Abstract
The noise emission of fans changes as a function of the operating point. Airflow and acoustic fan plenum experiments can be used to characterize these effects to estimate noise under installed conditions. Recently, the concept of iso‐acoustic fan curves was introduced by various authors, and results were presented for small radial blowers and some axial fans. The current paper presents an analysis of the iso‐acoustic fan curves for an extensive set of 92 mm axial fans. An analysis is presented of the airflow and acoustic performance of these fans, and expressions for the iso‐acoustic fan curves are derived and presented. This allows a direct comparison between the various fans based on operating point conditions.
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