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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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

曾卓雄^a,b; 周力行^a; 祁海鹰^c

^aDepartment of Engineering Mechanics, Tsinghua University, Beijing 100084, China
^b Department of Mechanical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China ^c Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-28 发布日期:2007-02-28
通讯作者: 曾卓雄

Large eddy simulation of particle wake effect and RANS simulation of turbulence modulation in gas-particle flows

ZENG Zhuoxiong^a,b; ZHOU Lixing^a; QI Haiying^c

^a Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
^b Department of Mechanical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China ^c Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Received:1900-01-01 Revised:1900-01-01 Online:2007-02-28 Published:2007-02-28
Contact: ZENG Zhuoxiong

摘要/Abstract

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 results. 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 turbu-lence modulation in much better agreement with the experimental results

关键词: large eddy simulation;gas-particle flow;turbulence modulation

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 results. 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 turbu-lence modulation in much better agreement with the experimental results

Key words: large eddy simulation, gas-particle flow, turbulence modulation

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]. , DOI: .

ZENGZhuoxiong,ZHOULixing, QIHaiying. Large eddy simulation of particle wake effect and RANS simulation of turbulence modulation in gas-particle flows[J]. , DOI: .

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