Duct with flow control-aircraft maintenance, Other Engineering

Duct With Flow Control-Aircraft maintenance:

BERNOULLI'S THEOREM

This theorem can be related to the relationship between pressure and velocity existing in the air flowing through a duct, such as a jet engine. The theorem states that the total energy per unit mass is constant for a fluid moving inside a duct and that total energy consists mainly of pressure energy and kinetic energy:
• Pressure energy.
In gas or fluid flow the pressure energy is more often called ‘static pressure' and it can be defined as the pressure that would be felt by a body which was submerged in the medium (gas or fluid) and moving at the same velocity as the medium.

• Kinetic energy.
This kind of energy is more often called ‘dynamic pressure' and this term is used to define the extra pressure created by the movement of the medium. Dynamic pressure is proportional to ½ mass x velocity 2 (ie. ½mv2).
When the medium (gas or fluid) is moving, the total energy = static pressure + dynamic pressure.
Consider a duct which is filled with an incompressible fluid and pressurised from one end by an external force. The other end of the duct is sealed by a valve, which can be opened or closed, and a pressure gauge is fitted into the wall of the duct to indicate the static pressure (PS). With the valve closed, static pressure and total energy are the same. However, when the valve is opened to allow a fluid flow, the circumstances changes and, although the total energy must remain the same, it now consists of static pressure + dynamic pressure. As the velocity V increases, so dynamic pressure increases and the static pressure is reduced.

 

25_flow control.png

Posted Date: 9/11/2012 7:11:01 AM | Location : United States







Related Discussions:- Duct with flow control-aircraft maintenance, Assignment Help, Ask Question on Duct with flow control-aircraft maintenance, Get Answer, Expert's Help, Duct with flow control-aircraft maintenance Discussions

Write discussion on Duct with flow control-aircraft maintenance
Your posts are moderated
Related Questions
The design and implementation of an autonomous guidance system requires knowledge and an understanding of a wide range of technologies, from the physical dynamics of the vehicle (i

#questi1.) A house has 0.5 cm thick single-pane glass window 2m by 1.5m .The temperature is 20 degrees Celsius and the outside temperature is -20 degrees Celsius .If there is an ai

Explain the process of manufacturing ordinary Portland cement by vertical shaft rotary kiln method and write chemistry of hardening and setting of it with chemical equations.  D

variation of energy bands with alloy composition

why is only 1 lime and sod required for aluminium impurities

what are the different phosphates used in water treatment?

Fuel properties of Aircraft: EASE OF FLOW The ease of flow of a fuel is mainly a question of viscosity, but impurities such as ice, dust, wax, etc., may cause blockages in

This case has been framed in order to test the skills in evaluating a credit request and reaching a correct decision. Perluence International is large manufacturer of petroleum and

Expertsmind.com offers  Cell Arrays matlab assignment help In matlab, Cell arrays are just like frequent arrays in that they are "indexed" details of information, with an out

CYLINDRICAL COORDINATE