效率低、噪声大是国产风机的共有缺点 ,作者以工业过程普遍应用的轴流风机为研究对象 ,分析建立了轴流风机效率与噪音模型 ,以此为基础构建了轴流风机通流构件综合设计的目标函数 ,提出、界定了轮毂比、叶轮外径、叶片数、叶轮强度等约束条件 .针对综合目标函数的强非线性、存在离散变量的特点 ,提出一种高效遗传算法 ,对一典型型号轴流通风机的通流构件进行了全局优化 .理论分析与实验测试结果均表明 ,通过全局优化设计后 ,提高了轴流风机的效率 ,降低了噪音 The low efficiency and high noise are the common shortcomings of domestic wind turbines. The author takes the axial fans commonly used in industrial processes as the research object, and analyzes the efficiency and noise model of the axial fans, on the basis of which, The objective function of the design is proposed and the constraints of the hub ratio, the outer diameter of the impeller, the number of vanes and the strength of the impeller are defined.For the strong nonlinearity of the integrated objective function, there are some characteristics of the discrete variables and a highly efficient genetic algorithm is proposed. The global optimization of the through-flow components of the axial flow fan is carried out.The theoretical analysis and experimental results show that the efficiency of the axial fan is improved and the noise is reduced by the global optimization design