基于传统的风扇设计方法,提出了风扇参数化设计和流场分析程序.采用VB开发了CPU轴流风扇空气动力设计软件和风扇参数化设计模拟软件,使用者只需输入风扇的基本结构参数,便可由程序自动生成高质量的六面体网格,能自动进行批处理模拟和结果后处理.最后采用该软件快速对风扇的结构参数进行性能分析,加深了CPU风扇各主要技术参数在风扇整体性能中影响程度的认识,为进一步的优化设计提供了条件.实践证明该方法能大大提高风扇设计者的工作效率,具有重大工程应用价值.

Based on conventional design concept of the fan,the procedure of the parametric design and numerical simulation with application to the axial-flow fan is developed.The procedure and aerodynamic design process of the CPU fan are embodied into parametric design and numerical simulation software utilizing VB language as well as axial-flow fan aerodynamic design software,which can generate high quality HEXA mesh automatically.The numerical simulation can also be performed continuously by batch program and the results about performance curve of the fan can be characterized without resorting to anyone.At last geometry parametric investigations achieved quickly by the procedure are carried out to illustrate the effect of various design parameters on the performance of the fan by choosing one parameter at a time as the control variable,which can provide a more in depth understnding of the flow characteristic of the fan and deep understanding for the optimum of the fan.The procedure can be adopted widely to help engineers to improve work efficiency in practice.