The influence of wire orientation during nucleate pool boiling in subcooled dodecane

被引：10

作者：

Pi, Xiaoyue ^{[1
]}

Rangwala, Ali S. ^{[1
]}

机构：

[1] Worcester Polytech Inst, Dept Fire Protect Engn, 100 Inst Rd, Worcester, MA 01609 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 137卷

关键词：

Nucleate pool boiling; Subcooled dodecane; Critical heat flux; Wire orientation; Bubble observations; ANGLE;

D O I：

10.1016/j.ijheatmasstransfer.2019.03.088

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experiments were performed to examine the influence of thin wire heater orientation (phi = 0 degrees (horizontal), 22 degrees, 33 degrees, 44 degrees, 49.5 degrees, 74 degrees and 90 degrees (vertical)) on nucleate boiling in subcooled dodecane. Variations of both heat flux (q '') and temperature difference (Delta T) along with phi change were analyzed. The number, velocity, and size of bubbles (whose size were larger than the wire diameter) were recorded, and their influence on critical heat flux (CHF) at different orientation angles were discussed. As phi increased, CHF variations decreased slowly at first and then quickly. The decrease in CHF was accompanied by decrease of bubble number and size, but increase of bubble speed along the wire. A critical angle of phi = 22 degrees shows the highest heat transfer coefficient (HTC). (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：1247 / 1257

页数：11

共 17 条

[1]

Bergman TL., 2011, Introduction to heat transfer, DOI DOI 10.1016/J.APPLTHERMALENG.2011.03.022

[2] Heater orientation effects on pool boiling of micro-porous-enhanced surfaces in saturated FC-72 [J].

Chang, JY ;

You, SM .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1996, 118 (04) :937-943

[3]

Christopher D M., 2006, Tsinghua Science and Technology, V11, P523, DOI [10.1016/S1007-0214(06)70229-2, DOI 10.1016/S1007-0214(06)70229-2]

[4] Effects of inclination angle and liquid subcooling on nucleate boiling on dimpled copper surfaces [J].

El-Genk, Mohamed S. ;

Suszko, Arthur .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 95 :650-661

[5] Nucleate boiling of two and three-component mixtures [J].

Fujita, Y ;

Tsutsui, M .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2004, 47 (21) :4637-4648

[6]

Kandlikar S.G., 1999, Handbook of Phase Change: Boiling and Condensation

[7] A theoretical model to predict pool boiling CHF incorporating effects of contact angle and orientation [J].

Kandlikar, SG .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2001, 123 (06) :1071-1079

[8]

Lee L., 1975, Letters in Heat and Mass Transfer, V2, P315, DOI 10.1016/0094-4548(75)90015-6

[9] Nucleate boiling modes of subcooled water on fine wires submerged in a pool [J].

Lu, JF ;

Peng, XF ;

Bourouga, B .

EXPERIMENTAL HEAT TRANSFER, 2006, 19 (02) :95-111

[10]

Nukiyama S., 1934, INT J HEAT MASS TRAN, V9, P1411

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