The investigations involved a large water droplet deposited on the heating surface, the temperature of which was higher than the Leidenfrost point. The main element of the experimental setup was the heating cylinder with K-type shielded thermocouple located in its centre just below the surface. The measuring system was located on highly sensitive scales. The analysis of the droplet behaviour in time was conducted based on measured droplet mass changes over time and also photographic data recorded with high resolution digital camera. The energy balance equation is given for the assumption that evaporation from the droplet upper surface is small compared with the amount of heat dissipated from the bottom surface. The formula for the heat transfer coefficient depends on two slope values and an orthogonal projection of the drop onto the heating surface. The slopes are estimated based on the droplet diameter linear time dependence and mass versus the contact zone relationship. The solution provides a good representation of droplet evaporation under Leidenfrost conditions. The investigations, reported in the study, which concern water droplet at atmospheric pressure deposited on a hot surface with the temperature higher than the Leidenfrost point, indicate the following regularities: droplet orthogonal projection onto the heating surface changes linearly with the droplet mass, evaporation of the same amount of mass decreases linearly with an increase in the heating surface temperature, slope of the graph showing mass loss versus the heating surface temperature successively decreases.

研究涉及一个较大的水滴沉积在加热表面，其温度高于莱顿弗罗斯特的温度。实验装置的主要元件是加热缸，其K型屏蔽热电偶位于其表面正下方的中心。测量系统位于高度敏感的标尺上。基于测量到的液滴质量随时间的变化以及使用高分辨率数码相机记录的照片数据对液滴行为进行及时分析。给出能量平衡方程的假设是，与从底表面消散的热量相比，从液滴上表面的蒸发很小。传热系数的公式取决于两个斜率值以及液滴在加热表面上的正交投影。基于液滴直径线性时间依赖性以及质量对接触区的关系来估计斜率。该解决方案很好地表示了莱顿弗罗斯特条件下的液滴蒸发。研究报告指出，与大气压下的水滴沉积在温度高于莱顿弗罗斯特点的热表面上有关的研究表明以下规律：水滴正交投影到加热表面上随水滴质量线性变化，蒸发相同质量的量随着加热表面温度的升高呈线性下降，