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.

在这项研究中，通过实验和nnmerical模拟方法研究了通过孔口散入水体引起的空气诱导的流动流量的液压壳。在实验室中测得的时间平均速度和湍流的实验数据表明，除了孔口附近的区域和靠近自由表面的区域外，空气羽羽的基本特征与对称密度羽流或喷气机的基本特征相似。考虑到空气泡体积的变化以及速度曲线扩散的实验性进行的数值模拟分析可以代表作者和Kobus测量的流场。有关空气羽流的仿真模型也应用于进行场实验的储层。数值结果与观察结果之间的比较表明，仿真模型适用于储层中充气引起的流量的预测。储层中的富营养化过程与上述模拟模型结合使用，并且对水质的预测进行了预测。在富营养化模型中，浮游植物分为三种。数值结果表明，至少在此处提出的模拟模型可以重现水质，尽管需要对现场观察的进一步研究来验证计算结果。

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,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)。

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）。

岩佐義朗;松尾直規;木村去;雑賀正嗣: 昭和62年度土木学会関西支部年次学術講演会概要集. II-7-1-II-7-2 (1987)

Yoshiro Iwasa；Naoki Matsuo；Ryo Kimura；Masatsugu Saiga：日本土木工程师学会关西分会 1985 年学术讲座摘要集。II-7-1-II-7-2 (1987)