Investigation of coated tubes in cross-flow boiling

被引：11

作者：

Lakhera, Vikas J. ^{[1
]}

Gupta, Akhilesh ^{[1
]}

Kumar, Ravi ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Mech & Ind Engn, Roorkee 247667, Uttaranchal, India

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2009年 / 52卷 / 3-4期

关键词：

Boiling heat transfer; Cross-flow; Surface roughness; Enhancement; HEAT-TRANSFER;

D O I：

10.1016/j.ijheatmasstransfer.2008.06.044

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The boiling in cross-flow is investigated for coated tubes (low-porosity, flame-sprayed) in this paper. The effect of surface roughness on flow boiling heat transfer for a horizontal tube surface in cross-flow is studied for saturated boiling of water at atmospheric pressure. The parameters varied were for flow velocity up to 3.24 kg/s (G = 258.49 kg/m(2) s), heat flux from 12 to 45 kW/m(2), surface roughness (Ra) from 0.3296 to 4.731 mu m. Nominal enhancement in heat transfer coefficient at higher mass flux may be attributed to the continued nucleation at the uppermost surfaces (in the wake region of the flow) of the rougher tubes thereby increasing the overall heat transfer rate. The flow boiling data was found to best fit the Kutate-n ladze asymptotic equation h = h(l)[1 + (h(npb)/hl)(n)](1/n) with the value of n = 2.258 (which is close to the value of n = 2 suggested by Kutateladze). (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：908 / 920

页数：13

共 20 条

[11] Experimental evaluation of constants for the Rohsenow pool boiling correlation [J].

Pioro, IL .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1999, 42 (11) :2003-2013

[12]

Rohsenow W.M., 1952, J. Heat Transfer, V74, P969

[13]

ROSENHOW WM, 1953, P HEAT TRANSFER FLUI, P123

[14]

SINGH RL, 1985, INT J HEAT MASS TRAN, V28, P515

[15]

THOME JR, 1989, HEAT TRANSFER ENG, V10, P37

[16]

VACHON RI, 1968, ASME, V90, P231

[17] NUCLEATE POOL BOILING DATA FOR 5 REFRIGERANTS ON PLAIN, INTEGRAL-FIN AND ENHANCED TUBE GEOMETRIES [J].

WEBB, RL ;

PAIS, C .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1992, 35 (08) :1893-1904

[18] EFFECT OF VELOCITY ON HEAT-TRANSFER TO BOILING FREON-113 [J].

YILMAZ, S ;

WESTWATER, JW .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1980, 102 (01) :26-31

[19]

ZUKAUSKAS A, 1989, HIGH PERFORMANCE SIN, P207

[20]

Zukauskas A., 1985, HEAT TRANSFER CYLIND

← 1 2 →