合成双射流与小型复合结构翅片组合散热参数影响

为了保证电子设备能有足够长的工作寿命并可以在高热流下安全运行, 必须可靠而经济地解决高温设备的散热冷却问题. 为解决狭小空间板翅式翅片强化换热能力有限的问题, 基于纵向涡强化换热理论, 提出了合成双射流与表面微凸起复合结构翅组合散热方法. 利用Fluent数值模拟软件对合成双射流作用下的复合结构翅片内部气体流动特性及其强化换热特性进行了研究. 仿真结果表明表面微凸起复合结构翅片的肋片附近Y方向涡量是传统光滑肋片的2倍以上, 换热性能增加10%. 合成双射流驱动频率在500 Hz时, 具有均匀的温度分布以及更好的散热效果; 合成双射流峰值速度下散热效率更好. 

Parameter Influence on Combined Heat Dissipation of Dual Synthetic Jets and Small Composite Fins

In order to ensure that electronic equipment can have a long enough working life and can operate safely under high heat flow, the problem of heat dissipation and cooling of high temperature equipment must be solved reliably and economically. In order to solve the problem of limited heat transfer capability of plate-fin structures in a narrow space, a heat dissipation method combining dual synthetic jets and surface micro-convex composite fins was proposed based on the theory of longitudinal vortex enhanced heat transfer. Using the Fluent software, the internal gas flow characteristics of the composite fin and its enhanced heat transfer characteristics under the action of dual synthetic jets were studied. The simulation results show that the vortex in the Y direction near the surface micro-convex composite fins is more than twice that of the traditional smooth fins, and the heat transfer performance is increased by 10%. When the driving frequency of the dual synthetic jet is 500 Hz, it has a uniform temperature distribution and better heat dissipation effect. The heat dissipation efficiency is better at the peak speed of dual synthetic jets.