Re: Fan backwash problem - new parts to fix January 04, 2014 07:32AM |
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Re: Fan backwash problem - new parts to fix January 04, 2014 06:17PM |
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Re: Fan backwash problem - new parts to fix January 04, 2014 07:21PM |
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Re: Fan backwash problem - new parts to fix January 04, 2014 07:30PM |
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Re: Fan backwash problem - new parts to fix January 04, 2014 08:25PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 05:01AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 05:30AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 05:30AM |
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Rory166
Relying on this analysis it would be interesting to try a design which would direct the airflow back into the fan all around the circle. In other words a fixed multibladed fan with blades angled opposite to the rotating fan or to put it another way a contra rotating fan fixed in place. Similar to the static blades in a jet engine compressor.
Rory
Re: Fan backwash problem - new parts to fix January 05, 2014 06:49AM |
Registered: 10 years ago Posts: 256 |
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ormerod168
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Rory166
Relying on this analysis it would be interesting to try a design which would direct the airflow back into the fan all around the circle. In other words a fixed multibladed fan with blades angled opposite to the rotating fan or to put it another way a contra rotating fan fixed in place. Similar to the static blades in a jet engine compressor.
Rory
..incoming train of thought - If anyone happens to have a 10mm fan, design an print out one static counterclock running ditto as an ad-on, maybe a 10mm will put more air through than the 20mm when fed correctly, and it would take care of all backwash for sure
This is how a vacuum cleaners are build to ad to the static pressure, moving part, static counter ditto, moving part etc.
If I could design and print I would make one, but I'm not there yet
Erik
Re: Fan backwash problem - new parts to fix January 05, 2014 07:30AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 08:08AM |
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droftarts
I guess the only other thing to check is that the nozzles put out a similar amount of cooling air as before.
Ian
RepRapPro tech support
Re: Fan backwash problem - new parts to fix January 05, 2014 09:10AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 10:38AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 11:25AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 11:36AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 11:45AM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 11:52AM |
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kwikius
Here is next incarnation. of the circular foil version
regards
Andy
Re: Fan backwash problem - new parts to fix January 05, 2014 02:03PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 02:19PM |
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Quote
Rory166
Re 10mm fans, what about having two 10mm fans with 2 perhaps 3 of these static deflectors attached to make a higher pressure compressor. The idea of the 3rd one would be to catch the rotational element of the output and direct it forward.
Re: Fan backwash problem - new parts to fix January 05, 2014 02:27PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 02:35PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 02:41PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 03:36PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 04:27PM |
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kwikius
Ormerod168 Rory166
I hit the print button just before I read your posts!
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Hey certainly not wasting my time. This is my 4th print. I'm learning with each one and they only take < 2 m of filamant per go!
regards
Andy
Re: Fan backwash problem - new parts to fix January 05, 2014 05:10PM |
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Re: Fan backwash problem - new parts to fix January 05, 2014 05:35PM |
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Quote
Rory166
Andy
I am interested in your pitot, my crude experiments indicate the first nozzle has much less flow than the others. I did design baffles to address this but an not printing yet. [tinkercad.com]#
Rory
Re: Fan backwash problem - new parts to fix January 05, 2014 05:56PM |
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Re: Fan backwash problem - new parts to fix January 06, 2014 11:11AM |
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Re: Fan backwash problem - new parts to fix January 06, 2014 02:22PM |
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Re: Fan backwash problem - new parts to fix January 07, 2014 06:11AM |
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