Can someone explain Bernouilli's Principle to me in regards to airfoils and air(fluid) movement over them?

Question

Also explaining the inverse proportion of velocity.

Answer 1

I see some people left some links. I will try and break it down the way it was broken down for me. :)
Basically, bernouilli's principle says that when a fluid's velocity decreases, it's pressure increases and when it'spressure decreases, it's velocity increases. we know that an airfoil has a curved surface on top and a flat surface on the bottom. when the airfoil passes through the air, the air is more or less cut in half. The velocity of the air passing over the top of the airfoil increases which means the pressure decreases. The velocity of the air passing below the airfoil decreases, increasing pressure and creating lift. Although the reason an airfoil work has a lot to do with Newton's laws as well, in fact some say that Newton's laws have more to do with flight than bernouilli's principle. Here is a link to a really great website that explains both of them and their relationship a little better.
Bernouilli's Principle -- http://www.allstar.fiu.edu/aerojava/flight32.htm
Newton's Law's as they apply to flight -- http://www.allstar.fiu.edu/aerojava/airflylvl3.htm

I really reccommend the second site. I am an A&P Aircraft Mechanic and also a Commercial Pilot and I read over both of these site's frequently to brush up on my aerodynamics. :) I hope this helps at least some.

Answer 2

Wikipedia has a great definition at: http://en.wikipedia.org/wiki/Bernoulli's_principle

Answer 3

Very good "rage"

that is the winning answer !

Answer 4

http://theory.uwinnipeg.ca/mod_tech/node68.html