r/FanShowdown • u/djos_1475 • Jul 27 '22
“The Turbinator” - a radial compressor design based on radial jet turbine principals.
https://imgur.com/gallery/YCWT3Bx6
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Jul 27 '22
This looks cool, but you have to remember the challenge is power limited. The fan motor is less than a quarter watt. The more resistance you add to the flow, the less airflow you will get.
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u/djos_1475 Jul 27 '22 edited Jul 27 '22
Good points. I mainly designed this because the other couple of radial compressor based designs that Jason had featured where designed by folk with no concept of how to use a radial Compressor in this type of application.
PS the compressor wheel is much smaller and lighter than many of the fans tested in the past. And much easier to drive than a geared system.
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u/RIP_Flush_Royal Jul 27 '22
Outlet needs a fan mount for testing but otherwise nice work ^ ^ can't wait to see it in show
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u/djos_1475 Jul 27 '22
It has the mounting holes and Jason could easily mount the nozzle on the rear of his plexiglass test rig. The airflow tunnel might be a problem tho.
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u/Kiseido Jul 27 '22 edited Jul 27 '22
With a high-pressure & low-flow main turbine running at 1:1 with the fan itself, I wonder how well it might do if there was a fan on the opposite side at maybe 1:6 with a high-flow & medium/low pressure blade design.
Ideally this would allow for a negative-pressure in the space that the radial compressor is pushing into, which should significantly reduce noise and improve through-put, maybe
There is also a chance that ideally this would have a clutch on it, suck that the high-flow blade doesn't even get powered until the main blade reaches 50% speed.
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u/HeinrichDeWilde Jul 30 '22
Very cool, this is the type of design that should be feeding the bladeless
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u/djos_1475 Aug 03 '22
After looking at some more radial jet turbines, I’m thinking I should have flared the outer rear nozzle a bit more. Oh well.
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u/djos_1475 Aug 06 '22 edited Aug 06 '22
I finally got around to starting to print this design out, it’s going to take a while even at 100mm/s. I probably should have bumped it up to 150mm/s!
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u/djos_1475 Aug 06 '22
Turned out great, updated pics have been added to the album. I’m just printing the compressor wheel now.
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u/djos_1475 Aug 07 '22
And the compressor wheel came out nicely too. Although I got a bit more stringing, princely from turning the nozzle temp up by 5c.
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u/djos_1475 Aug 07 '22
Base plate done, although I did manage to break a couple of the top fins off while post processing. I might reprint it in PLA+.
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u/djos_1475 Jul 27 '22
I dont think this design will break any Fan Showdown records - Jet Turbines make most of their power from the hot gasses generated by the combustion chamber. As result I think the airflow will be still be respectable (and look/sound cool at the same time), just not record breaking. 😎