Laminar forced convective heat transfer to near-critical water in a tube

被引：0
作者：
Sang-Ho Lee
机构：
[1] Wonkwang University,Division of Mechanical System and Design Engineering
来源：
KSME International Journal | 2003年 / 17卷
关键词：
Near-Critical Water; Convective Heat Transfer; Pseudocritical Point; Thermo-Physical Properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Numerical modeling is carried out to investigate forced convective heat transfer to nearcritical water in developing laminar flow through a circular tube. Due to large variations of thermo-physical properties such as density, specific heat, viscosity, and thermal conductivity near thermodynamic critical point, heat transfer characteristics show quite different behavior compared with pure forced convection. With flow acceleration along the tube unusual behavior of heat transfer coefficient and friction factor occurs when the fluid enthalpy passes through pseudocritical point of pressure in the tube. There is also a transition behavior from liquid-like phase to gas-like phase in the developing region. Numerical results with constant heat flux boundary conditions are obtained for reduced pressures from 1.09 to 1.99. Graphical results for velocity, temperature, and heat transfer coefficient with Stanton number are presented and analyzed.
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页码：1756 / 1766
页数：10
相关论文
共 23 条
[1]  
Dashevsky Y. M.(1985)Heat Exchange with Laminar Upflow of Supercritical Helium in a Gravitational Field Cryogenics 25 658-659
[2]  
Malkovsky V. I.(1971)Heat Transfer near the Critical Point Advances in Heat Transfer 7 1-83
[3]  
Hall W.B.(1962)Laminar Flow Heat Transfer for Variable Physical Properties Journal of Heat Transfer 84 157-163
[4]  
Koppel L. B.(1995)Numerical Analysis of Deterioration Phenomena in Heat Transfer to Supercritical Water International Journal of Heat and Mass Transfer 38 3077-3084
[5]  
Smith J. M.(1993)Flow Structure and Turbulent Transport of a Supercritical Pressure Fluid in a Vertical Heated Tube under the Conditions of Mixed Convection Experimental Data International Journal of Heat and Mass Transfer 36 3383-3392
[6]  
Koshizuka S.(1999)Turbulent Heat Transfer to Near-critical Water in a Heated Curved Pipe under the Conditions of Mixed Convection International Journal of Heat and Mass Transfer 42 3147-3158
[7]  
Takano N.(1991)Heat Transfer under Supercritical Pressures Advances in Heat Transfer 21 1-50
[8]  
Oka Y.(1969)Deterioration in Heat Transfer to Fluids at Supercritical Pressure and High Heat Fluxes Journal of Heat Transfer 91 27-36
[9]  
Kurganov V. A.(1981)Heat Transfer to a Supercritical Medium with Mixed Convection and Rising Flow in Heated Tubes Teploenergetika 28 69-71
[10]  
Kaptilnyi A. G.(1965)Heat Transfer and Friction for Laminar Flow of Gas in a Circular Tube at High Heating Rate International Journal of Heat and Mass Transfer 8 1281-1301
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