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本文阐述了风机噪声产生的原因,着重对空气动力噪声进行了机理分析。以此为根据,作者在风机设计与研究中,采用了航空上的一些先进技术,并提出了一些切实可行的降噪方法,其中有的已通过实验验证,具有良好的降噪效果。文中着重分析了风机叶片叶型对噪声的影响,并根据理论分析和实验结果,找到了精选低噪声风机叶片的主要原则。
This article describes the causes of fan noise, focusing on the aerodynamic noise mechanism analysis. Based on this, the authors adopted some advanced technologies in aviation design and research, and put forward some practical noise reduction methods, some of which have been verified by experiments and have a good noise reduction effect. In this paper, the influence of fan blades on the noise is analyzed emphatically. According to the theoretical analysis and experimental results, the main principles of selecting low noise fan blades are found out.