Numerical investigation on conjugated heat transfer of conduction in wall and mixed convection in horizontal square tube with molten salts - Details

Author：

Wang, C. (Wang, C..) | Wu, Y.-T. (Wu, Y.-T..) (Scholars：吴玉庭) | Chen, C. (Chen, C..) (Scholars：陈超) | Liu, B. (Liu, B..) (Scholars：刘博) | Ma, C.-F. (Ma, C.-F..)

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Scopus

Abstract：

A　numerical　simulation　is　presented　on　the　mixed　convective　heat　transfer　of　molten　salts　in　single-side　heated　horizontal　square　tube.　The　flow　and　heat　transfer　characteristics　of　molten　salt　with　bottom,　lateral　and　top　heating　positions　are　analyzed,　respectively.　The　results　show　that　under　non-uniform　heating　conditions,　the　velocity　profiles　shape　of　main　core　area　changes　with　the　increase　of　flow　distance　due　to　buoyancy　effects　and　the　core　area　is　closed　to　heated　sides.　For　different　heating　positions,　different　number　and　scales　of　secondary　vortex　flow　forms　in　each　cross　section　of　channel　which　strengthened　heat　transfer　ability　obviously.　Good　agreement　between　simulated　data　and　mixed　convective　correlation　is　reached.　Compared　with　numerical　simulation　results　which　do　not　consider　tube　heat　wall　conduction,　the　results　which　consider　tube　wall　heat　conduction　shows　a　more　uniform　mainstream　core　area　with　a　larger　Nux　and　the　rebound　position　of　Nux　appears　in　advance.

Keyword：

Conjugated heat transfer; Horizontal square tube; Mixed convection; Molten salt; Numerical simulation

Author Community：

[ 1 ] [Wang, C.]Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Wang, C.]Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Wu, Y.-T.]Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Wu, Y.-T.]Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Chen, C.]Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Chen, C.]Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [Liu, B.]Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 8 ] [Liu, B.]Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 9 ] [Ma, C.-F.]Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
[ 10 ] [Ma, C.-F.]Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China

Reprint Author's Address：

吴玉庭
[Wu, Y.-T.]Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of TechnologyChina

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Source ：

Proceedings of the 15th International Heat Transfer Conference, IHTC 2014

Year： 2014

Language： English

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