“绿色”液体激光介质的热流场特性研究

选取掺钕四氟化钆钠(Nd3+:NaGdF4)纳米晶分散到二甲基亚砜作为"绿色"液体介质,构建单侧抽运和液体横流系统,使用ANSYS软件对液体介质稳定热流场分布进行模拟分析。结果表明:当流道形状、流动状态、壁面相同时,液体流场分布基本相同,泵浦光的频率对流场分布影响很小;液体介质入口的流速会影响流线分布,流速越快,流线越密;泵浦区域中,介质沿着液体流动方向温度逐渐升高;在液体流向变化小的区域,可获得较为均匀的温度分布。

Thermal flow field characteristics of “green” liquid laser medium

Nd3+:NaGdF4 nanocrystals dispersed in dimethyl sulfoxide is taken as the green liquid laser medium. Constructing side-pump configuration and transverse liquid flow system, the stable thermal flow field distributions are analyzed by ANSYS software. The results show that when the shape of the flow channel, the flow regime, and the wall surface remain unchanged, the thermal flow field distributions of the liquid are basically the same, and the frequency of pump light has a little effect on streamline distribution; the velocity of the input liquid will affect the distribution of the streamlines, the higher the velocity of input liquid is, the greater the streamline density is. Following the flow direction, the temperature of the medium in the pump area gradually increases, and in the area with constant flow direction of liquid, the temperature distribution is relatively uniform.