针对轴流风机需具有较宽的平稳运行工况范围要求,在模糊集理论的基础上讨论一种多工况数值优化方法,以多个工况下的加权平均全压及效率为优化目标函数,采用模糊关系矩阵确定权重因子.运用拉丁超立方实验设计方法结合CFD数值计算生成设计空间样本点,通过多目标优化算法对建立的Kriging近似模型进行寻优.此方法用于一低压轴流风机的三维多工况优化设计结果表明:优化后风机平稳工况范围加大,最大效率提高幅度为3.7％,最大全压相对增加9.6％,取得较好的优化效果.
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