Heat Transfer Enhancement of Laminar Flow in a Circular Tube Using Swirl/Vortex Generator

被引：2

作者：

Salman, Sami D. ^{[1
,2
]}

Kadhum, Abdul Amir H. ^{[1
]}

Takriff, Mohd S. ^{[1
]}

Mohamad, Abu Bakar ^{[1
]}

机构：

[1] Univ Kebangsaan Malaysia, Fak Kejuruteraan & Alam Bina, Jabatan Kejuruteraan Kimia & Proses, Ukm Bangi 43600, Selangor De, Malaysia

[2] Univ Baghdad, Al Khawarizmi Kolej Kejuruteraan, Baghdad 47024, Iraq

来源：

JURNAL KEJURUTERAAN | 2014年 / 26卷

关键词：

Heat transfer augmentation; baffled twisted tape insert (BTT); FLUENT; CFD simulation;

D O I：

10.17576/jkukm-2014-26-09

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Swirl/vortexflow generator is an important form of passive augmentation techniques consist of a variety of tube inserts, geometrically variedflow arrangements and duct geometry modifications that producellows. Twisted-tape is one of the most important members of this form which used extensively in different type heat exchangers. This paper presents a research on heat transfer enhancement and friction factor characteristics in a circular tube using CFD simulation. Plain twisted tape inserts with twist ratios (y = 2.93, 3.91) and slant baffled twisted tape inserts with baffle angle 30 degrees and twist ratio (v = 2.93) have been used for the simulation. The results obtained by simulation matched with the literature correlations for plain tube with the discrepancy of less than +/- 8% for Nusselt number and +/- 6.25% for friction factor. The results have also revealed that the heat transfer in term of the Nusselt number enhanced with increases of Reynolds number, decreases of twist ratio. Among the various twist ratios, the slant baffled twisted tape with twist ratio of y = 2.93 has offered a maximum heat transfer enhancement with significant friction factor.

引用

页码：63 / 67

页数：5

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