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| 提升管内稠密气粒两相流动大涡模拟 | |
| 引用本文： | 向屏,郭印诚. 提升管内稠密气粒两相流动大涡模拟[J]. 工程热物理学报, 2004, 0(Z1) |
| 作者姓名： | 向屏 郭印诚 |
| 作者单位： | [1]清华大学工程力学系 [2]清华大学工程力学系 北京 |
| 基金项目： | 国家自然科学基金资助项目(No.50376028) |
| 摘 要： | 本文采用双流体模型,引入颗粒动力学理论,对提升管内的稠密气粒两相流动进行了大涡模拟。采用改进的分步投影法对滤波后的方程进行显式求解,小尺度量采用Smagorinsky亚格子模式模拟。模拟结果给出的颗粒相速度分布、浓度分布与实验值基本吻合,气固两相存在速度滑移。模拟结果合理预报出了提升管内的环-核流动结构。 |
| 关 键 词： | 大涡模拟 气粒两相流动 提升管 |
MODELING THE HYDRODYNAMICS OF DENSE GAS-PARTICLE FLOW IN A RISER BY LES |
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| XIANG Ping GUO Yin-Cheng. MODELING THE HYDRODYNAMICS OF DENSE GAS-PARTICLE FLOW IN A RISER BY LES[J]. Journal of Engineering Thermophysics, 2004, 0(Z1) | |
| Authors: | XIANG Ping GUO Yin-Cheng |
| Abstract: | Based on the two-fluid modei, large eddy simulation (LES) with two-way coupling is performed for two-dimensional gas-particle flow in a riser. The kinetic theory of granular medium is introduced to describe the particle fluctuation behaviours. The motions of small-scale structures of the two phases are both described by Smagorinsky SGS modei. The predicted time-averaged results are in reasonable agreement with the experimental data, which well depict the non-uniform distributions of the particles in both axial and radial directions in the riser. The temporal lift and acceleration process of particles in the riser is given, which shows the core-annulus flow structures. |
| Keywords: | large eddy simulation gas-particle flows riser |
| 本文献已被 CNKI 维普 等数据库收录！ | |