersed and Per Phase treatments for two-phase turbulence parameters perform no better than Mixture treatment. The enhanced wall function can’t achieve satisfactory results for the grid with near wall function Y+≈1. |
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| Keywords: | subcooled boiling turbulence model calculation accuracy |
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