Questions tagged [fan]
The fan tag has no usage guidance.
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FreeCAD/OpenFOAM vs Paid CFD Software
I am a mechanical engineer who is dipping his toes in CFD for a work project, where we have an array of axial fans in a tower and we're trying to optimise the airflow (its actually two towers facing ...
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are ducted fans better than turbines generating vaccum?
Basically I want to make a trap that sucks mosquitoes into a screen container for future studies, to do this I need to generate a vacuum and I need to choose whether to use a ducted fan (simpler) or ...
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Why is the fan efficiency zero at high flow rate?
How is the fan efficiency zero at the highest flowrate point (at which there is zero pressure rise)? I know the fan efficiency is given as
$fan\_efficiency = output\_power/input\_power$
where ...
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How can I estimate the shape of stator vanes to straighten the flow of an axial fan?
I have an axial 140 mm fan which I need to connect to a duct and I need to design a converging duct as adaptor from circular to the shape and size of the duct I have.
From past experiences, an axial ...
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Aerodynamic design and characteristic of fan vs blower
I just learnt about the difference between a fan and a blower, namely the former providing high flow rate at very low outlet pressure (<1.1*inlet) and the latter providing a slightly increased ...
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Help me choose an approach to gpu cooler design
I want to remake my gpu's cooler cause the original fans have a terrible bearing sound on low rpm and no amount of software solution helped.
Anyway, I want to use 3x nf-a9x14 pwm 92mm fans as its fits ...
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What are rule of thumb or technical standard for industrial fan?
I want to design a small centrifugal fan to transport wood dust. Is there any Handbook or ISO/DIN/ASME standard for industrial fan? For example, number of blade, hub size, shaft diameter, blade ...
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Why does my self-made air pump not blow air in the correct direction?
I am embarking on a project for building a low-noise air pump for use with things such as air mattresses or pool toys. I just find that the pumps sold at stores are way too noisy, plus it looked like ...
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Why does a centrifugal fan work better than an axial fan for high pressure drop systems?
I read that this is true, but I cannot understand why. Conversely, I heard that Axial fans are better for low pressure systems where large volumes of air need to be moved.
More info on centrifugal vs ...
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Failure of component due to natural frequency vs stress
lets take a component like a fan blade as an example. Is it right to conclude that it will fail even when the stress is within permissible limits but its operating frequency is close (close enough ...
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Radial fan with both input and output on the same plane
An axial fan moves air from one side to the other, where the fan is placed on the plane normal to the axis:
A radial fan, moves air from a normal axis to the same plane where the fan runs:
Is there ...
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Multiple inline fans
I have a chimney with a single 100 cfm exhaust fan. If I would add a second similar fan in the same chimney,in line with the first fan, what would happen? Would I move 200 cfm? Would I still move 100 ...
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How to theoretically determine the flow rate for a fan design?
I am trying to design a ducted axial fan. The fan will be pulling air through a filter, and ejecting out into the atmosphere (For a CO2 direct air capture application). However I want to start with ...
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Scroll design for off the shelf tangential/cross flow fan rotor
I'm trying to figure out a somewhat optimized fan scroll shape for a cross flow fan rotor I aquired. However I seem to have vastly underestimated the complexity as I have a lot of trouble finding ...
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What is the purpose of springs in rotor's ventilator/fan
In my lawmower's motor plastic fan/ventilator on rotor has broken to few pieces
There are 2 small springs in fan's slots.
What is the purpose of these springs?
Are there any standards for such ...
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