Numerical simulation of convective heat transfer for supercritical CO<sub>2</sub> in inclined tubes

YANG Chuanyong1; XU Jinliang2; WANG Xiaodong3; ZHANG Wei2 1.Beijing Key Laboratory of New and Renewable Energy

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Numerical simulation of convective heat transfer for supercritical CO₂ in inclined tubes

Thermal Power Generation Vol. 42, Issue 1, Pages: 26-35(2013)

更新时间：2025-09-28

- Numerical simulation of convective heat transfer for supercritical CO₂ in inclined tubes
- 作者机构：
  
  1. 能源的安全与清洁利用北京市重点实验室
  2. 新能源电力系统国家重点实验室
  3. 低品位能源多相流与传热北京市重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK124
- Published：2013
- 稿件说明：
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YANG Chuanyong1, XU Jinliang2, WANG Xiaodong3, et al. Numerical simulation of convective heat transfer for supercritical CO₂ in inclined tubes[J]. Thermal Power Generation, 2013, 42(1): 26-35.
DOI：

YANG Chuanyong1, XU Jinliang2, WANG Xiaodong3, et al. Numerical simulation of convective heat transfer for supercritical CO₂ in inclined tubes[J]. Thermal Power Generation, 2013, 42(1): 26-35. DOI：

摘要

对倾角为30°的倾斜圆管内超临界参数CO2的对流换热过程进行数值模拟

分析了管壁热流量和入口质量流量对换热特性的影响。利用相对二次流动能定量表示二次流大小

得到了壁温和传热系数周向分布规律以及上母线传热系数、摩擦系数和相对二次流动能K沿管道的分布规律。模拟结果表明

上母线壁温高于下母线

顶部周向壁面温度高于底部

壁面热流量对上母线的传热系数、摩擦系数和相对二次流动能影响较小

入口质量流量对其影响较大。

Abstract

Numerical simulation of convective heat transfer for supercritical CO2 in circle tubes with an inclination of 30° was determined to investigate the influence of heat flux and inlet mass flow rate on the heat transfer characteristics.Using the relative secondary flow kinetic energy K to express the secondary flow intensity quantitatively

the distribution of tube wall temperature and heat transfer coefficient in tube circumference

the heat transfer coefficient at top generatrix

the Fanning friction factor and the relative secondary flow kinetic energy K were obtained.The results showed that

the tube wall temperature at top generatrix was higher than that at the bottom generatrix

and the top circumferential wall temperature was higher than that at the bottom.The heat flux had less effect on heat transfer coefficient

the Fanning friction factor

and the relative secondary flow kinetic energy K at top generatrix

but the influence of inlet mass flow on them was greater.

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Numerical simulation of convective heat transfer for supercritical CO2 in inclined tubes

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摘要

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Numerical simulation of convective heat transfer for supercritical CO₂ in inclined tubes