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Oct 02, 2005, 02:56 PM
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Joined Dec 2004
85 Posts
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Torque value for Wemotec Midi Fan 90mm
Hi,
Can someone please tell me the torque values as function of RPM for Wemotec midi fan 90mm?? Also can someone explain how to calculate thrust and torque values for a ducted fan. I know Momentum theory and Blade element theory which are used to calculate propeller thrust and torque. Thanks |
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Oct 02, 2005, 03:10 PM
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Joined Nov 1999
12,986 Posts
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Just calculte it as you would an air mover, figureing the average pitch as driving the calculation for thrust. It is quite different from a propellor driven system as the airfoil in the blades provide such little force in producing thrust. Yes I know there is more to it than that but it will get you started.
Eric B. |
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Latest blog entry: T/A 37 Tweet/Dragonfly
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Oct 02, 2005, 03:18 PM
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Joined Dec 2004
85 Posts
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but i don't know average pitch value for Wemotec midi fan 90mm. Can you please tell me that if you know?
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Oct 02, 2005, 03:40 PM
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Joined Nov 1999
12,986 Posts
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The root pitch is 53*, the tip pitch is 30*.
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Last edited by AirX; Oct 02, 2005 at 03:44 PM.
Reason: Edit picture and wording
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Oct 02, 2005, 03:41 PM
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Joined Dec 2004
85 Posts
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thank you so much Eric
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Oct 03, 2005, 12:15 AM
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Joined Dec 2004
85 Posts
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can someone provide me thrust vs RPM plot for this fan??
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Oct 03, 2005, 04:39 PM
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San Bernardino, CA
Joined Aug 2003
6,517 Posts
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I know there is a graph here somewhere. My search isn't turning it up. I am just getting into larger than 70mm fans at the moment, and didn't have a need to save that information back when I saw it.
 Good luck!Justin |
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Oct 03, 2005, 06:19 PM
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St. Mary, Maryland, United States
Joined Dec 1996
7,762 Posts
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www.wemotec.com you can also look through the old EDF columns for some RPM measurements and watt input figures.
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Oct 03, 2005, 07:17 PM
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Stavanger, Norway
Joined Feb 2000
7,961 Posts
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Very comprehensive listing:
http://www.kontronik.com/dowload.htm#midi |
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Oct 04, 2005, 03:26 AM
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Joined Dec 2004
85 Posts
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What is "VStrahl" in the linked excel file for Midi fan on the kontronik website. Is it efflux velocity of air coming out of fan after stators?
thanks |
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Oct 04, 2005, 03:58 AM
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Wareham, Dorset, UK
Joined Dec 2003
1,912 Posts
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Yes
Klaus |
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