论文标题
喷雾剂中的leidenfrost温度：底物和液体特性的作用
Leidenfrost temperature in sprays: role of the substrate and liquid properties
论文作者
论文摘要
在这项研究中，实验测量了非常热的底物的喷雾冷却过程中的leidenfrost温度。喷雾参数，即液滴直径和速度以及质量通量，非常准确地测量。令人惊讶的是，测得的Leidenfrost温度与任何喷雾冲击参数无关，但仅由液体和底物的材料确定。当相关液体中的惯性力与粘性应力相媲美时，薄膜沸腾的机理是通过形成快速散发蒸发前线的形成来解释的。这导致了Leidenfrost温度的理论预测，这与实验数据非常吻合。
In this study the Leidenfrost temperature during spray cooling of very hot substrates is experimentally measured. The spray parameters, i.e. the drop diameters and velocities and the mass flux, are very accurately measured. Astonishingly, the measured Leidenfrost temperature is independent of any of the spray impact parameters, but is determined exclusively by the materials of the liquid and the substrate. The mechanism of film boiling is explained by the formation of a fast propagating vaporizing front, when the inertial forces in the associated liquid flow are comparable with the viscous stresses. This leads to a theoretical prediction for the Leidenfrost temperature which agrees well with the experimental data.
