A fan blade that loses flow at high angles stalls, and the two ways around it — bigger motors or slower, smoother blades — both cost.
WhalePower copied the tubercles on a humpback whale's flipper onto rotating devices, first a small turbine and then large high-volume-low-speed (HVLS) fans.
The bumps keep air attached longer, so the fan moves more air with the same or less power and runs quieter than a conventional smooth blade, and WhalePower licenses the geometry to makers of fans, cooling towers and motors.
Put bumps on the leading edge, not a smooth blade
It fixes the flow physics (stall) rather than just adding power to compensate.
Tubercles are passive, so they add no weight, moving parts or control cost.
Less noise is a marketable benefit in fans and data centres, not just a side effect.
The same geometry applies to pumps, compressors, hydro and marine thrusters.
A bump on an edge is not a manufacturing flaw — it can be the whole design.
WhalePower built fans for clients in cooling towers, diesel engines and computer cooling and licensed the tubercle geometry to others, with reported efficiency gains on the order of 20% in the devices it equipped.
FOLLOW THE EVIDENCE
The sources
- The Tubercles on Humpback Whales' Flippers: Application of Bio-Inspired Technology Integrative and Comparative Biology (Oxford) · doi.org
- WhalePower: Tubercle Technology Biomim'expo · biomimexpo.com ·