Rotational Noise Reduction for Axial Flow Fans. 1st Report.

End-plate for noise-by-flow control in axial fans

The paper presents a design procedure for anti-vortex endplates that are fitted to tip limited blades of the subsonic axial fans utilised in compact cooling units. The authors study the impact of tip leakage vortex bursting on the performance of the studied class of fans. The vortex breakdown occurs in the swirling flows at a blade’s tip, and is found to be a flow feature associated with the pr...

A Procedure for Design of the Axial Flow Fans

A Procedure for Design of the Axial Flow Fans

Local improvement of flow and noise performances of axial-flow fans in a household refrigerator

In this paper, numerical and experimental investigations on an axial-flow fan with grooved/double-sectional blades are performed to improve its performance in terms of volume flow rate and noise at a local operating point. The target fan is used to cool a mechanical room of a household refrigerator. However, it is found that the target system has more resistance than that for which the fan is o...

Basic Guidelines for Plastic Conversion of Metal Axial Flow Fans

This paper compares the performance of two alternative HVAC fan designs: a five-blade injection molded thermoplastic design, against the more traditional three-blade stamped metal version. The study was conducted using computational fluid dynamics techniques, along with finite element structural analysis, in which we attempted to optimize the air movement characteristics of the fan, as well as ...