涡流发生器强化暖气片散热特性的数值研究

Numerical Investigation of Enhancement Heat Dissipation Characteristics of the Radiator With Vortex Generators

本文提出了一种基于纵向涡流发生器强化换热结构的暖气片散热器,并对其散热性能进行了数值模拟研究,着重分析了暖气片附近区域的温度场与速度场,基于场协同原理对其强化传热机理进行了解释,同时讨论了三角翼纵向涡流发生器的攻角与布置间距等关键参数对散热性能的影响。结果表明,涡流发生器能显著增强散热,当三角翼纵向涡流发生器攻角为45°、布置间距为30 mm时的散热可提高8%。

In this paper,a radiator based on longitudinal vortex generators is proposed,and its heat dissipation performances are numerically studied.The temperature field and the velocity field near the radiator are analyzed with emphasis,and the mechanism of heat transfer enhancement is explained based on the field synergy principle.The effects of key parameters,such as angle of attack and spacing on the heat dissipation performances are discussed.The results show that the vortex generators can significantly enhance the heat dissipation which can be increased by 8%in the case with the attack angle of the delta winglet longitudinal vortex generators being 45°and the spacing being 30 mm.