Air Multipliers and Helmholtz cavities


Five years ago Dyson invented the world’s first bladeless fan, the Dyson Air Multiplier™. Basically they reinvent a phenomenon already known in the scientific community but their marketing team made it to look amazing. Now it is time for them to go a little bit further. To make the same technology a lot quitter. Up to 75% quieter to be exact, while the machines maintain powerful airflow. As for how it works? They are explain it a lot better here: “Air is drawn in by an energy-efficient, brushless motor. Airflow is then accelerated through an annular aperture, passing over an air foil-shaped ramp, which draws in and channels its direction. This creates and projects powerful, smooth, high velocity airflow…”


Reducing the turbulence of high velocity air whilst retaining high performance is a challenge. A key factor for a solution of this challenge is the use of the Helmholtz cavities, reengineered airflow paths, and aerodynamic diffuser. Everything explained on the above video.

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One thought on “Air Multipliers and Helmholtz cavities

  1. Five years ago Dyson invented the world’s first bladeless fan, the Dyson Air Multiplier™. Basically they reinvent a phenomenon already known … adysonair.wordpress.com

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