一种串并联流道冷板的流动和换热特性数值研究

Numerical Investigation on the Flow and Heat Transfer Characteristics of a Series-parallel Channel Liquid Cold Plate

液冷冷板是机架散热系统中的关键部件,其换热性能与机载电子设备的换热效果密切相关。文中设计一种内腔两端攻丝的串并联流道冷板,采用数值模拟研究了流道结构、入口流量和入口温度对冷板的流动和换热特性的影响。结果表明:与传统的串联流道冷板相比,相同条件下该冷板有较好的换热性能和温度一致性,即换热系数较大、温度分布标准差较小。此外,冷却液流量和温度共同作用,影响冷板的换热性能,特别是流量对冷板换热性能具有显著的影响。研究证明了本文设计的冷板符合工程应用要求,可为工程项目提供设计指导。

Liquid cold plate is a key component in the heat transfer system of an airborne rack. Its heat transfer performance is closely related to the heat transfer performance of the airborne electronic device.In this paper,a series-parallel channel with tapping at both ends of the inner cavity for liquid cold plate is designed. The influence of channel structure,inlet flow rate and temperature of coolant on the flow and heat transfer characteristics of the liquid cold plate is researched by numerical simulation. The results show that,compared with the traditional liquid cold plate with series channel,the liquid cold plate designed in this paper has better heat transfer performance and temperature consistency under the same conditions,namely the heat transfer coefficient is higher and the standard deviation of temperature distribution is lower. In addition,the flow rate and temperature of coolant act together to affect the heat transfer performance of the liquid cold plate. Especially,the flow rate has a significant effect on the heat transfer performance. The research also proves that the liquid cold plate meets the requirements of engineering application and can provide design guidance for engineering projects.