Abstract

The paper present experimental results for temperature fields in heterogeneous droplets of liquids, freely falling in a preheated gaseous medium, before their micro-explosive fragmentation. The optical technique of Planar Laser Induced Fluorescence was applied. Unlike the known results of other authors, such fields were obtained for the first time without using holders for droplets, the latter heated in the temperature range of 900\(^{\circ}\)C to 1100\(^{\circ}\)C. The aim was to approach promising gas-vapor-droplet technologies. It is shown that for micro-explosive disintegration of a droplet containing a flammable component (by the example of Diesel and oils of two grades) and water, the necessary and sufficient condition is that the water reaches the boiling point. In this case, local superheating of the inter-component interface is sufficient. Motion intensifies the transformation of droplet and its subsequent destruction with appearance of polydisperse cloud.

中文翻译：

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微炸碎裂之前在预热介质中移动的两液液滴的温度场

摘要

本文介绍了非均匀液滴在微爆炸破裂之前自由下落在预热的气态介质中的温度场的实验结果。应用了平面激光诱导荧光的光学技术。不同于其他作者的已知的结果，获得了这样的字段首次不使用保持器为液滴，后者的温度范围内的900加热\（^ {\ CIRC} \）〜1100 \（^ {\ CIRC} \）C.目的是采用有前途的气体-蒸汽滴技术。结果表明，对于含有易燃成分（以两个等级的柴油和机油为例）和水的微滴爆炸，必要和充分的条件是水达到沸点。在这种情况下，部件间界面的局部过热就足够了。运动加剧了液滴的转化及其随后的破坏，并出现了多分散云。