首页 | 本学科首页   官方微博 | 高级检索  
     

基于PIV测量技术的变曝气量下气液两相流速度场研究
引用本文:杜向润,孙楠,王蒙.基于PIV测量技术的变曝气量下气液两相流速度场研究[J].水利学报,2015,46(11):1371-1377.
作者姓名:杜向润  孙楠  王蒙
作者单位:西安理工大学陕西省西北旱区生态水利工程国家重点实验室, 陕西西安 710048,山西省水利水电科学研究院, 山西太原 030002,西安理工大学陕西省西北旱区生态水利工程国家重点实验室, 陕西西安 710048
基金项目:国家自然科学基金项目(51076130)
摘    要:粒子图像测速技术(PIV)作为一种无扰的全流场速度测量手段,在多相流研究领域具有较高的学术意义和实用价值。本研究针对曝气过程中的复杂气液两相流动,使用高速摄影机获取气液两相流流场的高帧图像,再通过图像预处理手段及PIV测速算法得到气液两相流速度场信息,并对不同工况下气液两相流的流态流速规律进行了研究分析。本文提出的图像预处理方案,通过采用图像的运动目标分割、降噪与反相等手段进行图像预处理,可以有效地减少后续速度场计算中的信息量及误差。研究结果为工业生产过程中有效提高曝气效率提供了重要的参考依据。

关 键 词:粒子图像测速技术(PIV)  气液两相流  图像处理  速度场
收稿时间:5/5/2015 12:00:00 AM

Analysis of gas-liquid two-phase flow velocity field under varying aeration rate based on PIV measurement technique
DU Xiangrun,SUN Nan and WANG Meng.Analysis of gas-liquid two-phase flow velocity field under varying aeration rate based on PIV measurement technique[J].Journal of Hydraulic Engineering,2015,46(11):1371-1377.
Authors:DU Xiangrun  SUN Nan and WANG Meng
Affiliation:State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China,Shanxi Institute of Water Conservancy and Hydroelectric Power Research, Taiyuan 030002, China and State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China
Abstract:PIV measurement technique, as an undisturbed full-field velocity measurement method, has important academic significance and practical value. This study aims at elucidating the fundamental structure of gas-liquid two-phase flow in aeration process. In this study, high frame image of gas-liquid two phase flow field is acquired by high speed camera, the velocity distribution of the flow field is obtained by image pre-processing and PIV algorithm, and the rules of flow regime and velocity are analyzed in different conditions.The suggested series of preprocessing method, including moving object segmentation, image denoising and inverting, purposes on effectively reduce the amount of information and errors in the subsequent calculations. The research results will provide the important reference basis for efficiently enhancing aeration efficiency in the industrial applications.
Keywords:PIV  gas liquid two-phase flow  image processing  velocity distribution
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《水利学报》浏览原始摘要信息
点击此处可从《水利学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号