I’m trying to find out what purpose this type of design serves and how they are designed but have hit a wall with knowing what to even look for.
This piece of the voron stealthburner is the only example I can think of off the top of my head but I have seen them before in some sort of fan duct or funnel thing.
This guy’s got the facts straight. Some 3D printers are in fact reasonably optimized, but also have to contend with pricing by way of complexity slowing down each print, plus post-processing… Easiest thing for most people to do is add a bigger fan. There will be a few situations where that’s not possible.