MINIMIZATION OF THE EXIT LOSS OF A ROTOR-ONLY AXIAL FAN

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Abstract
The main loss source in rotor-only axial fans is that associated with the kinetic energy flux at the Tan exit. Both the axial and the tangential velocity components contribute to this loss. In this paper the loss is minimized by sequential quadratic programming under the constraints of constant volume flow and work input. It is shown that, when observing certain simple traditional fan design rules, the exit kinetic energy flux can be reduced by only 1.8 percentage points compared to Tree vortex Tans.

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