Measuring droplet size distributions from overlapping interferometric particle images.
Measuring droplet size distributions from overlapping interferometric particle images.
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DOI：
10.1063/1.4909537
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
Humberto Bocanegra Evans;N. Dam;D. D. van der Voort-D.;G. Bertens;W. van de Water
中科院分区：
文献类型：
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作者：
Humberto Bocanegra Evans;N. Dam;D. D. van der Voort-D.;G. Bertens;W. van de Water
干涉颗粒成像提供了一种简单的方法来测量来自离焦图像的液滴尺寸的概率密度函数（PDF）。光学设置很简单，但当粒子图像重叠时，数据的解释是一个问题。我们提出了一种新的方法来分析图像。重点不是对液滴的精确识别，而是在重叠颗粒图像的情况下获得液滴尺寸的PDF的良好估计。该算法进行了测试，使用合成和实验数据。接下来，我们使用这些方法来测量旋转圆盘气溶胶发生器产生的液滴尺寸的PDF。平均主液滴直径同意从文献中的预测，但我们发现卫星液滴大小的分布很广。
Interferometric particle imaging provides a simple way to measure the probability density function (PDF) of droplet sizes from out-focus images. The optical setup is straightforward, but the interpretation of the data is a problem when particle images overlap. We propose a new way to analyze the images. The emphasis is not on a precise identification of droplets, but on obtaining a good estimate of the PDF of droplet sizes in the case of overlapping particle images. The algorithm is tested using synthetic and experimental data. We next use these methods to measure the PDF of droplet sizes produced by spinning disk aerosol generators. The mean primary droplet diameter agrees with predictions from the literature, but we find a broad distribution of satellite droplet sizes.