Help Newtonian mechanics and Bernoulli/Venturi effect in generating lift

In summary, Newtonian mechanics is a theory that explains the motion of objects under the influence of forces. It is the foundation of classical mechanics and is used to describe the behavior of objects in the world around us. In the context of aerodynamics, this theory helps to explain the generation of lift on an airplane wing through the third law of motion. The Bernoulli principle, which states that an increase in fluid speed results in a decrease in pressure, also plays a role in lift generation. Additionally, the Venturi effect, which causes a fluid to speed up as it flows through a constricted space, contributes to lift on an airplane wing. These principles are essential in modern aircraft design, allowing engineers to optimize wing shape and curvature for more
  • #1
50936
8
0
Hello, this question is about lift in fixed wing flight (airplanes).

Is it possible to calculate separately the lift generated by:
- Newton's laws (wings deflecting air particles)
- Bernoulli effect (difference in air pressure above and below the wings caused by the shape of the wings(?))

Any suggestions on how to do this?
 
Engineering news on Phys.org
  • #2
this is just a suggestion

in Newton's model use the wing area A and the air pressure P=1/3 [tex]\rho[/tex] v2 to calculate lifting force f=PA

for Bernoulli it's more complicated.
 
  • #3
If you mean calculate from scratch, both are extremely difficult.
 

1. What is the Newtonian mechanics theory?

Newtonian mechanics is a theory developed by Sir Isaac Newton to describe the motion of objects under the influence of forces. It is based on three laws of motion: the law of inertia, the law of acceleration, and the law of action and reaction. This theory is the foundation of classical mechanics and is used to explain the behavior of objects in the world around us.

2. How does Newtonian mechanics relate to lift?

In the context of aerodynamics, Newtonian mechanics helps to explain the generation of lift on an airplane wing. According to the third law of motion, for every action, there is an equal and opposite reaction. When air flows over the curved surface of a wing, it creates a downward force, which is balanced by an equal and opposite upward force, resulting in lift.

3. What is the Bernoulli principle?

The Bernoulli principle states that an increase in the speed of a fluid (such as air) results in a decrease in pressure. In the context of aerodynamics, this means that as air flows over the curved surface of a wing, its speed increases on the top surface, resulting in a decrease in pressure. This pressure difference between the top and bottom of the wing creates lift.

4. How does the Venturi effect contribute to lift?

The Venturi effect is a phenomenon where the speed of a fluid increases as it flows through a constricted space. In the case of an airplane wing, the curved shape creates a narrowing of the airfoil, causing the air to speed up as it flows over the top surface. This increase in speed results in a decrease in pressure, contributing to the generation of lift.

5. What role do these principles play in modern aircraft design?

The principles of Newtonian mechanics and the Bernoulli/Venturi effect are essential in modern aircraft design. Understanding how air flows over a wing and the factors that contribute to lift allows engineers to design more efficient and effective aircraft. By optimizing the shape and curvature of wings, designers can create lift more efficiently, resulting in better performance and increased safety for aircraft.

Similar threads

  • Mechanical Engineering
Replies
2
Views
3K
  • Classical Physics
Replies
30
Views
3K
Replies
4
Views
1K
Replies
5
Views
2K
Replies
14
Views
3K
  • Mechanical Engineering
Replies
1
Views
2K
  • Mechanics
Replies
7
Views
2K
Replies
22
Views
4K
  • Mechanical Engineering
Replies
1
Views
5K
Replies
1
Views
1K
Back
Top