超临界二氧化碳圆腔自然对流流动传热研究

doi:10.3969/j.issn.1008-0198.2023.04.001

湖南电力 ›› 2023, Vol. 43 ›› Issue (4): 1-8.doi: 10.3969/j.issn.1008-0198.2023.04.001

• 研究与试验 • 下一篇

超临界二氧化碳圆腔自然对流流动传热研究

叶茂菁, 吴天宇, 刘铠瑞, 王利民, 车得福

西安交通大学能源与动力工程学院,陕西西安 710100

收稿日期:2023-07-14 修回日期:2023-07-28 出版日期:2023-08-25 发布日期:2023-09-07
通信作者: 王利民(1988),男,博士,副教授,通信作者,主要研究方向为深度调峰背景下燃煤发电机组灵活性理论与技术。
作者简介:叶茂菁(1998),男,硕士研究生,主要研究方向为超临界CO₂非稳态流动传热。
基金资助:
陕西省自然科学基础研究计划(2023-JC-QN-0482)

Study on Natural Convective Flow Heat Transfer in Supercritical Carbon Dioxide Cavity

YE Maojing, WU Tianyu, LIU Kairui, WANG Limin, CHE Defu

School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710100, China

Received:2023-07-14 Revised:2023-07-28 Online:2023-08-25 Published:2023-09-07

摘要/Abstract

摘要： 水平流动的超临界二氧化碳(S-CO₂)在加热或冷却条件下会发生流动分层现象,从而导致管内顶部和底部发生不同的传热现象。为研究垂直流动方向上浮升力驱动下的流动传热行为,基于二维圆腔的物理模型,研究了S-CO₂自然对流发展过程及压力、管径、温度区间对发展过程的影响。结果表明:远离拟临界温度区间的流动传热发展过程相较于拟临界温度区间相对稳定;在拟临界温度区间内,压力越大,传热发展过程越快;在拟临界温度区间内,管径越大,传热达到稳定的时间越长,主流区在发展的初始阶段越剧烈。

关键词: 超临界二氧化碳, 流动传热, 自然对流, 数值模拟

Abstract: Horizontal flow of supercritical carbon dioxide (S-CO₂) will flow stratification under heating or cooling conditions, resulting in different heat transfer phenomena at the top and bottom of the tube. In order to study the flow heat transfer behavior driven by upward lift in vertical flow direction, the development process of S-CO₂ natural convection and the influence of pressure, pipe diameter and temperature interval on the development process are studied based on a two-dimensional circular cavity physical model. The results show that the development process of flow heat transfer away from the pseudo-critical temperature range is relatively stable compared with the pseudo-critical temperature range. In the pseudo-critical temperature range, the higher the pressure, the faster the heat transfer development process. In the pseudo-critical temperature range, the larger the diameter of the pipe, the longer the time for heat transfer to reach stability, and the more intense the main flow zone is in the initial stage of development.

Key words: supercritical carbon dioxide, flow heat transfer, natural convection, numerical simulation

中图分类号:

TK124

叶茂菁, 吴天宇, 刘铠瑞, 王利民, 车得福. 超临界二氧化碳圆腔自然对流流动传热研究[J]. 湖南电力, 2023, 43(4): 1-8.

YE Maojing, WU Tianyu, LIU Kairui, WANG Limin, CHE Defu. Study on Natural Convective Flow Heat Transfer in Supercritical Carbon Dioxide Cavity[J]. Hunan Electric Power, 2023, 43(4): 1-8.

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超临界二氧化碳圆腔自然对流流动传热研究

Study on Natural Convective Flow Heat Transfer in Supercritical Carbon Dioxide Cavity

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