Experimental Study on Heat Transfer in Ducts with Winglet Disturbances
Experimental Study on Heat Transfer in Ducts with Winglet Disturbances
复制标题
小翼扰动管道传热实验研究
DOI：
10.1080/01457630304086
复制
发表时间：
2003
影响因子：
2.3
通讯作者：
X. Yan
中科院分区：
文献类型：
--
作者：
Z. Yuan;W. Tao;X. Yan
对一种新型的带翼片的强化矩形通道的换热和阻力特性进行了实验研究。结果表明，在雷诺数为5 2 10 3 ~ 4.7 2 10 4的范围内，带小翼的强化通道的换热性能优于带横向扰动的强化通道，且具有上级的换热性能。在相同泵功率条件下的比较表明，小翼通道与光滑通道的努塞尔数比Nu/Nu o在1.7 ~ 3.5之间变化，而在有横向扰动的增强通道中，Nu/Nu o通常小于1.5。在相同质量流量条件下，小翼通道与光滑通道的Nu/Nu o值在2.7 ~ 6.0之间变化。
Heat transfer and friction characteristics for a new type of enhanced rectangular duct with winglets have been investigated experimentally. The results indicate that, in the range of Reynolds number from 5 2 10 3 to 4.7 2 10 4 , heat transfer performance of the enhanced duct with winglets is superior to the enhanced duct with transverse disturbances. Comparisons under the identical pumping power condition reveal that the Nusselt number ratio Nu/Nu o of the winglet duct to the smooth duct varies from 1.7 to 3.5, while this ratio is usually less than 1.5 for the enhanced ducts with transverse disturbances. For condition of same mass flow, the ratio Nu/Nu o of the winglet duct to the smooth duct varies between 2.7 and 6.0.