摘要
在单相数字粒子图像测速度(PIV)技术的基础上,研究气液两相流动的PIV图像处理方法,采用数字掩模技术对不同相的流动信息进行标记、识别、提取与计算,编辑了相应的软件。运用改进后的PIV方法对臭氧接触反应器中气-液体两相流动进行了测试与分析。结果表明,臭氧接触反应器中液相轴向流速分布是决定反应器内水力特性的主导因素;进气流量直接影响反应器内液气两相的流速分布;随进气流量的提高,液气两相的轴向速度和横向速度均增大,同时反应器流动结构与流程分布会发生较大变化。
Based on the technique of single phase particle image velocimetry( PIV),the PIV used to test gas-liquid two-phase flow field was studied. The information in different flowing phases was firstly masked,identified,extracted and calculated by using digital masking techniques,and the corresponding software was designed. Then,the two-phase flow field measurement in an ozone exposure reactor was investigated with the improved PIV method. The results showed that the axial velocity distribution of liquid phase is the dominant factor which decided hydraulic characteristics in the reactor; intake air flow rate directly affected the velocity distributions of the two-phase in the reactor. The axial velocity and lateral velocity of the two phases both increased with increasing intake air flow rate,meanwhile,the flow structure and its distribution of the reactor changed greatly.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第6期2706-2710,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51208358
51178311)
关键词
数字粒子图像测速技术
臭氧接触反应器
数字掩模技术
气液两相流
digital particle image velocimetry
ozone exposure reactor
digital masking techniques
gasliquid two-phase flow
