E221 Flow and Convection Heat Transfer Characteristic of Ice Slurries in a Curved Pipe

Liquid lead-bismuth eutectic (LBE) has been studied as a new type of coolant for an accelerator driven sub-critical system (ADS). And the gas-lift pump has been used to enhance the circulation capacity of coolant in ADS instead of mechanical pumps due to its simpler mechanical structure and higher security. The purpose of this experiment is to study the circulation capacity enhancement by gas-lift technique and the flow and heat transfer characteristic of liquid LBE in an annular channel. The experimental results show that: gas-injection can significantly increase liquid LBE mass flow rate, but the growth of liquid LBE mass flow rate will be reduced when gas flow rate reaches a value; The friction coefficient of liquid LBE in an annular channel decreases with the increase of Re and is larger than that calculated by Blasius formula at the same Re. For the convection heat transfer of liquid LBE in an annular channel, the heat conduction term is dominant, and Nusselt number increases with the increase of Peclet number. The experimental correlations of friction coefficient and convection heat transfer of liquid LBE in annular channel were fitted based on experimental data and compared with those from literature.

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Fluid flow and mixed convection heat transfer in a rotating curved pipe

International Journal of Thermal Sciences ◽

10.1016/s1290-0729(03)00088-7 ◽

2003 ◽

Vol 42 (11) ◽

pp. 1047-1059 ◽

Cited By ~ 24

Author(s):

Huajun Chen ◽

Benzhao Zhang

Keyword(s):

Heat Transfer ◽

Fluid Flow ◽

Mixed Convection ◽

Convection Heat Transfer ◽

Convection Heat ◽

Curved Pipe ◽

Rotating Curved Pipe ◽

Mixed Convection Heat Transfer

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Numerical Investigation of a Symmetrical Combustion Burner and External Convection Heat Transfer Characteristics

2010 14th International Heat Transfer Conference, Volume 3 ◽

10.1115/ihtc14-22046 ◽

2010 ◽

Author(s):

Xing Li ◽

Li Jia ◽

Hui Yang

Keyword(s):

Heat Transfer ◽

Water Flow ◽

Heat Transfer Characteristic ◽

Radiation Heat Transfer ◽

Convection Heat Transfer ◽

Transfer Characteristic ◽

External Heat ◽

Water Tank ◽

Heat Transfer Characteristics ◽

Radiation Heat

Combustion characteristic of natural gas (NG) in a symmetrical combustion chamber and external convection heat transfer characteristic of water flow has been investigated numerically. The burner using a combination of swirling premixed and jet diffusion flames to achieve high flame stability. The combined eddy dissipation model/finite rate chemistry (EDM/FRC) combustion models coupled with RNG k-ε turbulence model were applied to model turbulence combustion. The discrete transfer method (DTM) coupled with weighted sum of gray gas model (WSGGM) were applied to solve the radiation heat transfer. Accurate calculation results were obtained by coupling calculation of combustion in the combustion chamber and external water flow and heat transfer. The temperature fields, heat transfer characteristic in the combustor and water tank were obtained by numerical simulation. The effects of water inlet mass flow rate on combustion and external heat transfer characteristics were discussed. The results indicated that water flow has significant effect on external heat transfer. The temperature distribution is quite uniform in the water tank. Radiation heat transfer plays a dominant role of heat transfer in the combustor.

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The Research of the Exergy Transfer Characteristic in the Process of Steady Heat Conduction during Constant-Section Straight Ribs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.732-733.176 ◽

2013 ◽

Vol 732-733 ◽

pp. 176-181

Author(s):

Bo Wei ◽

Wei He ◽

Xiao Chao Fan

Keyword(s):

Heat Transfer ◽

Convection Heat Transfer ◽

Transfer Characteristic ◽

Convection Heat ◽

Temperature Parameter ◽

Length Direction ◽

Exergy Transfer ◽

Steady Heat Conduction ◽

Steady Heat ◽

Constant Section

The ribs have been used to raise the area of convection heat transfer and consume little material simultaneously. This article adopt the analyze method of exergy transfer, with the help of gained temperature distribution in the constant-section straight ribs, derived the equation of the exergy distribution and the coefficient of exergy transfer distribution, with pay more attention to the rules of the energy quality decaying during the process of heat transfer in ribs. The solving results have been acquired in the Aluminium ribs and steel ribs with the case of same geometric parameter and same temperature parameter. The results show that the temperature, exergy value and the coefficient of exergy transfer is descending along the length direction of ribs. The parameter of Aluminium ribs is greater than the steel ribs because of the different property.

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