含气溶胶竖直壁面冷凝液演化特性
Evolution characteristics of condensate on the vertical wall containing aerosols deposition
孙庆洋 1谷海峰 1周艳民 1张智刚 1鄂鑫诺 1王效1
作者信息
- 1. 哈尔滨工程大学 核科学与技术学院,黑龙江 哈尔滨 150001
- 折叠
摘要
为了研究壁面气溶胶颗粒层对蒸汽冷凝液生成行为的影响,本文针对不可溶气溶胶沉积竖直壁面上的蒸汽冷凝过程开展研究.采用可视化的方法建立了蒸汽冷凝实验平台并开展实验,观察冷凝液的发展规律,给出了冷凝速率、颗粒沉积密度对冷凝液演化特性的影响.结果表明:竖直壁面凝液演化经历液滴生长、液滴滑落和水流发展等过程,稳态冷凝液分布包括水流、液滴和薄水膜 3 个区域.高冷凝速率或高颗粒沉积密度环境下,液滴生长时间更短、凝液演化速度更快,随着冷凝速率和沉积密度的增加,水流的数量及其所占面积份额均增加.本文研究结果可为气溶胶冲刷模型优化提供依据.
Abstract
In this study,we investigated the steam condensation process on a vertical wall of insoluble aerosol depo-sition to examine the influence of aerosol particle layer on the formation behavior of steam condensate.We conduc-ted a visual experimental study on a steam condensation platform to observe the evolution law of condensate,giving the effects of condensation rate and particle deposition density on the evolution characteristics of condensate.The results show that the evolution of condensate on the vertical wall undergoes droplet growth,droplet sliding,and the development of rivulets.The distribution of steady-state condensate includes three regions:rivulets,droplets,and thin water film.In an environment with a high condensation rate or particle deposition density,the droplet growth time is shorter,and the condensate evolution speed is faster.Furthermore,the number and coverage of rivulets in-crease as the condensation rate and deposition density increase.Moreover,this study provides a basis for optimizing the aerosol wash-down model.
关键词
气溶胶冲刷/可视化/液滴滑落/凝液演化/水流面积份额/水流宽度/水流数量/蒸汽冷凝Key words
aerosol wash-down/visualization/droplet slipping/condensate evolution/rivulet coverage/rivulet width/number of rivulets/steam condensation引用本文复制引用
基金项目
黑龙江省核动力装置性能与设备重点实验室开放基金支持项目(HLJS202206)
出版年
2023
国家科技期刊平台
NSTL
维普
万方数据