刘胜佳,张光学*,马振方,王进卿,詹明秀,池作和,刘宇.低雷诺数下团聚体细颗粒阻力修正系数的实验研究[J].实验力学,2019,34(5):819~823 |
低雷诺数下团聚体细颗粒阻力修正系数的实验研究 |
Experimental study of aggregate fine particle drag correction coefficient at low Reynolds number |
投稿时间:2018-04-19 修订日期:2018-06-28 |
DOI:10.7520/1001-4888-18-078 |
中文关键词: 细颗粒物 团聚体 阻力修正系数 夹角 分形维数 |
英文关键词:particles aggregates drag correction coefficients angle fractal dimension |
基金项目:国家重点研发计划“国家质量基础的共性技术研究与应用”重点专项(编号2017YFF0205006);浙江省科技计划项目(2017F30026) |
|
摘要点击次数: 500 |
全文下载次数: 183 |
中文摘要: |
对团聚体状细颗粒的阻力修正系数进行落球法实验研究,得到颗粒粒径比、团聚体颗粒与流场夹角、规则团聚体颗粒自身夹角和不规则团聚体的分形维数等参数对阻力修正系数的影响。结果表明,团聚体所含颗粒的粒径之比越大,其阻力修正系数越大;团聚体颗粒阻力修正系数随团聚体与流场夹角的增大而增大;团聚体颗粒自身夹角越大,阻力修正系数越大,团聚体颗粒自身夹角越接近0°,其阻力修正系数越接近于1。对于不规则团聚体颗粒,阻力修正系数随分形维数的增大而减小。 |
英文摘要: |
In this paper, the drag correction coefficient of aggregate fine particle is studied by falling ball method. The influence of particle size ratio, angle between aggregate particle and flow field, angle of regular aggregate fine particle itself and irregular aggregate fractal dimension etc. on drag correction coefficient was obtained. Experimental results indicate that the larger the particle size ratio is, the greater the drag correction coefficient. Drag correction coefficient increases with the increase of angles between aggregate and flow field. The larger the angle of aggregate particles is, the greater the drag correction coefficient, and when the angle of aggregate particle itself is close to 0°, the drag correction coefficient is approaching to 1. For irregular aggregate particles, drag correction coefficient decreases with the increase of fractal dimension. |
查看全文 下载PDF阅读器 |
关闭 |