Table 2

Optimization results of axial fan.

  Original design Optimized design Improvable design
Impeller speed (rpm) 980 1450 *
Blade number 9 8 *
Outlet speed (m/s) 10–15 20–30 Reduced leaf top clearance
Static pressure (Pa) 800–1100 1500–2300 Increase blade curvature
Shaft power (kw) 78 90 *
Noise (dB) 75 69 *
Air volume (m3/s) 20.4–32.6 28.6–54.8 Increase blade deflection

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