流致振动条件下中空纤维膜的传热传质特性  

Heat and Mass Transfer Characteristics of Hollow Fiber Membrane Under Flow-induced Vibration

作　　者：李振兴 陈播 梁才航[1] LI Zhenxing;CHEN Bo;LIANG Caihang(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin541004,China)

机构地区：[1]桂林电子科技大学机电工程学院,桂林541004

出　　处：《工程热物理学报》2023年第9期2496-2503,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51566002);广西自然科学基金资助项目(No.2018GXNSFAA281347);广西制造系统与先进技术重点实验室基金资助项目(No.19050-44-001Z)

摘　　要：中空纤维膜除湿技术避免了气液夹带对室内环境的污染,在近年来受到越来越多的关注。中空纤维膜在液体重力和气流冲刷的共同作用下容易发生弯曲和变形,膜管的振动和变形对流体流动以及传热传质均会产生影响,但是目前对流致振动状态下中空纤维膜管的传热传质特性研究尚不多见。本文运用任意拉格朗日–欧拉法建立了流体诱导纤维膜振动的双向流固耦合模型,研究了脉动流体振幅和频率对中空纤维膜传热传质性能的影响。结果表明:当增大脉动风速振幅时,膜的迎流方向振幅高于垂直流动方向,与非流致振动状态相比,传热和传质强化因子最高可达到81.4%和86.7%;在脉动平均流速为1.5 m·s^(-1),频率为10~40 Hz时,流致振动可使传热和传质强化因子最高达到68.9%和96.2%。Hollow fiber membrane dehumidification technology has been paid more and more attention in recent years,because it avoids the indoor environment pollution caused by gas-liquid entrainment.The hollow fiber membrane is prone to bend and deform under the combined action of liquid gravity and airflow erosion.The vibration and shape change of the membrane tube have effects on fuid fow and heat and mass transfer,but there are few studies on heat and mass transfer of the hollow fiber membrane tube under fow-induced vibration at present.In this study,an arbitrary Lagrange-Euler method is used to establish a two-way fluid-solid coupling heat and mass transfer model of flow-induced vibration,and the effects of the amplitude and frequency of pulsating fow on the heat and mass transfer performance of the hollow fiber membrane are studied.The results show that:When the amplitude of pulsating flow is increased,the vibration amplitude of the membrane in the upstream direction is higher than that in the vertical direction.Compared with the non-fow induced vibration state,the enhancement factors of heat and mass transfer can reach 81.4%and 86.7%.When the mean velocity of the pulsating fow is 1.5 m·s^(-1) and the pulsating frequency is 10~40 Hz,the flow-induced vibration can make the enhancement factors of heat and mass transfer up to 68.9%and 96.2%.

关 键 词：中空纤维膜 流致振动 双向流固耦合 

分 类 号：TK172[动力工程及工程热物理—热能工程]