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Numerical Investigation on Vortex Structure and Aerodynamic Noise Performance of Small Axial Flow Fan

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Figure

Figure 1. Fan prototype.
Figure 7. Sound power level contour of broadband noise of revolution surfaces. (a) R = 24 mm; (b) R = 45 mm
Figure 10. Velocity streamlines for the axial sections Xmm and  = 0 X = 3 mm. (a) X = 0 mm; (b) X = 3 mm
Figure 12. Velocity streamlines at different times within a one-seventh of the rotation cycle
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