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.

实验研究了在没有外部界面剪切的情况下，在有和没有网格湍流的明渠水流中，质传递到湍流液体中的过程。通过对点源发射的示踪剂浓度信号进行条件处理，测量表面更新涡流出现的频率和表面更新涡流的尺度；通过二氧化碳吸收实验，估算了液体侧的传质系数。在有无湍流栅格的明渠流动中，传质系数与大规模更新涡流出现的频率显著相关。结果表明，在没有外部界面剪切作用的情况下，大尺度涡流控制了气液界面的传质过程。在此基础上，采用表面更新的概念对传质机理进行了建模。

项目成果

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。

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 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，