Duct with flow control-aircraft maintenance, Other Engineering

Duct With Flow Control-Aircraft maintenance:


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

A 3.6-cm inside diameter stainless steel pipe is being used to convey a liquid food. The inside convective heat-transfer coefficient is 10 J/s.m2. o C. The pipe is 0.5 cm thick and

In this assignment you are asked to demonstrate your understanding of both exploratory and statistical inference techniques described in class to investigate how the currency marke

Hp air for aircraft services: A number of aircraft accessories produce sufficient heat in normal use to require a cooling system to prevent overheating. A good example is the

Design Features of Supercritical Aerofoil • Blunt nose- rapid p pressure reduction around leading edge • Flat top- Reduce the flow acceleration on upper surface toreduc

Outcomes of the FRA: When interpreting the outcomes of the FRA, NFPA 551 states that there are two ways in which the situation can be assessed to determine if it is acceptable

Company: British Sky Broadcasting Topic: You are a security analyst in a large investment house and must write a report on a real stock of your choice, giving a buy, hold or sell r

what are clippers