梯形通道内超临界CO_(2)印刷电路板式换热器流动传热特性研究  

Study on Flow and Heat Transfer Characteristics of Supercritical CO_(2)Printed Circuit Heat Exchanger in Trapezoidal Channel

作　　者：李松 吴江波 于志斌 董浩楠 LI Song;WU Jiangbo;YU Zhibin;DONG Haonan(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050

出　　处：《机床与液压》2025年第4期178-184,共7页Machine Tool & Hydraulics

基　　金：2022甘肃省高等学校产业支撑计划(2022CYZC-21)。

摘　　要：为了探究梯形截面通道印刷电路板式换热器(PCHE)内部强迫对流特性的影响,明确几何参数对换热器换热特性的作用,采用数值模拟的方法,针对通道弯折角度(0°、10°、20°、30°)和通道节距(8、12、16 mm)两个关键几何参数展开研究。当流体流经弯折角处时,详细监测流体流动状态的变化,包括湍流动能和流动速度的改变,以此来分析其对冷热通道换热性能的影响。在模拟过程中发现,当流体流经弯折角处时,流动状态发生显著变化,流体湍流动能提升,流动速度变慢,但冷热通道换热性能得到提升。其中,当弯折角度为30°、通道节距为8 mm时,换热器性能的表现最佳。In order to investigate the influence of forced convection characteristics in trapeze channel printed circuit heat exchanger(PCHE),and clarify the role of geometric parameters on the heat transfer characteristics of the heat exchanger,through numerical simulation method,the two key geometric parameters of channel bending angle(0°,10°,20°,30°)and channel pitch(8 mm,12 mm,16 mm)were studied.When the fluid flowed through the bending angle,the changes of the fluid flow state,including the change of turbulent flow energy and flow velocity,were monitored in detail to analyze its effect on the heat transfer performance of the hot and cold channels.In the simulation process,it is found that when the fluid flows through the bending angle,the flow state of the fluid changes significantly,the fluid turbulence kinetic energy increases,the flow speed slows down,and the heat exchange performance of hot and cold channels improves.The heat exchanger performs best at the bending angle of 30°and a channel pitch of 8 mm.

关 键 词：超临界二氧化碳(sCO_(2)) 印刷电路板式换热器 流动传热特性 转折角 通道节距 

分 类 号：TK172[动力工程及工程热物理—热能工程]