Analysis of gas transfer mechanisms due to air bubble and turbulence at the air-water interface

空气-水界面处气泡和湍流引起的气体传递机制分析

• 批准号: 12305031
• 负责人: KAKUNO Shohachi
• 金额: $ 17.24万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12305031/
• 关键词: wave breaking; air bubble; gas transfer velocity; wind-wave; air-sea interface; PTV; high-speed camera; void probe; 乱流モデル; 振動格子乱流場; 超音波

A dual-tip void probe was developed as a extension of standard single void probe. The validity of dual-tip void probe was verified and applied to bubble characteristics induced by breaking wave in the mechanically generated wave in the flume. The amount of gas transfer flowing rate instead of traditional gas transfer velocity was proposed to estimate the gas transfer rate in the surf zone, quantitatively (Kakuno, Shigematsu and Hosoi). The characteristics of turbulence in bubbly flows were measured and analyzed in the experimental facility (Asai). The droplet collision into the water surface was measured using 1 million frame per second ultra-high speed camera. The instability of thin gas film between droplet and water surface shows clear Reynolds number and Weber number dependence (Etoh). The relationship between the surface renewal process and micro scale turbulence has been measured by Particle Image Velocimetry and Laser Induced Fluorescence in a lattice turbulence (Sugihara). The simultaneous visualizations of air and water velocities were conducted in the wind-wave flume. The organized motion of air and water flows were measured and the bursting motions of air flow into the water were observed visually (Takehara, Etoh, Shigematsu and Tsujimoto). The bubble diameter distribution and bubble source functions were measured using Phase-Doppler anemometry in the wind-wave flume. The coherent bubble diameter spectra were measured under the wind-wave breaking (Mori). The field observations of bubble distributions under the wind-wave breaking were investigated using ultra sonic sensor at the upper ocean (Yoshioka). The gas transfer model at the breaking wave interface was proposed as a summary of above results (Moog).

双尖端空隙探针是作为标准单空隙探针的延伸而开发的。验证了双尖端空隙探针的有效性，并将其应用于水槽中机械产生波中破碎波引起的气泡特性。提出用气体传输流量代替传统的气体传输速度来定量估计海浪区的气体传输速率（Kakuno、Shigematsu 和 Hosoi）。在实验装置（浅井）中测量并分析了气泡流中的湍流特性。使用每秒 100 万帧的超高速相机测量液滴碰撞到水面的情况。液滴和水面之间的薄气膜的不稳定性表现出明显的雷诺数和韦伯数依赖性（Etoh）。表面更新过程与微尺度湍流之间的关系已通过晶格湍流中的粒子图像测速和激光诱导荧光（Sugihara）进行了测量。在风波槽中对空气和水的速度进行同步可视化。测量空气和水流的有组织运动，并目视观察空气流进入水中的爆发运动（Takehara、Etoh、Shigematsu 和 Tsujimoto）。使用相位多普勒风波水槽中的风速测量仪测量了气泡直径分布和气泡源函数。在风波破碎（Mori）下测量了相干气泡直径光谱。利用超声波传感器在上层海洋（吉冈）对风浪破碎下的气泡分布进行了现场观测。破碎波界面处的气体传输模型是作为上述结果的总结而提出的（Moog）。

项目成果

竹原幸生,R.J.Adrian,江藤剛治: "KC法を用いた新しいsuper-resolution PIVの提案"水工学論文集. 第44巻. 431-436 (2000)

Yukio Takehara、R.J. Adrian、Goji Eto：“使用 KC 方法的新型超分辨率 PIV 的提议”《水利工程杂志》，第 44 卷，431-436（2000 年）

Kakuno S.et al.: "The effect of bubbles on air water oxygen transfer in the breaker zone"Gas Transfer at Water Surfaces/M.A. Donelan et al. eds.. 265-270 (2002)

Kakuno S.et al.：“气泡对断路器区域空气水氧传输的影响”水面气体传输/M.A.

杉原裕司, 津守博通: "気液界面における表面更新乱流の特性"水工学論文集. 第46巻. 529-534 (2002)

Yuji Sugihara、Hiromichi Tsumori：“气液界面表面更新湍流的特征”水利工程学报第 46 卷 529-534（2002 年）。

Experimental study of air bubble distributions induced by wind wave breaking

风浪破碎引起的气泡分布实验研究

• 发表时间: 2003
• 期刊: Second Asia Pacific Coasts 2003:APAC2003 (CD-ROM)
• 作者: Mori;N.
• 通讯作者: N.

Shape Error Measurement Using Ray-tracing and Fringe Scanning Method -Projection of Grating Displayed on a Liquid Crystal Panel-

使用光线追踪和条纹扫描方法测量形状误差 -液晶面板上显示的光栅投影 -

• 发表时间: 2002
• 期刊: Precision Engineering 26
• 作者: Takashi Nomura;Kazuhide Kamiya;Seiichi Okuda;Keishi Yamazaki;Hatsuzo Tashiro;Kazuo Yoshikawa
• 通讯作者: Kazuo Yoshikawa