权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

A study on interfacial area transport in gas-liquid two-phase flow in mini-channels

微通道内气液两相流界面面积输运研究

基本信息

批准号：
23561011
负责人：
SHEN Xiuzhong
金额：
$ 3.33万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2013
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23561011/
关键词：
ミニチャンネル内気液二相流気泡流の画像処理計測法界面積濃度ボイド率界面積濃度輸送方程式の開発気泡合一と分裂のモデル化フォーセンサープローブ国際研究者交流多センサープローブミニチャネル内気液二相流流体工学

项目摘要

In this study, an imaging processing technique and a four-sensor probe method for local measurements in 2- and 3-D two-phase flows respectively were developed and verified. Local measurements of two-phase flows in mini-channels (namely narrow rectangular channels) were performed and the local flow parameters such as void fraction, interfacial area concentration (IAC) and bubble diameter were obtained. Based on the database, existing two-phase frictional multiplier correlations, existing drift-flux distribution parameter and drift velocity correlations and existing IAC correlation were verified or modified. By considering the crushed bubble characteristics, an interfacial area transport equation (IATE) was derived for the narrow rectangular channels. Random collisions between bubbles and impacts of turbulent eddies with bubbles were modeled for bubble coalescence and breakup respectively. The new IATE with the sink and source terms was evaluated to be reliable by the present database.

在这项研究中，一个图像处理技术和四传感器探针的方法分别在2-D和3-D两相流的局部测量和验证。对微小通道（即窄矩形通道）内的两相流进行了局部测量，获得了局部流动参数，如空隙率、界面浓度和气泡直径。在此基础上，对已有的两相摩擦系数关联式、漂移通量分布参数和漂移速度关联式以及IAC关联式进行了验证和修正。考虑气泡破碎特性，推导了矩形窄缝通道的界面面积输运方程。气泡的随机碰撞和湍流涡与气泡的碰撞分别模拟了气泡的合并和破碎。新的IATE与汇和源的条款进行了评价，是可靠的，目前的数据库。