| 纳米SiO2颗粒在二维声场流化床中的流化特性 |
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| 引用本文： | 段蜀波,王亮,周勇,朱家骅.纳米SiO2颗粒在二维声场流化床中的流化特性[J].四川理工学院学报(自然科学版),2005,18(1):1-5. |
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| 作者姓名： | 段蜀波 王亮 周勇 朱家骅 |
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| 作者单位： | 四川大学化学工程学院,四川,成都,610065;四川大学化学工程学院,四川,成都,610065;四川大学化学工程学院,四川,成都,610065;四川大学化学工程学院,四川,成都,610065 |
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| 基金项目： | 国家自然科学基金项目(20176031) |
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| 摘 要： | 以原生纳米SiO2颗粒为物料,在横截面为130×10mm2、高为500mm的二维床中,研究了外加声波频率和声压对纳米颗粒流化特性的影响。结果表明:无声场时,流化过程中会出现裂纹和沟流,临界流化速度较高,有明显的颗粒带出;适当的低频强声波的引入能很好地抑制甚至消除沟流,大大降低流化床中纳米颗粒聚团的尺寸,使之在低气速下实现稳定流化,从而显著改善纳米颗粒的流化质量。
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| 关 键 词： | 纳米颗粒 流态化 聚团 |
| 文章编号： | 1673-1549(2005)01-0001-05 |
| 修稿时间： | 2004年11月26 |
Characteristics of Fine Particles on Planar Sound-assisted Fluidization of Beds |
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| DUAN Shu-bo,WANG Liang,ZHOU Yong,ZHU Jia-hua.Characteristics of Fine Particles on Planar Sound-assisted Fluidization of Beds[J].Journal of Sichuan University of Science & Engineering:Natural Science Editton,2005,18(1):1-5. |
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| Authors: | DUAN Shu-bo WANG Liang ZHOU Yong ZHU Jia-hua |
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| Abstract: | The fluidization characteristics of SiO2 original nano-particles, under different sound pressure levels and frequencies, are investigated in the planar bed which is 130×10 mm2 cross section, 500mm high. The results are shown that without sound field channelling appeared, minimum fluidization velocity is much high and lots of power got away, however when low frequency great sound pressure level added into the bed, channelling is restrained, the size of the clusters became smaller dramatically, the particles is able to fluidize at lower velocity so the quality of the fluidization is improved. |
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| Keywords: | nano-particles fluidization cluster |
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