Bernoulli Principle

The Free essays given on our site were donated by anonymous users and should not be viewed as samples of our custom writing service. You are welcome to use them to inspire yourself for writing your own term paper. If you need a custom term paper related to the subject of Physics or Bernoulli Principle , you can hire a professional writer here in just a few clicks.
Airflow over an airfoil Flight is one of the most important achievements of mankind. We owe this achievement to the invention of the airfoil and understanding the physics that allow it to lift enormous weights into the sky. All flight is the result of forces acting upon the wings of an airplane that allow it to counteract gravity. Contrary to popular belief, the Bernoulli principle is not responsible for most of the lift generated by an airplanes wings. Rather, the lift is created by air being deflected off the wings and transferring an upward force to those wings. The most important factor in determining the lift generated by an airplane is the angle of attack. The angle of attack is the degree measure from the horizontal that a wing is elevated or declined. When the angle of attack is between 1 and 20 degrees, the most lift is generated. To find the lift generated by a particular area of wing in a standard airfoil shape, a teardrop with the fat end facing forward, the equation L=Cl 1/2 (pV2)S. Cl is the lift coeficent, which is determined by the shape of the airfoil and the angle of attack. P stands for the air mass density, V for the velocity of the air passing over the wing, and S for the area of the wing when viewed from above or below. As the air flows over the wing producing lift, it grabs onto the wings surface and causes drag. Drag can be measured by the equation D=Cd 1/2 (pV2)S, much like the lift equation. The drag coeficent Cd is found, again, by determining the shape of the airfoil and then finding the angle of attack. Drag is less than lift up to a certain angle of attack. After that, the air encountering the surface of the wing is either pushed off or deflected in a way to cause turbulance. So, what does lift and drag have to do with airflow? As hinted in the above paragraph lift and drag are directly related to the shape of the airfoil. A special property of liquids is this, they will tend to follow a surface that is gently curved. When air rushes over an airfoil at a 10 degree angle, the air passing over the surface of the wing follows the curvature. When the air finally leaves the trailing edge of the wing it now has a downward velocity. The air on the bottom of the wing is also deflected downwards, however, not at such a steep angle. Since every action has to have an equal and opposite reaction, the change in direction and velocity of the air is transferred to the airplane as lift. The major forces that interact on an airplane are simple. There is forward velocity provided by the engines. An angled upward vector pro

Our inspirational collection of essays and research papers is available for free to our registered users

Related Essays on Physics

"Superstrings: A Theory Of Everything&Q

Since our "creation", man has always been interested in nature and her inner workings because she is what is all around us. Man's curiosity has lead him to physics, "the study of all of nat...

Einstein: Cultural Icon

Einstein: Cultural Icon What can a hero be defined as? A hero impacts the world around them in such a way as to effect the views of views of everyone from the average man to the rocket sci...

Physics Of Lift

The Physics of Flight One of the most novel forms of physics is that of aerodynamics, the study of flight and the effects of gases over an airfoil. The study of aerodynamics was furthered by a f...

Albert Einstein And The Theory Of Relativity

Albert Einstein was known for The Theory of Relativity (E = mc^2) which in based on twoprinciples:I. Principle of Special Relativity- All inertial observers are equivalent.II. Constancy of Veloc...

Stars And Galaxies

Stars and galaxies began to form about one billion years following the Big Bang, and since then the universe has simply continued to grow larger and cooler, creating conditions conducive to l...

Black Holes

Black Holes If theories of their existence are true, black holes are the most powerful force in the known physical universe. Many people are familiar with the term black hole, but few people...

электроды для сварки алюминия

лечение бесплодия

планирование беременности