| 矩形通道中不同涡流发生器对换热和压降的影响 |
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| 引用本文： | 叶秋玲,周国兵,程金明,周少祥,程伟良.矩形通道中不同涡流发生器对换热和压降的影响[J].中国电机工程学报,2010(11). |
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| 作者姓名： | 叶秋玲 周国兵 程金明 周少祥 程伟良 |
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| 作者单位： | 华北电力大学能源动力与机械工程学院; |
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| 基金项目： | 高等学校博士学科点专项科研基金项目(20070079018); 北京市暖燃重点实验室开放课题(KF200708); 十一五国家科技支撑计划项目(2006BAA04B02)~~ |
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| 摘 要： | 对矩形通道内布置单排一对直角三角翼、矩形翼等以及研制的斜截半椭圆、半圆柱面涡流发生器的换热和压降特性进行了对比性实验。实验雷诺数Re在700～26800范围内,所有涡流发生器采用相同的高宽比、斜截倾角、迎流攻角和前沿间距。结果表明,斜截半椭圆柱面强化换热和压降综合性能最好。Re为700、4000和2×104时,最高局部换热系数分别约比平直流道增加了16.9%,9.3%,11.4%。斜截半椭圆柱面的阻力损失比矩形翼要小得多,Re为2×104时,约比矩形翼低37.9%。经分析,斜截半柱面涡流发生器能够产生端部涡和根部马蹄涡系,具有优越的强化换热效果,且由于其流线型柱面而压降较低。柱面相对柱体加工简单,制作方便。
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| 关 键 词： | 强化换热 涡流发生器 端部涡 马蹄涡系 压降 |
Influence of Different Vortex Generators on Heat Transfer Enhancement and Pressure Drop Characteristics in a Rectangular Channel |
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| YE Qiu-ling,ZHOU Guo-bing,CHENG Jin-ming,ZHOU Shao-xiang,CHENG Wei-liang.Influence of Different Vortex Generators on Heat Transfer Enhancement and Pressure Drop Characteristics in a Rectangular Channel[J].Proceedings of the CSEE,2010(11). |
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| Authors: | YE Qiu-ling ZHOU Guo-bing CHENG Jin-ming ZHOU Shao-xiang CHENG Wei-liang |
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| Affiliation: | YE Qiu-ling,ZHOU Guo-bing,CHENG Jin-ming,ZHOU Shao-xiang,CHENG Wei-liang(School of Energy Power , Mechanical Engineering,North China Electric Power University,Changping District,Beijing 102206,China) |
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| Abstract: | The performance of heat transfer enhancement and pressure drop characteristics of a pair of single-row vortex generators(VGs) in a rectangular channel were experimentally investigated.Different shapes of VGs such as delta winglets,rectangular winglets,and newly developed oblique-cut semi-elliptic cylinder shell,oblique-cut semi-circular cylinder shell were selected to carry out comparative experiments with Reynolds number(Re) ranged from 700 to 26800.The same aspect ratio,elevation angle,attack angle and sp... |
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| Keywords: | heat transfer enhancement vortex generator tip vortex horseshoe vortices pressure drop |
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