Similarity Analysis of Droplet Evaporation Trajectory in High Temperature Gas Flow
Similarity Analysis of Droplet Evaporation Trajectory in High Temperature Gas Flow
复制标题
高温气流中液滴蒸发轨迹的相似性分析
DOI：
10.1080/01457632.2022.2164681
复制
发表时间：
2023
影响因子：
2.3
通讯作者：
Quanzhong Xia
中科院分区：
文献类型：
--
作者：
Haibin Zhang;Bo Guan;Bofeng Bai;Feng Wu;Quanzhong Xia
基于数值计算，对高温空气横流中液滴蒸发轨迹进行了相似性分析。用于模拟水滴蒸发的过程涉及使用低沸点液滴。在695-1194 K的温度范围内研究了水和丙酮液滴的运动轨迹，讨论了两种不同液滴的相应参数之间的关系以及尺度效应。结果确定了不同种类的液滴的比较轨迹的存在，以及管理的轨迹的主要无量纲数，通过确定的雷诺数，斯托克斯数和努塞尔数。对于每个给定的气流雷诺数，液滴蒸发轨迹与气流温度具有唯一的对应关系。在此基础上，提出了确定液滴和横流模型参数的计算方法。考察了单液滴相似模拟方法对喷雾液滴的适用性，得到了高温横流中喷雾的结构。
In this study, a similarity analysis of droplet evaporation trajectory in high-temperature air crossflow based on numerical calculations was conducted. The procedure used for modeling the evaporation of a water droplet involved the use of a low boiling point liquid droplet. The trajectories of water and acetone droplets over an extensive temperature range of 695–1194 K were investigated, and the relationships for the corresponding parameters of the two different droplets, as well as the scale effect, were discussed. The results identify the existence of a comparative trajectory for different kinds of droplets, as well as the main dimensionless numbers governing the trajectory, by determining the Reynolds, Stokes, and Nusselt numbers. For each given gas flow Reynolds number, the droplet evaporation trajectory has a unique correspondence with the airflow temperature. Given this, a method of calculation to determine the modeling parameters of the droplet and crossflow was proposed. The applicability of the similarity modeling method of a single droplet to the spray droplets was examined, from which the spray structure in high-temperature crossflow was obtained.