| 颗粒尾涡增强湍流的大涡模拟以及气固两相流中湍流变动的数值模拟 |
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| 引用本文： | ,曾卓雄,周力行,祁海鹰. 颗粒尾涡增强湍流的大涡模拟以及气固两相流中湍流变动的数值模拟[J]. 中国化学工程学报, 2007, 15(1): 12-16. DOI: 10.1016/S1004-9541(07)60027-5 |
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| 作者姓名： | 曾卓雄 周力行 祁海鹰 |
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| 作者单位： | [1]Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China [2]Department of Mechanical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China [3]Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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| 基金项目： | 国家自然科学基金，国家自然科学基金 |
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| 摘 要： | The turbulence enhancement by particle wake effect is studied by large eddy simulation （LES） of turbulent gas flows passing a single particle. The predicted time-averaged and root-mean-square fluctuation velocities behind the particle are in agreement with the Reynolds-averaged Navier-Stokes modeling results and experimental results. A semi-empirical turbulence enhancement model is proposed by the present-authors based on the LES resuits. This model is incorporated into the second-order moment two-phase turbulence model for simulating vertical gas-particle pipe flows and horizontal gas-particle channel flows. The simulation results show that compared with the model not accounting for the particle wake effect, the present model gives simulation results for the gas turbulence modulation in much better agreement with the experimental results.
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| 关 键 词： | 大涡流模拟 RANS模型 粒子伴流效应 气体-粒子流 湍流调制 |
| 收稿时间： | 2005-11-28 |
| 修稿时间： | 2005-11-282006-05-30 |
Large eddy simulation of particle wake effect and RANS simulation of turbulence modulation in gas-particle flows |
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| ZENG,nbsp,Zhuoxiong,,nbsp,ZHOU,nbsp,Lixing,QI,nbsp,Haiying. Large eddy simulation of particle wake effect and RANS simulation of turbulence modulation in gas-particle flows[J]. Chinese Journal of Chemical Engineering, 2007, 15(1): 12-16. DOI: 10.1016/S1004-9541(07)60027-5 |
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| Authors: | ZENG Zhuoxiong ZHOU Lixing QI Haiying |
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| Affiliation: | 1, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China ;2, Department of Mechanical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China ;3, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | The turbulence enhancement by particle wake effect is studied by large eddy simulation (LES) of turbulent gas flows passing a single particle. The predicted time-averaged and root-mean-square fluctuation velocities behind the particle are in agreement with the Reynolds-averaged Navier-Stokes modeling results and experimental results. A semi-empirical turbulence enhancement model is proposed by the present-authors based on the LES resuits. This model is incorporated into the second-order moment two-phase turbulence model for simulating vertical gas-particle pipe flows and horizontal gas-particle channel flows. The simulation results show that compared with the model not accounting for the particle wake effect, the present model gives simulation results for the gas turbulence modulation in much better agreement with the experimental results |
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| Keywords: | large eddy simulation gas-particle flow turbulence modulation |
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