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Join Date: Jan 2017
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# Specifications of the Motor Required to Operate a Blower of Dia 2m

01/29/2017 9:36 PM

hey there! I am constructing a wind tunnel as my college project. I wanted to know about which kind of motor should I use if I wanted to operate a blower of dia 2m.

Also any suggestions regarding wind tunnel and balancing and mounting of blades are welcome.

Thanks!

Pathfinder Tags: aerospace motor wind tunnel
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Guru

Join Date: Mar 2007
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#1

### Re: specifications of the motor required to operate a blower of dia 2m

01/29/2017 9:47 PM

Depends on the wind speed specification you will be working with....

http://www.amphioxus.org/content/wind-tunnel-insect-flight-research

https://www.alibaba.com/showroom/wind-tunnel.html

 For Fans and Blowers HP = HP = HP = Where CFM = Cubic Feet per Minute PSF = Pounds per Square Foot PIW = Inches of Water Gauge PSI = Pounds per Square Inch Efficiency of Fan = %/100

http://www.scienceforums.net/topic/25944-cfm-to-mph/

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#9

### Re: specifications of the motor required to operate a blower of dia 2m

01/31/2017 10:36 PM

Solar eagle. Is there not an, " American Made " fan that you can suggest to purchase, instead of a Chinese one ?

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#2

### Re: specifications of the motor required to operate a blower of dia 2m

01/29/2017 10:09 PM

Contact NASA Ames Research Centre and describe your project. Also NASA Glenn Research Centre. Be sure you've done your homework first as these guys' time is very valuable.

Is it a subsonic wind tunnel? Supersonic?

You've decided on a 2-metre fan. How? What mass of air do you need to accelerate, to what velocity, against what pressure? Do you know? If not, possibly this will help narrow these parameters down a bit.

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#4

### Re: specifications of the motor required to operate a blower of dia 2m

01/30/2017 12:48 AM

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#3

### Re: specifications of the motor required to operate a blower of dia 2m

01/29/2017 11:53 PM

As suggested, you need to determine how much air you need to move and at what velocity.

Is the two meter diameter fan a requirement?

Before worrying about motor size you'll need to know how much work it has to do.

Mounting and balancing blades are simply internet searches to get ideas.

Define the power needed!

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#5

### Re: specifications of the motor required to operate a blower of dia 2m

01/30/2017 3:47 AM
• Depends upon the electrical supply available.
• Depends upon the power needed to turn the blades.
• Depends upon the speed of the blades.
• Etc.
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#6

### Re: specifications of the motor required to operate a blower of dia 2m

01/30/2017 6:47 AM
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#7

### Re: specifications of the motor required to operate a blower of dia 2m

01/30/2017 6:55 AM

The shaft power needed by any fluid mover is the double-integral of the pressure rise and the flowrate through it (for the special case of an incompressible fluid it is the pressure rise multiplied by the volumetric flowrate).

<...which kind of motor...>

Without knowing how much air is needed to be moved and at what speed through what size and shape duct, starting at what ambient pressure and temperature, the answer is .

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#8

### Re: Specifications of the Motor Required to Operate a Blower of Dia 2m

01/31/2017 12:26 AM

Assuming you will want variable speed for variable wind velocities, you also need to think about what form of speed control you will use. Fortunately, motor speed controls have come way down in price in recent years...

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