同济大学学报（自然科学版）
同濟大學學報（自然科學版）
동제대학학보（자연과학판）
JOURNAL OF TONGJI UNIVERSITY(NATURAL SCIENCE)
2009年
7期
969-973
,共5页
制冷换热器%翅片%数值模拟%强化传热
製冷換熱器%翅片%數值模擬%彊化傳熱
제랭환열기%시편%수치모의%강화전열
cooling heat exchanger%fin%numerical simulation%heat transfer enhancement
以矩形平翅片作为比较对象,采用数值模拟方法研究了空气外掠三对称大直径圆孔翅片表面的流动与传热性能,获得了不同Re(雷诺)数时矩形平翅片和三对称大直径圆孔翅片表面的速度场、温度场和Nu(努塞尔)数分布.平翅片的模拟结果与实验数据的最大误差小于10%,证明了该模拟方法的正确性.研究结果表明:当气流Re=1 610～6 440时,三对称大直径圆孔翅片的表面传热系数比平翅片提高25%以上.证明该圆孔翅片是一种适用于翅片管式制冷换热器且传热效果优越的片型.
以矩形平翅片作為比較對象,採用數值模擬方法研究瞭空氣外掠三對稱大直徑圓孔翅片錶麵的流動與傳熱性能,穫得瞭不同Re(雷諾)數時矩形平翅片和三對稱大直徑圓孔翅片錶麵的速度場、溫度場和Nu(努塞爾)數分佈.平翅片的模擬結果與實驗數據的最大誤差小于10%,證明瞭該模擬方法的正確性.研究結果錶明:噹氣流Re=1 610～6 440時,三對稱大直徑圓孔翅片的錶麵傳熱繫數比平翅片提高25%以上.證明該圓孔翅片是一種適用于翅片管式製冷換熱器且傳熱效果優越的片型.
이구형평시편작위비교대상,채용수치모의방법연구료공기외략삼대칭대직경원공시편표면적류동여전열성능,획득료불동Re(뢰낙)수시구형평시편화삼대칭대직경원공시편표면적속도장、온도장화Nu(노새이)수분포.평시편적모의결과여실험수거적최대오차소우10%,증명료해모의방법적정학성.연구결과표명:당기류Re=1 610～6 440시,삼대칭대직경원공시편적표면전열계수비평시편제고25%이상.증명해원공시편시일충괄용우시편관식제랭환열기차전열효과우월적편형.
The performance of the flowing and heat transfer with airflow over the three symmetrical big-holes fins tube are studied by the numerical simulation in comparison with the plane fines.The distributions of the velocity,temperature and Nu(Nuselt number) on the surfaces of the plane fins and the three symmetrical big-holes fins at different Re numbers are obtained.The maximal error between the modeling result and experiment bats of the plane fins is less than 10%,which verifies the simulation method.The simulation results prove that when the air flow Re number changes from 1 610 to 6 440,the surface heat transfer of the three symmetrical big-holes fin is higher by over 25 percent in comparison with the plane fin.This kind of fin is applicable to the fin-tube cooling heat exchanger and the effect of heat transfer is perfect.
