化工进展2024，Vol.43Issue(2)：830-843,14.DOI:10.16085/j.issn.1000-6613.2023-1515
不同流向上小流道加热管内超临界CO2的压降特性
Pressure drop characteristics of supercritical CO2 in heating mini-channel with different flow directions
摘要
Abstract
The pressure drops characteristics of supercritical CO2 fluid in a heating mini-channel with an inner diameter of 0.75mm under varying flow direction conditions were investigated experimentally.The results showed that the Different flow directions(horizontal flow,vertical upward flow,and vertical downward flow),the total pressure drop,frictional pressure drop,and accelerational pressure drop consistently decreased with the increase in system pressure,but increased with the rise of mass flow rate,heating power,and inlet temperature,irrespective of the flow directions.Conversely,the gravitational pressure drop increased with the increase of system pressure and mass flow rate,but decreased with the increase of heating power and inlet temperature in vertical flow directions.When the system parameters were held constant,the frictional pressure drop was the most significant proportion to the total pressure drop,while the gravitational pressure drop contributed the least.A comparison of the pressure drop data across two different inner diameters revealed that the total pressure drop of the supercritical CO2 fluid was consistently higher in smaller diameters,highlighting the significant impact of tube diameter on total pressure drop changes.关键词
超临界CO2/不同流动方向/总压降/摩擦压降/加速度压降/重力压降Key words
supercritical CO2/different flow direction/total pressure drop/frictional pressure drop/accelerational pressure drop/gravitational pressure drop分类
力学引用本文复制引用
王磊,曹雄金,罗凯,王艳,费华..不同流向上小流道加热管内超临界CO2的压降特性[J].化工进展,2024,43(2):830-843,14.基金项目
国家自然科学基金(52366015,51966004) （52366015,51966004）
江西省教育厅科学技术研究项目(GJJ2200817,GJJ210813) （GJJ2200817,GJJ210813）
江西理工大学高层次人才资助项目(205200100620). （205200100620）
