摘要
本文基于粒子图像测速(PIV)技术,在不同的曝气强度下对膜面附近的流体力学特性进行了实验研究,结果表明:在一定范围内增加曝气强度可以使得膜面液相速度增加,并应用Euler多相流模型和多孔介质模型耦合对实验结果进行验证。同时本文将气泡羽流的概念应用于SMBR内复杂气液两相流场的研究,并应用气泡羽流分区研究反应器轴向液相速度的变化趋势:液相速度在羽流形成区呈现出先明显增加,而后在羽流形成后区相对较稳定增加,到达表面流区液相速度有所降低,而且极不稳定.结果表明模拟结果与实验结论具有很好的吻合性。
Experimental study on the hydromechanics characteristic of the gas-liquid two-phase flow around membrane surface had been carried on based on PIV technology. Liquid flow field was measured and calculated around membrane surface at five different aeration intensity conditions. The results show that aeration intensity affect liquid phase flow field greatly, increasing aeration intensity in a certain range can make the liquid velocity increase. Euler coupled multiphase model and porous media model were applied to validate the result of the experiment. This paper applies the concept of bubble plume to research complex gas-liquid two phase flow field in SMBR, and application partitioning bubble plume research change trend of liquid velocity in reactor axial： liquid velocity in the plume area show significantly increased first, and then in the plume zone after the formation of a relatively stable increase, reach the surface area of liquid phase velocity decreases, and unstable. The results show that the simulation result was well agreed to the experimental results.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第3期485-489,共5页
Journal of Engineering Thermophysics
基金
内蒙古自治区自然科学基金项目(No.2013MS0728)
内蒙古自然科学基金(No.2011MS0802)
关键词
浸没式中空纤维膜
流体力学
粒子图像测速技术
气泡羽流
submerged hollow fiber membrane
hydromechanics characteristics
Particle Image Ve-locimetry（ PIV）
bubble plume
