涡发生器攻角对带翼型肋PCHE传热特性的影响研究  

Influence of Vortex Generator Angle of Attack on Heat Transfer Characteristics of PCHE with Airfoil

作　　者：韩佳彤 唐凌虹 Han Jiatong;Tang Linghong(School of New Energy,Xi’an Shiyou University,Xi’an 710065,China)

机构地区：[1]西安石油大学新能源学院,西安710065

出　　处：《机电工程技术》2025年第4期72-77,165,共7页Mechanical & Electrical Engineering Technology

基　　金：陕西省自然科学基础研究计划(2023-JC-YB-350)。

摘　　要：涡发生器(Vortex Generator,VG)是一种用于增强流体流动和换热性能的装置。它们通常被安装在流体流动的通道内,通过产生纵向涡旋来增加流体与热交换表面的接触,从而提高换热效率。通过数值模拟方法,采用SST k-ω湍流模型进行求解,利用Fluent材料模型中自带的NIST Real Gas模型来描述甲烷的物性,采用Simple算法来处理压力与速度耦合的关系。针对纵向涡发生器(LVGs)不同攻角对带翼型肋板式换热器(PCHE)传热特性影响的问题,分析了在7 MPa压力下,不同攻角(15°、30°、45°、60°)的VGs对带翼型肋PCHE传热性能的影响,并与光通道进行了对比。结果表明,增加入口速度可以提高传热效率;在攻角为45°时,换热性能最好,所以适当调整LVGs的攻角能够在提高热传递效率的同时,控制压降的增加,从而优化PCHE的综合传热性能。Vortex generators(VGs)are devices designed to enhance fluid flow and heat transfer performance.They are typically installed within fluid flow channels to create longitudinal vortices,thereby increasing the contact between the fluid and the heat exchange surface,which in turn improves heat transfer efficiency.Numerical simulation methods are employed,with the SST k-ωturbulence model used for solving,and the NIST Real Gas model from Fluent's material model is utilized to describe the properties of methane.The SIMPLE algorithm is applied to handle the coupling relationship between pressure and velocity.The study focuses on the impact of different angles of attack of longitudinal vortex generators(LVGs)on the heat transfer characteristics of plate heat exchangers with wing-type ribs(PCHE).The analysis was conducted under a pressure of 7 MPa,examining the effect of VGs with different angles of attack(15°,30°,45°,60°)on the heat transfer performance of PCHE with wing-type ribs,and comparing it with a smooth channel.The results indicate that increasing the inlet velocity can enhance heat transfer efficiency;the best heat transfer performance is achieved at an angle of attack of 45°.Therefore,appropriately adjusting the angle of attack of LVGs can optimize the overall heat transfer performance of PCHE by improving heat transfer efficiency while controlling the increase in pressure drop.

关 键 词：印刷电路板式换热器 超临界LNG 涡发生器 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]