Heat Transfer Performance through a Flat Tube Using Rotary Helical Screw-tape Inserts

被引：10

作者：

Omara, M. A. ^{[1
]}

机构：

[1] Suez Univ, Fac Ind Educ, Dept Mech, Suez 41522, Egypt

来源：

EXPERIMENTAL HEAT TRANSFER | 2016年 / 29卷 / 05期

关键词：

heat transfer; flat tubes; rotary helical screw-tape inserts; SPIRALLY CORRUGATED TUBES; TRANSFER ENHANCEMENT; LAMINAR-FLOW; EXCHANGER; SWIRL; AUGMENTATION; COMBINATION;

D O I：

10.1080/08916152.2015.1086842

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Heat transfer characteristics and friction factor in the horizontal double pipes of a flat tube with full and varied spacer length helical screws at various rotational speeds are investigated for Reynolds numbers ranging from 580 to 1,582. The heat transfer and friction factor of the inserted tube are significantly increased compared to those of the plain tube. The Nusselt number, friction factors, and thermal enhancement efficiency were increased with decreasing spacer length at increasing rotational speed under the same operating conditions.

引用

页码：691 / 706

页数：16

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