We improved FFD extrapolation operator to compensate the amplitude difference generated by geometry diffusion loss.

通过改进傅立叶有限差分的延拓算子，补偿了几何扩散损失引起的振幅误差。

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The research on diffusion loss of axial-flow fan's diffuser is carried out using theory calculation method and FLUENT software.

利用理论计算方法以及FLUENT软件对轴流通风机扩散筒的扩散损失进行了研究。

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