Research Article
The Mechanical Impact of Aerodynamic Stall on Tunnel Ventilation Fans
Table 3
Safety factor derived from strain gauge data for a fan at full and part speed without a fitted stabilisation ring.
| | Fan type | % Full speed | Normal operation safety factor | Stalled operation safety factor |
| | Plane casing, stalling blade angle | 100 | 2.3 | 0.3 | | Plane casing, stalling blade angle | 50 | 10.0 | 2.5 | | Plane casing, stalling blade angle | 25 | 106.0 | 7.3 |
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