CPU空气强迫对流冷却系统设计

根据空气强迫对流冷却系统一体化设计理念,对9238CPU风扇进行空气动力设计,由Fortran程序输出三维空间曲线文件,导入Pro/E实现实体造型.通过标准风洞对CNC铣床雕刻出的样品进行风扇性能测试.根据风扇数值模拟结果(风扇出口流场特性)设计系列放射状散热器.采用分块六面体网格技术,应用多参考旋转坐标系模型和RNG k-ε模型对风扇和曲线型散热器进行整体数值模拟,模拟结果表明曲线型散热器相对传统垂直型散热器热阻值降低15.9％,最后通过实验证明数值模拟的可信性.一体化设计思想指导下的系列散热器能达到高性能散热效果.

CPU Air Forced Convection Cooling Systems Design

According to integration design concept of forced air convection cooling system aerodynamic design of small axial-flow 9238 fan for the CPU is implemented.File of 3D curves which are produced from Fortran procedure are imported into Pro/E to build solid modeling.The performance curve of fan prototype which is fabricated by CNC is measured in a standard wind tunnel.To reduce costs and shorten the design time,CFD is carried out to predict the performance of fan.According to outflow angle of fan series of radial heat sinks are developed.Based on the hexahedral block-grid strategy the numerical simulation is carried out on systems of fan and streamlined heat sink with Multiple Rotating Reference Frame and RNG k- ε Model.Results show that resistance of the streamlined heat sink reduces by 15.9％when compared to the traditional heat sink.The numerical simulation proves to be true by the experiment.Series of heat sinks can reach the aim of high thermal exchange effect under the direction of the integration design concept.