Mathematical Description of Experimentally Determined Charge Distributions of a Unipolar Diffusion Charger
Mathematical Description of Experimentally Determined Charge Distributions of a Unipolar Diffusion Charger
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实验确定的单极扩散充电器电荷分布的数学描述
DOI：
10.1080/02786826.2012.659360
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发表时间：
2011
影响因子：
5.2
通讯作者：
C. Asbach
中科院分区：
文献类型：
--
作者：
H. Kaminski;T. Kuhlbusch;H. Fissan;L. Ravi;H. Horn;Hee;R. Caldow;C. Asbach
使用设置在约20-400 nm尺寸范围内的串联差分迁移率分析仪（DMA）测量改进的逆流单极扩散充电器的电荷分布。该充电器预期用于便携式气溶胶粒度分析仪，以测量粒度分布。所测定的电荷分布用对数正态分布表示，并建立了一组计算电荷分布的方程和系数。这些方程可以很容易地在软件中实现，用于尺寸分布测量。数学推导和测量的电荷分布之间的协议是非常好的，与回归系数R2> 0.96。研究表明，大约55%的20纳米粒子保持不带电，而多达25个基本电荷需要考虑400纳米粒子的多电荷校正。与Fuchs理论的比较提供了令人满意的协议与测得的平均电荷水平，但电荷分布不能描述的Fuchs理论，可能是由充电器的几何形状。版权所有2012美国气溶胶研究协会
The charge distributions of an improved opposed flow unipolar diffusion charger were measured using a tandem differential mobility analyzer (DMA) set up in a size range of approximately 20–400 nm. The charger is intended to be used in a portable aerosol sizer to measure particle size distributions. The determined charge distributions were represented by lognormal distributions, and a set of equations and coefficients was developed to calculate the charge distributions. These equations can be easily implemented in software for size distribution measurements. The agreement between the mathematically derived and measured charge distributions is very good, with regression coefficients R 2 > 0.96. The investigations showed that approximately 55% of 20-nm particles remain uncharged, while up to 25 elementary charges need to be considered for multiple charge correction of 400-nm particles. Comparison with the Fuchs theory delivered satisfying agreement with the measured average charge levels, but charge distributions cannot be described by the Fuchs theory, likely caused by the charger geometry. Copyright 2012 American Association for Aerosol Research
影响因子：
11.4
作者：
Cena, Lorenzo G.;Anthony, T. Renee;Peters, Thomas M.
通讯作者：
Peters, Thomas M.