... 局部速度涨落 流量计的nlocal velocity fluctuation 局部音速 local sonic speed 局域相似 local similarity ...
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local sonic speed 局部声速
local sonic pressure 局部声速区压强
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.
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。
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