Axial Fan Noise Reduction

Proposed 100k conventional attenuators for 10 axial mine water evaporation fans in australia would have had zero effect in the noise as it was predominantly low frequency tones hum or drone.

Axial fan noise reduction.

4 fan speed in axial or centrifugal flow fans you can increase noise control simply by changing control systems or pulley sizes and resetting dampers. Keywords axial fans condenser fans noise control noise reduction tonal noise order reprints in applications relating to refrigeration air conditioning and ventilation technology users frequently notice that the selected fan installed in the device does not run as quietly as expected. So in many cases it is possible to achieve a large noise reduction from a small drop in fan speed by changing control systems or pulley sizes and re setting dampers. The noise sources on axial fans are usually caused by the fluctuating pressure distribution on the surface of fan blade.

A few emails and 20k gave 23db noise reduction and improved efficiency. It reduces room to room noise by up to 46db. The design of axial fans typically considers the efficiency but also the reduction of noise. Axial or centrifugal flow fans.

Axial fan noise reduction is a rather huge and complex topic when it comes to all the details but there are a few simple geometry techniques that you can apply to your standard blade designs to immediately lower the fan s noise level. 5 pneumatic exhausts pneumatic exhaust noise can be reduced by up to 30db by fitting silencers. In this paper a ring silencer design for reducing the noise of axial fans is presented.