对通风机叶轮修割的意义分别在气动性能、机械性能、安全性和经济性方面来阐述。
The signification of fan impeller repair is set forth in respects of aerodynamic, mechanical property, safety and economy.
本文的第一部分介绍了一种离心叶轮气动优化的新方法，且特别侧重介绍其基本思想。
A new method for optimization of aerodynamic design for centrifugal impellers is presented in the first part of this paper, and especially the essential thought of this method is described.
文章主要综述了国内外对局部扇风机气动噪声的研究与控制方法，对孤立叶轮的声学模型及其噪声控制方法。
The paper summarizes mainly the research and control of pneumatic noise of local fan, the sonic model of isolated blade wheel and the control method of noise in home and foreign countries.
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