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用改进的RNG κ-ε模型模拟旋风分离器内的强旋流动
引用本文:王江云,毛羽,刘美丽,王娟.用改进的RNG κ-ε模型模拟旋风分离器内的强旋流动[J].石油学报(石油加工),2010,26(1).
作者姓名:王江云  毛羽  刘美丽  王娟
作者单位:中国石油大学重质油国家重点实验室,北京,102249
基金项目:国家重点基础研究发展规划"973"项目 
摘    要:在RNG k-ε湍流模型的基础上,对模型常数和近壁面处理方法加以改进,并将其应用于旋风分离器内强旋流动的数值模拟。将计算结果与标准的k-ε模型、RNG k-ε模型、Reynolds应力输运模型和实验数据进行比较。结果表明,用改进的RNG k-ε湍流模型得到的数值结果与标准的k-ε模型、 模型相比准确性具有显著的提高。改进的RNG k-ε湍流模型和Reynolds应力输运模型对旋风分离器内流场分布的预测与实验结果比较吻合,并且前者所需计算时间却大大缩短,更适合工业上应用。随后采用欧拉-拉格朗日模型(湍流模型为:Reynolds应力输运模型)和欧拉-欧拉模型(湍流模型为:改进的RNG k-ε模型)分别对旋风分离器内的气固两相流动进行计算,考察了旋风分离器内的颗粒浓度分布特点。结果表明,使用改进的RNG k-ε湍流模型的欧拉多相流模型也可以较好的重现旋风分离器内的气固两相流动特点,并应用于旋风分离器的优化设计。

关 键 词:旋风分离器  湍流模型  两相流模型  颗粒浓度分布  数值模拟
收稿时间:2008-10-30
修稿时间:2009-5-31

NUMERICAL SIMULATION OF STRONGLY SWIRLING FLOW IN CYCLONE SEPARATOR BY USING AN ADVANCED RNG κ-ε MODEL
WANG Jiangyun,MAO Yu,LIU Meili,WANG Juan.NUMERICAL SIMULATION OF STRONGLY SWIRLING FLOW IN CYCLONE SEPARATOR BY USING AN ADVANCED RNG κ-ε MODEL[J].Acta Petrolei Sinica (Petroleum Processing Section),2010,26(1).
Authors:WANG Jiangyun  MAO Yu  LIU Meili  WANG Juan
Affiliation:WANG Jiangyun,MAO Yu,LIU Meili,WANG Juan(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China)
Abstract:Based on the renormalization group (RNG) κ-ε turbulence model, the model coefficient and near-wall treatment were modified. The modified RNG κ-ε turbulence model was applied to the numerical simulation of single-phase strongly rotational flow in a cyclone separator. And the simulation results of RNG κ-ε model, the advanced RNG κ-ε model and Reynolds stress model (RSM) were compared with the experimental data. Then, numerical simulation of the gas and solid phase flows in cyclone separator was carried out by applying Eulerian-Lagrangian model (Turbulence flow model of RSM) and Eulerian-Eulerian model (Turbulence flow model of the advanced RNG κ-ε model) respectively. The effects of different two-phase models on the flow behaviour and solid distribution in cyclone separator were studied. It was shown that the agreement between the results of the advanced RNG κ-ε model and RSM and those of experiments were obtained. The advanced RNG κ-ε model can be more useful in practical engineering calculation due to its time-consuming dramatically decreased. The Eulerian-Eulerian model (Turbulence flow model of the advanced RNG κ-ε model) also can preferably reappear the flow characteristics in cyclone separator, which can be useful for design optimization of cyclone separators.
Keywords:cyclone separator  turbulence flow model  two-phase model  solid distribution  numerical simulation
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