Abstract
A caudal fin shaped blade for use on a horizontal axis tidal current turbine is designed by bio-mimicking the Blue Marlin fish caudal fin. A method for forming the blade includes the steps of defining a traditional horizontal axis tidal turbine using a symmetrical airfoil comprising nine airfoil stations placed at 10 percent of the blade, determining a twist angle distribution by creating a twist angle distribution rule for root airfoil and tip airfoil and using a third order polynomial function passing through the centre of each airfoil to twist the blade from root airfoil to tip airfoil.
| Original language | English |
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| Patent number | GB2532989A |
| IPC | F03B 13/26,F03B 3/12 |
| Priority date | 5/12/14 |
| Filing date | 5/12/14 |
| Publication status | Published - 8 Jun 2016 |