有限空间竖直壁面的结冰特性

Icing characteristics of vertical test object in limited space

基于工程项目的实际需求,探究了如何在竖直实验件表面获得不同类型、均匀、可重复的冰层。首先搭建了一套喷雾结冰实验台:选择合适的空气雾化喷嘴及供水、供气设备,并匹配能够提供足够冷量的中型尺寸冷库。选择相应量程范围的各类传感器,用于监测实验过程中的温度、压力等参数。然后,依托喷雾结冰实验台研究了喷嘴喷雾的结冰特性。通过调节喷嘴水、气管路入口压力改变喷嘴喷雾水流量与喷雾粒径,匹配不同的环境温度,在实验件表面得到了不同覆冰类型的冰层,并对相应的工况进行了实验可重复性验证。最后,对背景项目所需要的结冰效果进行了工况探索,为项目设计实施方案的选择提供支持。

Based on the practical needs of engineering projects,this paper explores how to obtain different types of uniform and repeatable ice layers on the surface of vertical test object.Firstly,a set of spray icing experiment platform is built,including suitable air atomization nozzle and water and gas supply equipment,the cold storage that can provide sufficient cooling capacity,and various kinds of sensors with corresponding range to monitor the temperature,pressure and other parameters during the experiment.Then,the icing characteristics of nozzle spray are studied based on the platform.By adjusting the water and the gas inlet pressure of the nozzle to change the spray water flow rate and the spray particle size,and matching different ambient temperature,different icing types are obtained on the surface of the test object,and the experimental repeatability is verified for the corresponding working conditions.Finally,the icing effect required by the project is explored to provide support for the selection of project design and implementation scheme.