从气动声学理论出发，探讨了贯流式风机气动噪声机理及不等节距叶片频率调制降噪的机理。

Based on the theory of airacoutics, the mechanism of denoising of cross_flow fan and the modulation of unequal spaced blades is discussed.

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摘要：通过实验，论述贯流风扇的中节由于结构的差异，所造成风量的不同。

ABSTRACT Based on the experiment, this article expatiates the flow rate diversity of cross-flow fan due to middle part structure different.

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