Study on Turbulence Structure of Surface-Renewal Motion by using a Laser-Fluorescence and modelling of Gas-Absorption Mechanism

利用激光荧光研究表面更新运动的湍流结构和气体吸收机制的建模

• 批准号: 63550712
• 负责人: KOMORI Satoru
• 金额: $ 1.41万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550712/
• 关键词: Turbulence Structure; Gas-Absorption; Gas-Liquid Interface; Surface-Renewal Eddy; Mass Transfer; 乱流

Mass transfer into a turbulent liquid across the gas-liquid interface in the absence of external interfacial shear was experimentally investigated in both open-channel water-flows with and without grid-generated turbulence. The frequency of the appearance of surface-renewal eddies and the scales of surface-renewal eddies were measured by conditionally processing the concentration signal of the tracer emitted from a point source; the mass-transfer coefficient on the liquid side was estimated through carbon-dioxide absorption experiments. The mass-transfer coefficient was significantly correlated with the frequency of the appearance of large-scale renewal eddies in both open-channel flows with and without turbulence grids. The results show that the large-scale eddies control the mass transfer across the gas-liquid interface into turbulent liquid flows in the absence of an external interfacial shear. Based on the results, mass transfer mechanism was modelled by using the surface-renewal concept.

在没有外部界面剪切的情况下，在具有和没有网格生成的湍流的两个开放通道水流中，在没有外部界面剪切的情况下，在没有外部界面剪切的情况下，质量转移到气体液界面上。表面更新涡流的出现频率和表面更新涡流的尺度是通过条件处理从点源发出的示踪剂的浓度信号来测量的；通过二氧化碳的吸收实验估算了液体侧面的质量转移系数。质量转移系数与带有和没有湍流网格的两个开放通道流中的大规模更新涡流的出现频率显着相关。结果表明，在没有外部界面剪切的情况下，大规模涡流将跨气体界面的大传递转移到湍流中。根据结果​​，通过使用表面续订概念对传质机制进行建模。

项目成果

小森悟: "大スケ-ル乱流渦と気液界面を通しての物質移動の関連性" ながれ別冊. 8巻別冊. 239-243

小森悟：“大规模湍流涡流与通过气液界面的传质之间的关系”Nagare单独卷第8卷239-243。

Satoru KOMORI: "The Relationship between Surface-Renewal Motions in an Open-Channel Flow" Journal of Fluid Mechanics. 203. 103-123 (1989)

Satoru KOMORI：“明渠流中表面更新运动之间的关系”流体力学杂志。

Satoru KOMORI: "The Generation of Surface-Renewal Eddies in an Open-Channel Flow" Transport Phenomena in Turbulent Flows(ed.by M.Hirata & Kasagi,Hemisphere Pub.). 1. 213-223 (1989)

小森悟：“明渠流中表面更新涡流的产生”湍流中的输运现象（M.Hirata 编）

Satoru KOMORI: "Mass Transfer into a Turbulent Liquid Across the Gas-Liquid Interface in the Absence of Interfacial Wind-Shear" Aiche Journal. 36. (1990)

Satoru KOMORI：“在没有界面风切变的情况下，通过气液界面向湍流液体进行传质”Aiche Journal。

Komori, S., Murakami, Y, & Ueda, H.: "The Relationship between Surface-Renewal Motions in an Open-Channel Flow" J. Fluid Mech.Vol.203. 103-123 (1989)

小森，S.，村上，Y，