What is the Coanda effect? (with photo)

The Coanda effect occurs when air is forced away from the wing of an aircraft in flight, pushing it upward.

The Coanda effect states that a flow of fluid or gas will encircle a convex contour when directed at a tangent to that surface. This was discovered in the 1930s by a Romanian named Henri-Marie Coanda. What is unusual about the Coanda effect is the fact that the flow of fluid or gas is pulled very strongly by a curved surface. A concave curve will naturally push the flow, but the fact that a convex curve reacts so strongly to fluid or gas is unusual. This property is particularly relevant to aircraft design.

This principle was discovered and tested by Coanda in an airplane. He studied his aircraft for over 20 years to prove that the air along the wing of the plane will be deflected downwards due to the shape of the wing. The air leaves the wing, pushing the plane up and giving it lift. This move naturally results in a Coanda effect.

A Coanda effect can also be applied to modern aircraft. With a Coanda thruster, air is ejected from the front of the body and attaches to the surface before flowing towards an upper surface. Connected air flowing in a sheet is called a Coanda jet, which flows towards the rear of the impeller. This results in the suction of a large amount of air from the surrounding atmosphere. Instead of positive air pressure at the front and negative pressure at the rear, the opposite of drag, also known as thrust, occurs.

See also  What is a proton?

Another important application of the Coanda effect is in circulation control wing technology. A Coanda surface is formed from the short, flat surface of a levitation device. The purpose of circulation control wing technology is to use surface and slot blowing to replace lifting devices at the edges of a wing. The first use of this app was on a Boeing 707.

As all applications of a Coanda effect involve a fluid object flowing over a solid, the science behind this effect is known as fluid dynamics. Fluid dynamics represents the movement of liquids or gases. Studying this science can lead to many important discoveries, such as the Coanda effect.

Leave a Comment