82
Didn't realise that windmill blades are serrated
(lemmy.world)
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 16 Jun 2023
82 points (98.8% liked)
UKCasual
6052 readers
1 users here now
A friendly place to chat.
No politics please. Don't be a dick.
founded 1 year ago
MODERATORS
They disrupt the trailing edge eddies - which is what causes any noise - and so make them quieter. They are often fitted in areas where sound might be a particular issue.
So why don't my CPU/case fans have serrated edges as well? Because they are too small?
Some do, e.g. Noctua: https://noctua.at/en/vortex-control-notches