The Structured Laser Illumination Planar Imaging (SLIPI) technique received significant attention in recent years due to notable improvements in the measurement of droplet size and the visualization of internal structure in both dilute and dense sprays. However, despite the improvements, the technique remains limited to these microscopic characteristics of the spray, primarily due to the complexity of the optical setup and image acquisition process. In this article, the capabilities of the SLIPI application are exploited, specifically employing the 3p-SLIPI-LIF/Mie (SLSD), and combined application of 1p-SLIPI-LIF & PIV (1p-SLIPI-PIV) for mapping of both Sauter Mean Diameter (SMD) and mean droplet velocity in combination with detailed spray structure analysis. The measurements were carried out in hollow cone sprays operated at the range of injection pressures from 25 to 107 bar. The results obtained using the SLIPI techniques were compared with the Phase Doppler Anemometry (PDA) measurements showing good agreement for both the SMD and mean droplet velocity. The significant improvements in the important microscopic characteristics (droplet size & velocity) and visualization of the internal structure in a wider flow field of hollow cone sprays allowed detailed analysis and understanding of the dispersed phase flow owing to the suppression of diffused light resulting from the multiple scattering effects.

中文翻译：

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使用基于 SLIPI 的技术绘制空心锥形喷雾中的液滴尺寸、喷雾结构和液滴速度图


近年来，结构化激光照明平面成像（SLIPI）技术由于在稀喷雾和浓喷雾中液滴尺寸测量和内部结构可视化方面的显着改进而受到极大关注。然而，尽管有所改进，该技术仍然仅限于喷雾的这些微观特征，这主要是由于光学设置和图像采集过程的复杂性。在本文中，利用了 SLIPI 应用程序的功能，特别是采用 3p-SLIPI-LIF/Mie (SLSD)，以及 1p-SLIPI-LIF 和 PIV (1p-SLIPI-PIV) 的组合应用来映射 Sauter平均直径 (SMD) 和平均液滴速度与详细喷雾结构分析相结合。测量在空心锥形喷雾中进行，喷射压力范围为 25 至 107 bar。将使用 SLIPI 技术获得的结果与相位多普勒风速测量 (PDA) 测量结果进行比较，显示 SMD 和平均液滴速度具有良好的一致性。在空心锥形喷雾的更宽流场中，重要的微观特征（液滴尺寸和速度）和内部结构的可视化得到了显着改进，由于多重光产生的漫射光受到抑制，因此可以详细分析和理解分散相流。散射效应。