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纳米粉体连续高压分散装置的特性研究

袁方洋 崔政伟

袁方洋,崔政伟. 纳米粉体连续高压分散装置的特性研究[J]. 机械科学与技术,2020,39(8):1288-1294 doi: 10.13433/j.cnki.1003-8728.20190270
引用本文: 袁方洋,崔政伟. 纳米粉体连续高压分散装置的特性研究[J]. 机械科学与技术,2020,39(8):1288-1294 doi: 10.13433/j.cnki.1003-8728.20190270
Yuan Fangyang, Cui Zhengwei. Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System[J]. Mechanical Science and Technology for Aerospace Engineering. doi: 10.13433/j.cnki.1003-8728.20190270
Citation: Yuan Fangyang, Cui Zhengwei. Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System[J]. Mechanical Science and Technology for Aerospace Engineering. doi: 10.13433/j.cnki.1003-8728.20190270

纳米粉体连续高压分散装置的特性研究

doi: 10.13433/j.cnki.1003-8728.20190270
基金项目: 国家自然科学基金项目(11802105)与江苏省绿色过程装备重点实验室开放课题项目(GPE201705)资助
详细信息
    作者简介:

    袁方洋(1990−),讲师,博士,研究方向为流体机械与两相流体动力学,fyyuan@jiangnan.edu.cn

  • 中图分类号: TB303

Study on Characteristrics of Nanopowder Continuous High Pressure Dispersing System

  • 摘要: 搭建了一种超微颗粒连续分散装置,实验发现纳米颗粒经连续喷射分散可被分散至初级粒径范围。为探讨该装置的机理及高压分散特性,数值模拟了纳米粉体的二级喷射分散过程。结果表明,数值与实验结果的压力动态曲线相符,颗粒数密度沿流动方向降低,实验数据较模拟结果更低。颗粒高压分散的喷嘴不宜过长,以避免颗粒在喷嘴内流动过程中再次团聚,喷嘴长径比在2.5左右可在射流出口产生最大的剪切率,获得最佳的颗粒分散效果。
  • 图  1  纳米粉体连续喷射分散系统

    图  2  两级分散分别获得的颗粒粒径分布

    图  3  高压释放二级分散过程计算模型

    图  4  压力动态曲线

    图  5  同一时刻喷嘴附近各阶矩量的分布图

    图  6  二级分散数值结果与实验结果的比较

    图  7  颗粒中值粒径随喷嘴口径的变化

    表  1  二级分散前各计算域的无量纲初始矩值

    初始矩值高压腔体喷嘴收集气袋
    $m_{00}^*$11.0×10−61.0×10−6
    $m_{10}^*$11.0×10−61.0×10−6
    $m_{20}^*$22.10722.107×10−622.107×10−6
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-06-30
  • 网络出版日期:  2020-12-29

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