A Study on Hydraulic Behaviors of Air-Bubble Plumes in Stratified Water Body

分层水体中气泡羽流的水力行为研究

• 批准号: 60460161
• 负责人: IWASA Yoshiaki.
• 金额: $ 4.54万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460161/
• 关键词: Air Bubble Plume; Aeration; Multi-Phase Flow; Numerical Analysis; Eutrophication Process; 水質予測; エアレーション; 数値シミュレーション; 噴流; 貯水池

In this study, hydraulic behabiors of the flow induced by the air dischrged into water body through an orifice are investigated by experimental and nnmerical simulation approaches. The experimental data of time-averaged velocity and turbulence measured in the laboratory show that the fundamental characteristics of the air-bubble plume is similar to the ones of symmetrical density plume or jet, except for the regions near the orifice and close to the free surface. The numerical simulation analysis considering the change of air-bubble volume together with the experimental intormation of the spread of velocity profiles can represent the flow field which have been measured by the authors and Kobus. The simulation model concerning the air-bubble plume is also applied to the reservoir where the field experiments were performed. Comparison between the numerical results and observed ones indicates that the simulation model is applicable to the prediction of flows induced by aeration in reservoirs.The eutrophication process in reservoirs is combined with the simulation model described above and the prediction for the water quality is performed. Phytoplankton is divided into three species in the eutrophication model. Numerical results indicate that the water quality can be reproduced using the simulation model proposed here, at least, qualitatively, though further investigations with field observations are required to verify the calculation results.

本文采用实验和数值模拟相结合的方法，研究了空气通过孔口进入水体时的水力特性。实验室测量的时均速度和湍流实验数据表明，气泡羽流的基本特征与对称密度羽流或射流的基本特征相似，但在孔口附近和接近自由面的区域除外。考虑气泡体积变化的数值模拟分析和速度剖面展宽的实验信息可以表示作者和Kobus测量的流场。并将建立的气泡羽流模拟模型应用于现场实验所在的油藏。数值模拟结果与实测值的对比表明，该模拟模型适用于水库曝气水流的预报。将水库富营养化过程与上述模拟模型相结合，对水库水质进行了预测。在富营养化模型中，浮游植物分为三种。数值结果表明，使用本文提出的模拟模型，至少可以定性地再现水质，但还需要进一步的现场观测来验证计算结果。

项目成果

Matsuo,N.: Proc.Sixth Congress of APD-IAHR. Vol.III. 169-176 (1988)

Matsuo,N.：APD-IAHR 第六次代表大会议程。

岩佐義朗;松尾直規;渡辺浩太郎;若林伸幸: 昭和63年度土木学会関西支部年次学術講演会概要集. (1988)

Yoshiro Iwasa；Naoki Matsuo；Kotaro Watanabe；Nobuyuki Wakabayashi：日本土木工程师学会关西分会 1988 年学术讲座摘要集。（1988）

松尾直規,岩佐義朗,南部茂義: 京都大学防災研究所年報. 29B-2. 579-593 (1986)

Naoki Matsuo、Yoshiro Iwasa、Shigeyoshi Nanb​​u：京都大学防灾研究所年度报告 29B-2（1986）。

松尾直規,岩佐義朗,渡辺浩太郎: 土木学会第41回年次学術講演会講演概要集. 第2部. 239-240 (1986)

Naoki Matsuo、Yoshiro Iwasa、Kotaro Watanabe：日本土木工程师学会第 41 届年度学术会议摘要第 2 部分。239-240 (1986)。

Iwasa,Y.: Proc. XXII Congress of IAHR. Topics C. 202-207 (1987)

岩佐，Y.：Proc。