基于合成双射流的空调散热装置设计与优化

Design and optimization of air-conditioning heat sink based on dual synthetic jet

针对发热元件的热流密度越来越高所导致的散热问题成为制约微小型电子器件发展的瓶颈,将轻型零质量合成双射流技术应用于空调外机控制器以探索其热管理能力,通过数值模拟对翅片结构进行了改进,比较了原始翅片、改进翅片、合成双射流与原始翅片组合散热的散热效果,结果表明:翅片高度和厚度的增加均能强化换热;与原始翅片相比,改进翅片、实例1(加合成双射流)、实例4(加合成双射流)散热效率分别提高10.88%,20.70%和26.58%,说明组合散热效果更好;在组合散热及合成双射流作用下翅片间出现涡对,增强了空气掺混,对流换热增强,且射流湍流度越高,散热性能越强.最后对原始翅片和组合散热开展了红外实验,验证了合成双射流散热的高效性和可行性.

With the development of electronic components towards miniaturization,the heat flux density of heating components is higher and higher,and the heat dissipation problem has become the bottleneck restricting the development of microelectronic components. In this study,the light zero mass dual synthetic jet(DSJ) technology was applied to the external controller of the air conditioner to explore its heat management ability. Through numerical simulation,the fin structure was improved,and the heat dissipation effects of the original fin,the improved fin,and the combined heat dissipation of the dual synthetic jet and the original fin were compared.The results show that the increase of fin height and thickness can strengthen the heat transfer.Compared with the original fin,the heat dissipation efficiency of the improved fin,Case 1(DSJ) and Case 4(DSJ) is increased by 10.88%,20.70%,and26.58% respectively,indicating that the combined heat dissipation effect is better. When combined heat dissipation,vortex pairs appear between fins under the action of dual synthetic jet,which enhances air mixing and convective heat transfer,and the higher the jet turbulence,the stronger the heat dissipation performance. Then infrared experiments were carried out on the original fins and combined heat dissipation to verify the efficiency and feasibility of dual synthetic jet heat dissipation.