Numerical study on heat transfer and flow resistant characteristics of supercritical water in internally ribbed tubes

ZHAO Zhenxing; DENG Lei; WANG Xiangyu; CHE Defu

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Numerical study on heat transfer and flow resistant characteristics of supercritical water in internally ribbed tubes

Thermal Power Generation Vol. 44, Issue 2, Pages: 24-30(2015)

更新时间：2025-09-28

- Numerical study on heat transfer and flow resistant characteristics of supercritical water in internally ribbed tubes
- 作者机构：
  
  西安交通大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK124
- Published：2015
- 稿件说明：
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ZHAO Zhenxing, DENG Lei, WANG Xiangyu, et al. Numerical study on heat transfer and flow resistant characteristics of supercritical water in internally ribbed tubes[J]. Thermal Power Generation, 2015, 44(2): 24-30.
DOI：

ZHAO Zhenxing, DENG Lei, WANG Xiangyu, et al. Numerical study on heat transfer and flow resistant characteristics of supercritical water in internally ribbed tubes[J]. Thermal Power Generation, 2015, 44(2): 24-30. DOI：

摘要

对超临界水在不同结构参数的竖直内螺纹管内的流动和传热特性进行数值模拟研究

重点分析了内螺纹管的螺旋升角、相对螺纹宽度和相对螺纹高度在不同质量流速和热流密度条件下对传热和阻力特性的影响规律。结果表明:内螺纹管的传热系数和阻力系数均随升角的减小而增加;相对螺纹宽度的变化对内螺纹管的传热和阻力特性几乎无影响;随着相对螺纹高度的增加

传热系数和阻力系数均增加。通过对内螺纹管的综合性能分析

结构参数对超临界流体传热和阻力特性的影响顺序依次为螺旋升角、螺纹高度、螺纹宽度。

Abstract

The heat transfer and flow characteristics of supercritical water in vertical internally-ribbed tubes with different structural parameters were numerically studied.Especially

the effects of spiral rising angle

rib width and rib height on the heat transfer and flow characteristics of supercritical water were investigated.The results show that

the heat transfer coefficient and fiction resistance coefficient increase with the decreasing spiral rising angle

while the rib width has a weak influence on the heat transfer and fiction resistance.As the relative rib height increases

the flow turbulent intensity increases

leading to an increase in heat transfer coefficient and fiction resistance coefficient to a certain extent.According to the thermal-hydraulic performance evaluation criterion

the influence of structural parameters is in such an order:the spiral rising angle

the rib height and the rib width.

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