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

- Model.Results show that resistance of the streamlined heat sink reduces by 15.9％when compared to the traditional heat sink.The numerical si

mulation 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.