A design criterion aimed at increasing efficiency without reducing total pressure of Controlled Vortex Design rotor-only tube-axial fans is introduced. The criterion is applied to a production axial fan featuring a 0.44 hub-to-tip ratio and an almost constant swirl velocity distribution at the rotor outlet. In particular, the efficiency improvement is attempted for a fan size characterised by a quite low blade Reynolds number. The criterion is exploited performing experimental tests on each rotor defined by the successive steps suggested in the design guidelines.
Increasing the Efficiency of Rotor-only Axial Fans with Controlled Vortex Design Blades
MASI, MASSIMO;CASTEGNARO, STEFANO;LAZZARETTO, ANDREA
2015
Abstract
A design criterion aimed at increasing efficiency without reducing total pressure of Controlled Vortex Design rotor-only tube-axial fans is introduced. The criterion is applied to a production axial fan featuring a 0.44 hub-to-tip ratio and an almost constant swirl velocity distribution at the rotor outlet. In particular, the efficiency improvement is attempted for a fan size characterised by a quite low blade Reynolds number. The criterion is exploited performing experimental tests on each rotor defined by the successive steps suggested in the design guidelines.File in questo prodotto:
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