圆管内三角翼涡流发生器CaCO3污垢特性  

CaCO3 FOULING CHARACTERISTICS OF DELTA WING VORTEX GENERATOR IN TUBE

作　　者：徐志明[1] 赵宇 贺姗姗 韩志敏[1] Xu Zhiming;Zhao Yu;He Shanshan;Han Zhimin(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学能源与动力工程学院

出　　处：《太阳能学报》2019年第12期3417-3425,共9页Acta Energiae Solaris Sinica

基　　金：国家科学自然基金（51476025）

摘　　要：采用CFD软件模拟研究管内三角翼涡流发生器CaCO3污垢特性,考察涡流发生器排列间距、攻角、翼长及夹角对污垢热阻的影响。结果表明,在涡流发生器翼片两侧产生2个对称的运动方向相反的涡旋,且装有涡流发生器的强化管的污垢热阻小于光管的污垢热阻,说明涡流发生器对壁面边界层的扰动可有效抑制污垢的沉积。渐近污垢热阻随间距的增加而增大,且增速逐渐变缓;渐近污垢热阻在攻角小于90°时,随攻角的增加而增大,在攻角大于90°时,随攻角的增加而减小;渐近污垢热阻随翼长的增加而减小,且减小的速度逐渐增大;渐进污垢热阻随夹角的增加而减小,且减小趋势逐渐变缓。This paper simulates the CaCO3 fouling characteristics in pipes of delta wing vortex generator using CFD software and investigates the influence of arrangement spacing,angle of attack,wing length and included angle on vortex generator.The result show that there are two symmetrical opposing vortices on both sides of the wing of the vortex generator and the fouling resistance of the enhanced tube is less than that of the smooth tube,which explains that the disturbance of vortex generator on the wall boundary layer can effectively control the deposition of fouling.The asymptotic fouling resistance increases with the increase of the arrangement spacing,the growth rate slows down gradually;the asymptotic fouling resistance increases with the increase of the attack angle when the attack angle is less than 90 degrees and decreases with the increase of the angle of attack when the attack angle is more than 90 degrees;the asymptotic fouling resistance decreases with the increase of wing length,in which reduction rate increases gradually;the asymptotic fouling resistance decreases with the increase of the included angle,the reduction rate slows down gradually.

关 键 词：涡流发生器 CaCO3析晶污垢 沉积物 实验验证 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]