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Questions tagged [fan]

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29 questions
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0 votes
1 answer
74 views

Looking at the fan in the attached photo, its cage takes a lot of surface on both sides. Does this cause a significant reduction of blowing efficiency or can it be ignored in the sense that it won't ...
Cassian's user avatar
  • 25
0 votes
0 answers
38 views

I have a Micornel U65HN product, and I am experiencing issues with the blower. The fan is not spinning freely when I try to turn it by hand. I have already performed an electrical check, and ...
Koniki's user avatar
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1 vote
1 answer
85 views

I currently have a 24" chimney fan rated at about 10000 CFM blowing through a 24" tube. If I were to make a cone so that I could install a 32" fan to blow through the same 24" tube,...
Geo's user avatar
  • 13
9 votes
4 answers
6k views

100% of all PC cooling fans from 90s to today, from 40mm to 200mm, from budget to most expensive high performance models, they all use thin blades. Why? Airplanes wings and propellers use more complex ...
wav scientist's user avatar
  • 309
0 votes
1 answer
120 views

On my office ceiling there are a few air vents. They are usually inactive, yet a few days per year (for some incomprehensible reason) they start working, and air flows in. What concerns me is the ...
user1317811's user avatar
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-1 votes
2 answers
219 views

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 ...
Kendric Rendle-Short's user avatar
  • 17
0 votes
2 answers
123 views

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 ...
RHR's user avatar
  • 3
0 votes
1 answer
96 views

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 ...
GRANZER's user avatar
  • 337
1 vote
0 answers
163 views

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 ...
FarO's user avatar
  • 179
1 vote
0 answers
88 views

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 ...
temporary_pigeon's user avatar
  • 11
1 vote
2 answers
168 views

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 ...
Nah's user avatar
  • 13
0 votes
0 answers
57 views

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 ...
Maaruf Bussri's user avatar
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0 votes
1 answer
182 views

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 ...
Meruje's user avatar
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0 votes
1 answer
207 views

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 ...
imagineerThat's user avatar
  • 101
0 votes
1 answer
47 views

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 ...
AJAY SARAF's user avatar
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