Air Velocity vs generated Pressure

[Farid]

I have a simple question, can anyone please help. It goes something like this:
if wind is blowing at a velocity of 80 mph against a 2" X 2" plate, how much pressure (or force) is brought upon the plate?
would appreciate the formula, if any.
Thank you.


Farid

 

[russ_watters]

Sounds like homework. Do you have any idea how you might find the answer?

 

[Farid]

Hi Russ,
No, it is not really homework. It is my project at work. However, the surface is area is more complex than I proposed above (2"x2"). Once I know, what method to use, then I can plug in the real "area".
I was going to find Pressure from the Bernoulie Eq. :
dynamic pressure = q= (roh*V^2)/2 or, q=.000256*V^2 [psf]
Once I know the pressure, then I can find the F=p/a, that my surface will be subjected to.
Right?


Farid

 

[russ_watters]

You are correct. A flat plate in a uniform airstream essentially converts all velocity pressure to static pressure via Bernoulli's eq.

 

[Farid]

Thank you.

Farid

 

[stewartcs]

Once I know the pressure, then I can find the F=p/a, that my surface will be subjected to.
Right?

NO, Force does not equal Pressure divided by Area. Force is equal to Pressure times Area.

P = F/A which gives F = P*A

CS

 

[russ_watters]

D'oh. Missed that, thanks.