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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Characterization of high-pressure water-mist sprays: Experimental analysis of droplet size and dispersion
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Characterization of high-pressure water-mist sprays: Experimental analysis of droplet size and dispersion

机译：高压水雾喷雾的表征：液滴尺寸和分散性的实验分析

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摘要

Popularity of water mist is increasing for a variety of applications within the broad areas of fire suppression and surface cooling. The present study has been focused on characterizing the solid-cone water-mist spray produced by a typical atomizer at high operative pressure (in the range 60-80. bar). To this end, an experimental campaign has been conducted, mainly employing optical techniques: drop-size and flux distribution, initial velocity and cone angle have been investigated to provide a quantitative description of atomization and dispersion. Most notably, a laser-diffraction-based instrument (Malvern Spraytec) has been used to evaluate drop size, while velocity field and spray-cone angle have been studied by Particle Image Velocimetry (PIV) technique. Appropriate measurement methodologies have been developed to the purpose. Moreover, a theoretical discussion based on inviscid-fluid assumption is presented and some relations have been evaluated as predictive of the considered parameters.
机译：水雾在灭火和表面冷却的广泛领域中的各种应用中的流行性正在增加。本研究的重点是表征典型雾化器在高工作压力（60-80巴范围内）下产生的实心圆锥形水雾喷雾。为此，已经进行了一项实验活动，主要采用光学技术：对液滴大小和通量分布，初始速度和锥角进行了研究，以定量描述雾化和分散。最值得注意的是，基于激光衍射的仪器（Malvern Spraytec）已用于评估墨滴大小，而速度场和喷雾锥角已通过粒子图像测速技术（PIV）进行了研究。为此目的已经开发了适当的测量方法。此外，提出了基于无粘性流体假设的理论讨论，并且已经评估了一些关系作为对所考虑参数的预测。

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