The Effects of Inlet Box Aerodynamics on the Mechanical Performance of a Variable Pitch in Motion Fan

<table>Normalized efficiency variation relative to the duty point for the original five stay and improved eight stay plus eight inlet guide vane configurations for four flow conditions: duty point, 10% and 20% above and 5% below.</table>

Advances in Acoustics and Vibration

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Figure 12

Figure 12: The Effects of Inlet Box Aerodynamics on the Mechanical Performance of a Variable Pitch in Motion Fan 