能源工程2026，Vol.46Issue(3)：26-31,6.DOI:10.16189/j.nygc.2026.03.004
超临界二氧化碳在水平微通道管内流动与传热特性的直接数值模拟
Direct numerical simulation of flow and heat transfer characteristics of supercritical CO2 in horizontal micro-channels
张杰 1范志伟 2王强 1肖刚 1樊建人1
作者信息
- 1. 浙江大学能源高效清洁利用全国重点实验室,浙江 杭州 310027
- 2. 浙江新劲空调设备有限公司,浙江 丽水 323700
- 折叠
摘要
Abstract
This study employs direct numerical simulation(DNS)to investigate the flow and heat transfer characteristics of supercritical carbon dioxide(sCO2)in circular micro-channels.The effects of heat flux density,mass flow rate,pipe diameter,and pressure on the heat transfer coefficient are analyzed,and the roles of buoyancy and flow acceleration effects on heat transfer performance are discussed.The results show that reducing heat flux density or increasing mass flow rate can enhance overall heat transfer,decrease the intensity of secondary flows,reduce temperature gradient differences,and minimize irreversible losses.To improve the heat transfer capability of supercritical CO2,it is recommended to reduce pipe diameter,decrease heat flux density,lower pressure,and increase mass flow rate,while operating close to the pseudo-critical temperature.关键词
超临界二氧化碳/数值模拟/流动/传热Key words
supercritical carbon dioxide/numerical simulation/flow/heat transfer分类
能源科技引用本文复制引用
张杰,范志伟,王强,肖刚,樊建人..超临界二氧化碳在水平微通道管内流动与传热特性的直接数值模拟[J].能源工程,2026,46(3):26-31,6.
