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基于近场散射的颗粒粒径分布测量

谭浩 许传龙 张彪 王式民

谭浩, 许传龙, 张彪, 等 . 基于近场散射的颗粒粒径分布测量[J]. 北京航空航天大学学报, 2017, 43(2): 381-387. doi: 10.13700/j.bh.1001-5965.2016.0110
引用本文: 谭浩, 许传龙, 张彪, 等 . 基于近场散射的颗粒粒径分布测量[J]. 北京航空航天大学学报, 2017, 43(2): 381-387. doi: 10.13700/j.bh.1001-5965.2016.0110
TAN Hao, XU Chuanlong, ZHANG Biao, et al. Particle size distribution measurement based on near field scattering[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(2): 381-387. doi: 10.13700/j.bh.1001-5965.2016.0110(in Chinese)
Citation: TAN Hao, XU Chuanlong, ZHANG Biao, et al. Particle size distribution measurement based on near field scattering[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(2): 381-387. doi: 10.13700/j.bh.1001-5965.2016.0110(in Chinese)

基于近场散射的颗粒粒径分布测量

doi: 10.13700/j.bh.1001-5965.2016.0110
基金项目: 

国家自然科学基金 51376049

江苏省杰出青年基金 BK20150023

详细信息
    作者简介:

    谭浩, 男, 硕士研究生。主要研究方向:多相流测试、近场散射

    许传龙, 男, 博士, 教授, 博士生导师。主要研究方向:多相流测试、燃烧诊断

    张彪, 男, 博士, 讲师。主要研究方向:热辐射传输计算及测量、多相流测试

    王式民, 男, 学士, 教授, 博士生导师。主要研究方向:多相流测试、光散射

    通讯作者:

    许传龙, E-mail: chuanlongxu@seu.edu.cn

  • 中图分类号: O436.2

Particle size distribution measurement based on near field scattering

Funds: 

National Natural Science Foundation of China 51376049

Excellent Youth Foundation of Jiangsu Scientific Committee BK20150023

More Information
  • 摘要:

    针对传统的前向小角散射粒径测量系统中心光过强、杂散光干扰、散射角过小等缺点,本文采用一种新型的近场散射(NFS)方法测量前向小角散射光,研究并搭建了基于近场散射的颗粒粒径测量系统,将最大散射角提高到40.5°;在无需空白测量的情况下采用差分方法对透射光和散射光干涉成的散斑图像进行处理,有效去除中心光和杂散光的影响;对差分散斑图像进行快速傅里叶变换(FFT)频谱处理得到散射光强分布,利用Chahine算法对颗粒粒径进行了反演。最后,利用已知粒径(39.2 μm和67.3 μm)的标准颗粒对测量系统的准确性进行了单峰分布的验证,测量误差在5%之内;对于粒径为39.2 μm和67.3 μm的混合颗粒进行了双峰分布验证,在43.3 μm和74.1 μm处出现峰值,测量误差在10%左右。

     

  • 图 1  近场散射原理图

    Figure 1.  Schematic diagram of NFS

    图 2  近场散射矢量图

    Figure 2.  Schematic diagram of vectors in NFS

    图 3  近场散射粒径测量系统实验装置图

    Figure 3.  Experimental setup of NFS particle sizing measurement system

    图 4  近场散射测量图像

    Figure 4.  Measurement images in NFS

    图 5  39.2μm乳胶球的散射光强分布

    Figure 5.  Scattered intensity distribution of 39.2 μm latex spheres

    图 6  39.2μm乳胶球的粒径概率分布

    Figure 6.  Particle size probability distribution of 39.2 μm latex spheres

    图 7  39.2 μm和67.3 μm乳胶球测量结果

    Figure 7.  Measurement results of 39.2 μm and 67.3 μm latex spheres

    图 8  混合乳胶球的散射光强分布

    Figure 8.  Scattered intensity distribution of mixture latex spheres

    图 9  混合乳胶球的粒径概率分布

    Figure 9.  Particle size probability distribution of mixture latex spheres

    表  1  2种标准聚苯乙烯乳胶球

    Table  1.   Two certified polystyrene latex spheres

    编号 直径/μm
    GBW (E)120028 39.2±0.6
    GBW (E)120047 67.3±3.8
    下载: 导出CSV

    表  2  标准聚苯乙烯乳胶球测量值对比

    Table  2.   Comparison between the measurements of certified polystyrene latex spheres

    标定直径/μm 测量直径/μm 误差/%
    39.2±0.6 40.3±1.9 3.8
    67.3±3.8 68.7±2.4 4.0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-01-28
  • 录用日期:  2016-04-29
  • 刊出日期:  2017-02-20

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