制冷与空调（四川）
製冷與空調（四川）
제랭여공조（사천）
REFRIGERATION & AIR-CONDITION
2014年
3期
265-269,280
,共6页
数值模拟%圆形翅片%速度分布%流场特性
數值模擬%圓形翅片%速度分佈%流場特性
수치모의%원형시편%속도분포%류장특성
Numerical simulation%annular fin%Velocity distribution%Flow field characteristics
采用数值计算方法研究12排大管圆形翅片表面空气侧流体的流动特性，获得不同雷诺数下圆形翅片的速度分布云图、温度分布云图和流线分布图，并将模拟的结果与实验和实验关联式分别进行验证。研究结果表明：翅片间距为9.6mm第一排管壁侧和翅片表面的传热系数分别是翅片间距为2.4mm的1.67和0.97倍；前面六排翅片表面和管壁表面的传热系数具有很强的波动，而在第六排后翅片表面和管壁表面的传热系数趋向于稳定。
採用數值計算方法研究12排大管圓形翅片錶麵空氣側流體的流動特性，穫得不同雷諾數下圓形翅片的速度分佈雲圖、溫度分佈雲圖和流線分佈圖，併將模擬的結果與實驗和實驗關聯式分彆進行驗證。研究結果錶明：翅片間距為9.6mm第一排管壁側和翅片錶麵的傳熱繫數分彆是翅片間距為2.4mm的1.67和0.97倍；前麵六排翅片錶麵和管壁錶麵的傳熱繫數具有很彊的波動，而在第六排後翅片錶麵和管壁錶麵的傳熱繫數趨嚮于穩定。
채용수치계산방법연구12배대관원형시편표면공기측류체적류동특성，획득불동뢰낙수하원형시편적속도분포운도、온도분포운도화류선분포도，병장모의적결과여실험화실험관련식분별진행험증。연구결과표명：시편간거위9.6mm제일배관벽측화시편표면적전열계수분별시시편간거위2.4mm적1.67화0.97배；전면륙배시편표면화관벽표면적전열계수구유흔강적파동，이재제륙배후시편표면화관벽표면적전열계수추향우은정。
The airside flow performance of circular finned-tube with twelve-row heat exchangers is numerical investigated in this study. The velocity field, temperature field and streamlines are obtained and the result of the simulation study is compared with the experimental result and the experimental correlation. The research findings show that the heat transfer coefficient of the fin surface and the tube surface of the first row with fin spacing of 9.6mm are 1.67 and 0.97 times with the fin spacing of 2.4mm. And the heat transfer coefficients of the single fin surface and tube surface before the sixth row are strongly fluctuating, and when the number of the in-depth bundles is greater than six, the heat transfer coefficients of single fin surface and tube surface are almost consistent with going deeper into the bundles.
