CAJ | 학술논문

基于CFD技术对不同流道结构的平板式纳滤膜分离器内的流动进行了数值模拟,以考察流道结构对膜分离性能的影响。分析了在平板膜器中加设螺旋形隔板和蛇形隔板后截面流体的次流状况。模拟结果表明在无绕流板流道中加设隔板后存在次流现象,螺旋形流道中流体流动存在二次流漩涡,蛇形流道拐角附近的流体也存在较强的二次流动,对减轻膜污染和浓差极化均有作用。
기우CFD기술대불동류도결구적평판식납려막분리기내적류동진행료수치모의,이고찰류도결구대막분리성능적영향。분석료재평판막기중가설라선형격판화사형격판후절면류체적차류상황。모의결과표명재무요류판류도중가설격판후존재차류현상,라선형류도중류체류동존재이차류선와,사형류도괴각부근적류체야존재교강적이차류동,대감경막오염화농차겁화균유작용。
In order to study the influence of flow passage structure on membrane separation performance,the flows in flat nanofiltration membrane separators with various flow passage structures were analyzed by numerical simulation based on CFD technology.The secondary flows of the spiral flow passage and serpentine flow passage were analyzed.It was indicated by the results that there were secondary flows when adding proper kind of flow passages in a flat membrane separator;vortexes appeared at spiral flow passage and a strong secondary flow existed near the corner of serpentine flow passage.,which were helpful for reducing membrane fouling and concentration polarization.