Developing turbulent mixed convection in a horizontal circular tube with strip-type inserts

被引：15

作者：

Hsieh, SS ^{[1
]}

Liu, MH ^{[1
]}

Wu, FY ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Mech Engn, Kaohsiung 80424, Taiwan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1998年 / 41卷 / 8-9期

关键词：

D O I：

10.1016/S0017-9310(97)00181-6

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental study was undertaken for developing turbulent mixed convection in a horizontal circular tube with strip-type inserts (longitudinal strip LS and crossed-strip CS inserts) for 6500 less than or equal to Re less than or equal to 19,500 and 5.82 x 10(4) less than or equal to Gr* less than or equal to 9.78 x 10(7). Temperature data were measured and heat transfer rates at different heat flux levels were calculated and correlated in the form of relevant parameters. The buoyancy effect was detailedly examined for 1.53 x 10(-4) less than or equal to Gr*/Re-2 less than or equal to 2.31. It is found that the buoyancy effect has less influence for tubes with inserts compared to the bare tubes. Moreover, the heat transfer enhancement was found 2-3 times than those of bare tubes. (C) 1997 Elsevier Science Ltd.

引用

页码：1049 / 1063

页数：15

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