Heat transfer augmentation for the flow of a viscous liquid in circular tubes using twisted tape inserts

被引：139

作者：

Agarwal, SK ^{[1
]}

Rao, MR ^{[1
]}

机构：

[1] INDIAN INST TECHNOL,DEPT CHEM ENGN,BOMBAY 400076,MAHARASHTRA,INDIA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1996年 / 39卷 / 17期

关键词：

D O I：

10.1016/0017-9310(96)00039-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Isothermal and nonisothermal friction factors and mean Nusselt numbers for uniform wall temperature (UWT) heating and cooling of Servotherm oil (Pr = 195-375) were experimentally determined for their flow in a circular tube (Re-a = 70-4000) with twisted tape inserts (y = 2.41-4.84). Isothermal friction factors were found to be 3.13-9.71 times the plain tube values. The Nusselt numbers were found to be 2.28-5.35 and 1.21-3.70 limes the plain tube forced convection values based on constant flow rate and constant pumping power, respectively, for the minimum twist ratio tape. Correlations were developed for the prediction of isothermal friction factors and the Nusselt numbers. A correlation representing the effect of heat transfer on Friction Factors is also proposed. Copyright (C) 1996 Elsevier Science Ltd.

引用

页码：3547 / 3557

页数：11

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