Finnbot@lemmy.world to UKCasual@lemmy.worldEnglish · 2 years agoDidn't realise that windmill blades are serratedmessage-squaremessage-square28fedilinkarrow-up183arrow-down10file-text
arrow-up183arrow-down1message-squareDidn't realise that windmill blades are serratedFinnbot@lemmy.world to UKCasual@lemmy.worldEnglish · 2 years agomessage-square28fedilinkfile-text
Took the weans a walk away up the back of The Three Towns in Ayrshire where they are installing these big bad boys.
minus-squareTrail@kbin.sociallinkfedilinkarrow-up2·2 years agoSo why don’t my CPU/case fans have serrated edges as well? Because they are too small?
minus-squareGreyShack@lemmy.worldlinkfedilinkarrow-up4·2 years ago Because they are too small? Could be. As is said so often: physics doesn’t scale. Trailing edge eddies may not be the major source of the noise in this anyway - since these are pushing air not being pushed by it.
minus-squareSiamanguel@lemmy.worldlinkfedilinkarrow-up3·2 years agoSome do, e.g. Noctua: https://noctua.at/en/vortex-control-notches
So why don’t my CPU/case fans have serrated edges as well? Because they are too small?
Could be. As is said so often: physics doesn’t scale. Trailing edge eddies may not be the major source of the noise in this anyway - since these are pushing air not being pushed by it.
Yeah that makes sense I guess.
Some do, e.g. Noctua: https://noctua.at/en/vortex-control-notches