Abstract

Experimental data have been presented on the evaporation rate of suspended droplets of both pure water and water containing ≈1.5 wt % surfactant, sodium dodecyl sulfate. Evaporation occurs in a convective flow of dry air, with its velocity and temperature being varied within ranges of U₀ = 1–5 m/s and T₀ = 20–80°C, respectively. The density of the mass flux from the surface of the surfactant-containing droplets is 2–3 times lower than that in the case of pure water. For droplets in a dry air flow, the change in their diameter can be described by a set of similarity criteria, and a generalized linear empirical dependence of the evaporation rate on thermodynamic parameters may be constructed for these droplets.

中文翻译：

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表面活性剂对悬浮水滴蒸发强度的影响

摘要

关于纯水和含≈1.5wt％表面活性剂十二烷基硫酸钠的水的悬浮液滴的蒸发速率已提供了实验数据。蒸发发生在干燥空气的对流中，其速度和温度分别在U ₀ = 1-5 m / s和T ₀ = 20-80°C的范围内变化。来自含表面活性剂的液滴表面的质量通量密度比纯水的质量通量密度低2-3倍。对于干燥空气流中的液滴，可以通过一组相似性标准来描述其直径的变化，并且可以为这些液滴构造蒸发速率对热力学参数的广义线性经验依赖性。