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요약정보
异型管管翅式换热器性能研究 / Study on Performance of Special-shaped Tube-fin Heat Exchanger
Resource Type
Academic Journal
Authors
徐荣吉
;
沃龙
;
王瑞祥
;
王随林
;
Xu Rongji
;
Wo Long
;
Wang Ruixiang
;
Wang Suilin
Source
制冷学报 / Journal of Refrigeration
. 43(1):81-90
Subject
换热器;综合性能;异型管;强化换热;空气扰动
Language
Chinese
ISSN
0253-4339
Online Access
Find it @ DONGA
초록
管翅式换热器的翅片优化为研究热点,而对管型的研究较少.本文提出一种与圆管相同水力半径的异型管的设计方法,建立了异型管管翅式换热器空气侧换热的数值计算模型,研究了管型、迎风方向和翅片间距对异型管管翅式换热器性能的影响.结果表明:对于双排的异型管换热器,第一排管大圆迎风,第二排管小圆迎风时,空气流动最均匀,压降最低,是综合性能最佳的迎风方向排布;在所研究的圆管、椭圆管、异型管和扁平管管翅式换热器中阻力特性和综合性能最好的是异型管i,在4 m/s风速下,异型管i的压降比圆管低31.86%,性能强化评价指标(Nu/Nu0)/(f/f0)值为1.456,主要由于管间空气的净流通面积大,流经换热器受到的扰动小;此外,翅片间距越大,管型对空气侧流动换热的影响越大,在大翅片间距下,管型对换热器阻力性能及综合性能的改善效果优于小翅片间距.
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