管内周期性自旋流的强化传热实验  

Experimental investigation on heat transfer enhancement of periodic free swirl in tube

作　　者：王杨君[1] 邓先和[2] 李志武[2] 

机构地区：[1]上海大学嘉定校区化工系,上海201800 [2]华南理工大学教育部传热强化与过程节能重点实验室,广东广州510640

出　　处：《石油化工设备》2006年第4期1-5,共5页Petro-Chemical Equipment

基　　金：国家重点基础研究发展规划项目(G2000026301);上海市科委重点项目(052112032)

摘　　要：对间隔插入旋流片管内周期性自旋流的传热与流阻性能进行了实验研究,并比较了4种类型的旋流片及其不同旋流片间距的强化传热性能。结果表明,最佳旋流片间距Lp均在33d左右,旋流片强化传热的综合效果从大到小依次为:旋转角α=180°及旋流角β=20.3°的旋流片、旋转角α=270°及旋流角β=20.3°的旋流片、旋转角α=180°及旋流角β=38.1°的旋流片、旋转角α=270°及旋流角β=38.1°的旋流片。The characteristics of heat transfer and flow resistance of free swirl flow caused by twisted-leafs discontinuously in circular tube are experimented, and the heat transfer enhancement of four types twisted-leafs in different twisted-leaf pitch Lp is analyzed. The results indicate that the optimum twisted-leaf pitch Lp is around 33d（d means the width of twisted-leaf）and the sequence of twisted-leafs is 180°-20.3°（it denotes a type of twisted-leaf with twist angle α=180° and swirl angle β=20.3°） , 270°-20.3°, 180°-38.1°and 270°-38. 1° according to the valuation factor from high to low.

关 键 词：换热管 自旋流 强化传热 旋流片 

分 类 号：TQ051.5[化学工程] TE965[石油与天然气工程—石油机械设备]