Abstract Water-emulsified liquid fuels have been used occasionally in combustion systems to control flame temperature and NOx emission. Atomization characteristics are important for efficient combustion of emulsified fuels, and they are affected by the mechanical properties of the emulsion. The dynamic behavior of an emulsion droplet is affected by the micro-droplets dispersed within the emulsion, and the actual properties of the emulsion are of interest. Recently, a new dynamic method using a pulse laser was developed based on the Taylor’s analogy breakup model. In this study, surface tension, light absorbance, and viscosity were evaluated for two emulsified fuels (n-decane and n-hexadecane), and their results compared with those of n-dodecane from the previous study. Three independent ordinary methods and the dynamic method were employed to measure the emulsion properties. Actual light energy absorbance, more reliable surface tension, and effective viscosity of emulsion could be predicted through the dynamic method. Finally, a simple empirical equation was suggested for the prediction of the effective viscosity of emulsion. The applicability of the proposed dynamic method was verified conclusively, and the most effective properties of single emulsion droplets were determined.

中文翻译：

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单滴水乳化正癸烷、正十二烷和正十六烷的表面张力、吸光度和有效粘度

摘要 水乳化液体燃料偶尔用于燃烧系统中以控制火焰温度和 NOx 排放。雾化特性对于乳化燃料的有效燃烧很重要，并且它们受乳液机械性能的影响。乳液液滴的动态行为受分散在乳液中的微滴的影响，乳液的实际性质是令人感兴趣的。最近，基于泰勒的类比破裂模型开发了一种使用脉冲激光的新动态方法。在这项研究中，评估了两种乳化燃料（正癸烷和正十六烷）的表面张力、吸光度和粘度，并将它们的结果与之前研究中的正十二烷的结果进行了比较。采用三种独立的普通法和动态法测量乳液性能。通过动态方法可以预测实际的光能吸收率、更可靠的表面张力和乳液的有效粘度。最后，提出了一个简单的经验方程来预测乳液的有效粘度。最终验证了所提出的动态方法的适用性，并确定了单个乳液液滴的最有效特性。