ANALYSIS OF COMBINED NATURAL AND FORCED-CONVECTION IN VERTICAL SEMICIRCULAR DUCTS WITH RADIAL INTERNAL FINS

被引：7

作者：

DONG, ZF ^{[1
]}

EBADIAN, MA ^{[1
]}

机构：

[1] FLORIDA INT UNIV, DEPT MECH ENGN, MIAMI, FL 33199 USA

来源：

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 1995年 / 27卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1080/10407789508913706

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A numerical analysis of combined natural and forced convection is conducted for the fully developed laminar flow and heat transfer in a vertical semicircular duct with radial, internal longitudinal fins. Accurate solutions for heating upward flow are obtained by the finite difference method based on a fine grid, while the hydraulic and thermal conditions of the fills are ascertained. The results represent a range of Rayleigh numbers and various values of fin lengths and number of fins. The fully developed f Re and Nu values for pure forced convection in the finned semicircular duct are also documented. It is found that both the friction factor and the Nusselt number in the finned tube increase as the Rayleigh number increases. The effect of buoyancy is significant in semicircular ducts with short fins. By comparing the results of finless ducts with those of finned ducts, it was concluded that heat transfer in combined natural and forced convection in the semicircular duct is dramatically enhanced by using radial internal fins.

引用

页码：359 / 372

页数：14

共 50 条

[41] Forced-convection heat transfer in a combined radiation and convection furnace [J].

Nanri, Takayuki .

Heat Transfer - Japanese Research, 1992, 21 (04) :340-362

[42] COMBINED LAMINAR FREE AND FORCED-CONVECTION FROM A VERTICAL PLATE TO POWER LAW FLUIDS [J].

LIN, HT ;

SHIH, YP .

CHEMICAL ENGINEERING COMMUNICATIONS, 1980, 7 (06) :327-334

[43] COMBINED NATURAL AND FORCED-CONVECTION IN A LAMINAR WALL JET ALONG A VERTICAL PLATE WITH UNIFORM SURFACE HEAT-FLUX [J].

GORLA, RSR .

APPLIED SCIENTIFIC RESEARCH, 1976, 31 (06) :455-464

[44] COMBINED NATURAL AND FORCED CONVECTION HYDROMAGNETIC FLOW IN VERTICAL CHANNELS [J].

DAS, UN .

ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 1969, 49 (05) :257-&

[45] LES of combined forced and natural turbulent convection in a vertical slot [J].

Yin, J. ;

Bergstrom, D. J. .

COMPUTATIONAL FLUID DYNAMICS 2004, PROCEEDINGS, 2006, :567-+

[46] BUOYANCY EFFECTS ON FORCED-CONVECTION ALONG A VERTICAL CYLINDER [J].

CHEN, TS ;

MUCOGLU, A .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1975, 97 (02) :198-203

[47] NUMERICAL ANALYSIS OF LAMINAR NATURAL CONVECTION HEAT TRANSFER FROM A VERTICAL WALL WITH SEMICIRCULAR FINS FOR SUSTAINABLE THERMAL MANAGEMENT [J].

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Nanda, Jajneswar ;

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[48] LAMINAR FORCED-CONVECTION IN CIRCULAR AND FLAT DUCTS WITH WALL AXIAL CONDUCTION AND EXTERNAL CONVECTION [J].

WIJEYSUNDERA, NE .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1986, 29 (05) :797-807

[49] FORCED-CONVECTION IN CONVERGENT AND DIVERGENT DUCTS OF RECTANGULAR CROSS-SECTION [J].

SU, CC ;

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NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 1991, 20 (04) :445-458

[50] TRANSIENT CONJUGATED FORCED-CONVECTION IN DUCTS WITH PERIODICALLY VARYING INLET TEMPERATURE [J].

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1987, 30 (10) :2073-2082

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