Page 107 - 《应用声学》2021年第1期

第 40 卷 第 1 期 Vol. 40, No. 1
2021 年 1 月 Journal of Applied Acoustics January, 2021

⋄ 研究报告 ⋄

声波作用下液滴碰并沉降及其氢氧同位素特征 ∗

柏文文 1 魏加华 1,2† 李 琼 1 时 洋 2 倪三川 1 雷发楷 2

(1 青海大学水利电力学院 三江源生态与高原农牧业国家重点实验室 西宁 810016)
(2 清华大学水沙科学与水利水电工程国家重点实验室 清华大学水利水电工程系 北京 100084)
摘要：液滴沉降过程中会与环境水汽发生物质交换。论文通过小尺度室内实验，研究了低频声波作用下液滴
碰并沉降及其与气室环境水汽氢氧同位素交换特征。研究结果证实液滴沉降过程中存在同位素交换，该过程
受声波显著影响。声波作用后液滴粒径增大，液滴沉降后汇集水中重同位素出现富集。液滴与环境水汽氢氧
同位素交换强度与液滴初始粒径呈正相关，声波对大液滴群影响的显著性水平可达 0.05。该研究可为室外声
波增雨雪试验效果评价提供理论参考依据。
关键词：液滴；声波；氢氧同位素；环境水汽；显著性水平
中图法分类号: TV11 文献标识码: A 文章编号: 1000-310X(2021)01-0103-10
DOI: 10.11684/j.issn.1000-310X.2021.01.013

The hydrogen and oxygen isotope characteristic of droplet collision and
deposition under the action of acoustic wave

BAI Wenwen 1 WEI Jiahua 1,2 LI Qiong 1 SHI Yang 2 NI Sanchuan 1 LEI Fakai 2

(1 School of Water Resources and Electric Power, State Key Laboratory of Plateau Ecology and Agriculture,
Qinghai University, Xining 810016, China)
(2 State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering,
Tsinghua University, Beijing 100084, China)

Abstract: There is material exchange between droplet and environmental water vapor in the process of droplet
deposition. In this study, it studied droplet characteristics of hydrogen and oxygen isotopes and isotopes
exchange with environmental water vapor in the process of droplet colliding and settling under the action of
low-frequency strong sound waves, through small-scale laboratory experiments. The results show that there is
isotope exchange in the process of droplet deposition，this process is significantly influenced by sound wave. The
droplet size increased, and the heavy isotopes in the accumulated water enriched under the action of acoustic
wave. In addition, the hydrogen and oxygen isotopes exchange intensity is positively correlated with the initial
droplet size, and the influence of sound wave of the large droplets group can reach 0.05. The results can provide
a theoretical basis for the evaluation of the effect of outdoor experiment.
Keywords: Droplet; Sound wave; Hydrogen and oxygen isotopes; Environmental water vapor; Significance level

2020-04-07 收稿; 2020-06-28 定稿
国家重点研发计划资助项目 (2017YFC0403600), 国家自然科学基金青年基金项目 (51909130), 青海省科技基础平台项目 (2017-ZJ-
∗
Y01), 青海省自然科学基金青年基金项目 (2019-ZJ-968Q), 青海大学中青年科研基金项目 (2018-QGY-8；2018-QGY-9), 清华大学水
沙科学与水利水电工程国家重点实验室开放基金项目 (sklhse-2019-B-03)
作者简介: 柏文文 (1989– ), 男, 甘肃天水人, 博士研究生, 讲师, 研究方向: 水文气象。
† 通信作者 E-mail: weijiahua@tsinghua.edu.cn