Collection D

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Performance of rotor-only axial fans designed for minimum exit kinetic energy
(South African Institution of Mechanical Engineers, 2002) Van der Spuy, S. J.; Von Backstrom, T. W.
The major loss source in rotor-only axial fans is the kinetic energy associated with the axial and circumferential components of the exit flow. This paper investigated the aerodynamic and acoustic performance of two fans designed to produce minimum exit kinetic energy. The first was a general application fan and the second a low-noise fan with large-chord forward-swept blades. The fans were tested for fan noise and performance in accordance with BS 848. The low-noise fan was the quieter and more efficient of the two fans, whilst both fans were quieter and more efficient than an existing typical general application fan, of unknown design. The results underlined the importance of following a well-defined design methodology when designing rotor-only axial flow fans.