摘要
提出了一种弯曲流线型(CSWP)涡发生器,采用数值模拟方法对安装弯曲流线型涡发生器的矩形直通道内的传热特性进行了研究,对弯曲流线型涡发生器的综合强化效果进行了评估,考察了弯曲流线型涡发生器形状、安装位置和数量对传热性能的影响,分析了压力和涡量分布,揭示了强化机理。结果表明,在Re=4000~26 000时,与平面三角翼(PDWP)涡发生器相比,弯曲涡发生器可以有效降低流动阻力,从而具有较高的综合传热性能。与弯曲矩形(CRWP)和弯曲梯形(CTWP)涡发生器相比,CSWP涡发生器具有更好的综合强化效果。当攻角一定时,涡发生器前缘倾角越小,数量越多,综合强化效果越好。CSWP涡发生器具有的流线型外缘结构能够显著降低流动阻力,并能够提高速度场与温度场之间的协同性,是其具有较高综合强化效果的原因。
The longitudinal vortex generator is widely used as an effective passive heat transfer enhancement method.Vortex generators enhance the mixing between fluids by generating vortex motion,thereby improving heat transfer performance,but also generating flow resistance.Therefore,the development of longitudinal vortex generators with lower resistance and better overall performance is a research focus in this field.The geometric structure and placement position of the vortex generator are important factors affecting its comprehensive heat transfer performance.In this work,a curved streamline winglet pair(CSWP)vortex generator is proposed to improve the performance of the streamline vortex generator.The heat transfer characteristics in the rectangular straight channel where the curved streamline winglet pair vortex generator is installed are studied by numerical simulation,and the comprehensive strengthening effect of the curved streamline winglet pair vortex generator is evaluated.The influence of the shape,quantity,and installation position of the curved streamline winglet pair vortex generator on the heat transfer performance is investigated.The results show that in the range of Re=4000~26000,compared with the plane delta wing winglet pair(PDWP)vortex generator,the curved vortex generator can effectively reduce the flow resistance,so it has a higher overall heat transfer performance.Compared with curved rectangular winglet pair(CRWP)and curved trapezoidal winglet pair(CTWP)vortex generators,CSWP vortex generators have better comprehensive strengthening effects.When the angle of attack is constant,the smaller the inclination angle of the leading-edge of the vortex generator,the more the quantity,and the better the comprehensive strengthening effect.The CSWP vortex generator has a streamline structure of the leading-edge that can significantly reduce the flow resistance and improve the synergy between the velocity field and the temperature field,which is the reason for its high comprehensive strengthening effect.
作者
张丽
张凯丽
张莹
李雅侠
张静
Li ZHANG;Kaili ZHANG;Ying ZHANG;Yaxia LI;Jing ZHANG(School of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang,Liaoning 110142,China;School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang,Liaoning 110142,China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2024年第2期182-192,共11页
The Chinese Journal of Process Engineering
基金
辽宁省百千万人才工程项目(编号:2020B085)
辽宁省教育厅面上项目(编号:LJKMZ20220764)
辽宁省应用基础研究计划项目(编号:2023JH2/101300006)。
关键词
涡发生器
弯曲流线型
强化传热
矩形通道
场协同理论
vortex generator
curved streamline winglet pair
heat transfer enhancement
rectangular channel
field synergy principle
