| 三维混合层中大涡结构与扩散颗粒的相互作用 |
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| 引用本文： | 罗坤,郑友取,樊建人,岑可法.三维混合层中大涡结构与扩散颗粒的相互作用[J].中国化学工程学报,2003,11(4):377-382. |
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| 作者姓名： | 罗坤 郑友取 樊建人 岑可法 |
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| 作者单位： | [1]InstituteforThermalPowerEngineering,ZhejiangUniversity,Hangzhou310027,China [2]DepartmentofMechanicalEngineering,ZhejiangUniversityofScienceandTechnology,Hangzhou310012,China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (No. 50236030, No. 50076038) and the Major State Basic Research Development Program of China (No. G19990222). |
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| 摘 要： | In order to understand the interaction between large-scale vortex structure and particles, a two-way coupling temporal mixing layer laden with particles at a Stokes number of 5 with different mass loading planted initially in the upper half region is numerically studied. The pseudospectral method is used for the flow fluid and the Lagrangian approach is employed to trace particles. The momentum coupling effect introduced by a particle is approximated to a point force. The simulation results show that the coherent structures are still dominant in the mixing layer, but the large-scale vortex structure and particle dispersion are modulated. The length of large-scale vortex structure is shortened and the pairing is delayed. At the same time, the particles are distributed more evenly in the whole flow field as the mass loading is increased, but the particle dispersion along the transverse direction differs from that along the spanwise direction, which indicates that the effect by the addition of particle on the suanwise large-scale vortex structure is different from the streamwise counterpart.
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| 关 键 词： | 三维混合层 大涡结构 颗料扩散 相互作用 流体运动 |
| 修稿时间： | |
Interaction between large-scale vortex structure and dispersed particles in a three dimensional mixing layer |
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| LUO Kun,ZHENG Youqu,FAN Jianren,CEN Kefa.Interaction between large-scale vortex structure and dispersed particles in a three dimensional mixing layer[J].Chinese Journal of Chemical Engineering,2003,11(4):377-382. |
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| Authors: | LUO Kun ZHENG Youqu FAN Jianren CEN Kefa |
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| Affiliation: | Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China Department of Mechanical Engineering, Zhejiang University of Science and Technology, Hangzhou 310012, China |
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| Abstract: | In order to understand the interaction between large-scale vortex structure and particles, a two-way coupling temporal mixing layer laden with particles at a Stokes number of 5 with different mass loading planted initially in the upper half region is numerically studied. The pseudospectral method is used for the flow fluid and the Lagrangian approach is employed to trace particles. The momentum coupling effect introduced by a particle is approximated to a point force. The simulation results show that the coherent structures are still dominant in the mixing layer, but the large-scale vortex structure and particle dispersion are modulated. The length of large-scale vortex structure is shortened and the pairing is delayed. At the same time, the particles are distributed more evenly in the whole flow field as the mass loading is increased, but the particle dispersion along the transverse direction differs from that along the spanwise direction, which indicates that the effect by the addition of particle on the spanwise large-scale vortex structure is different from the streamwise counterpart. |
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| Keywords: | interaction modulation two-way coupling large-scale vortex structures particle dispersion |
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