Aarti Gupta
Last Activity: 10 Years ago
Some of the applications of Bernoulli's theorem
are as follows:-
- 1.Bernoulli's principle can be used to
calculate the lift force on an airfoil if the behaviour of the fluid flow
in the vicinity of the foil is known. For example, if the air flowing past
the top surface of an aircraft wing is moving faster than the air flowing
past the bottom surface, then Bernoulli's principle implies that the
pressure on the surfaces of the wing will be lower above than below. This
pressure difference results in an upwards lifting force. Whenever the distribution
of speed past the top and bottom surfaces of a wing is known, the lift
forces can be calculated using Bernoulli's equations.
- 2.The carburetor used in many reciprocating
engines contains a venturi to create a region of low pressure to draw fuel
into the carburetor and mix it thoroughly with the incoming air. The low
pressure in the throat of a venturi can be explained by Bernoulli's
principle; in the narrow throat, the air is moving at its fastest speed
and therefore it is at its lowest pressure.
- 3.The Pilot tube and static port on an
aircraft are used to determine the airspeed of the aircraft. These two
devices are connected to the airspeed indicator, which determines the dynamic pressure
of the airflow past the aircraft. Dynamic pressure is the difference
between stagnation pressure
and static pressure. Bernoulli's principle is used to calibrate the
airspeed indicator so that it displays the indicated air speed appropriate
to the dynamic pressure.
- 4.The flow speed of a fluid can be measured
using a device such as a Venturi meter or an orifice plate, which can be placed into a
pipeline to reduce the diameter of the flow. For a horizontal device, the
continuty plate shows that for an incompressible fluid, the reduction in
diameter will cause an increase in the fluid flow speed. Subsequently
Bernoulli's principle then shows that there must be a decrease in the
pressure in the reduced diameter region. This phenomenon is known as the
Venturi effect.
- Thanks & regard
- Aarti Gupta
- askiitians Faculty