Diffuse background illumination (DBI) is applied to analyze a cold, nonevaporating spray from a twin-fluid atomizer at typical atmospheric conditions. The DBI technique presented in this work provides liquid probability across the whole field of the spray to quantify liquid dispersal in the radial and axial directions. The spatial resolution is varied in five incremental steps from 25 to 200 µm/px to determine that a finer spatial resolution not only provides a greater fidelity to distinguish phenomenological features of the atomization process but also offers distinct information regarding droplet sparseness quantified by the gap size between droplets. Results from the spatial resolution sweep are analyzed to obtain cumulative probability and histograms of gap sizes at specific pixel locations. The presented analysis offers alternate metrics to characterize twin-fluid atomized sprays for design validation and optimization of combustion performance.

中文翻译：

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漫射背景照明在双流体喷雾统计描述中的应用

应用漫射背景照明 (DBI) 来分析典型大气条件下双流体雾化器产生的冷、非蒸发喷雾。这项工作中提出的 DBI 技术提供了整个喷雾区域的液体概率，以量化径向和轴向的液体扩散。空间分辨率从 25 到 200 µm/px 分五个增量变化，以确定更精细的空间分辨率不仅提供更高的保真度来区分雾化过程的现象学特征，而且还提供有关通过间隙大小量化的液滴稀疏性的独特信息水滴之间。分析空间分辨率扫描的结果，以获得特定像素位置处间隙尺寸的累积概率和直方图。