Schooling fish inspire enhanced wind turbines

John Dabiri, head of the California Institute of Technology (Caltech) Biological Propulsion Laboratory, studies water- and wind-energy concepts that share the theme of bioinspiration: that is, identifying energy-related processes in biological systems that may provide insight into new approaches to – in this case – wind energy.

’I became inspired by observations of schooling fish and the suggestion that there is constructive hydrodynamic interference between the wakes of neighbouring fish,’ said Dabiri, associate professor of aeronautics and bioengineering at Caltech. ’It turns out that many of the same physical principles can be applied to the interaction of vertical-axis wind turbines.’

The biggest challenge with current wind farms is a lack of space. The horizontal-axis wind turbines most commonly seen – those with large propellers – require a substantial amount of land to perform properly. ’Propeller-style wind turbines suffer in performance as they come in proximity to one another,’ said Dabiri.

In the Los Angeles basin, the challenge of finding suitable space for such large wind farms has prevented further progress in the use of wind energy. However, with help from the principles supplied by schooling fish, and the use of vertical-axis turbines, this may change.