The evaporation of droplet on a superheated surface is a very important and common phenomenon in industrial production, such as spray cooling and metallurgical treatment. In this paper, a two-dimensional numerical simulation based on Lattice Boltzmann Method has been adopted to analyze the evaporation behavior of liquid droplet on an over-heated surface. The effects of superheat degree (Ja number) and surface wettability on droplet evaporation are analyzed respectively. During the evaporation process, the evaporation pressure at the bottom of the droplet exhibits periodic oscillation corresponding to bouncing movement. The oscillation gradually decays in the case of low Ja numbers, but for high Ja numbers, the oscillation doesn't decay. Leidenfrost vapor layer is more likely to be generated on a hydrophobic surface. Meanwhile, the comprehensive influence of wettability and Ja number on droplet evaporation time was studied systematically. On hydrophilic surfaces, there is a critical Ja value, around which the evaporation time exhibits a U-type tendency. However, the evaporation time continues to decrease as Ja number increases on hydrophobic surfaces.

液滴在过热表面上的蒸发是工业生产中非常重要且常见的现象，例如喷雾冷却和冶金处理。本文采用基于格子Boltzmann方法的二维数值模拟来分析液滴在过热表面上的蒸发行为。分别分析了过热度（Ja值）和表面润湿性对液滴蒸发的影响。在蒸发过程中，液滴底部的蒸发压力表现出与弹跳运动相对应的周期性振荡。在低Ja数的情况下，振荡逐渐衰减，但是对于高Ja数数字，振荡不会衰减。莱顿弗罗斯特蒸气层更可能在疏水表面上产生。同时，系统研究了润湿性和Ja值对液滴蒸发时间的综合影响。在亲水性表面上，存在一个关键的Ja值，在该值附近，蒸发时间呈现出U型趋势。然而，随着疏水表面上Ja数的增加，蒸发时间继续减少。