Changes in temperature and pressure-aircraft maintenance, Other Engineering

Assignment Help:

Changes in temperature and pressure:

The changes in temperature and pressure of the gases through a gas turbine engine are illustrated in Figure 1.5 The efficiency with which these changes are made will determine to what extent the desired relations between pressure, temperature and velocity are obtained.  The more efficient the compressor, the higher is the pressure generated for a given work input - i.e. for a given temperature rise of the gas.  Conversely, the more efficiently the turbine uses the expanding gas, the greater is the output of work for a given temperature drop in gas.

 

1494_changes in temprature and pressure.png

VELOCITY AND PRESSURE

During the passage of the air (gas) through the engine, aerodynamic and energy requirements demand changes in its velocity and pressure. For example, during compression a rise in the pressure of the air is required with no increase in its velocity. After the air has been heated and its internal energy increased by combustion, an increase in the velocity of the gases is necessary to cause the turbine to rotate. Also at the propelling nozzle, a high velocity is required, for it is the change in momentum of the air that provides the thrust on the aircraft. Local decelerations of gas flow are also required - for example, in the combustion chambers to provide a low velocity zone for the flame.


Related Discussions:- Changes in temperature and pressure-aircraft maintenance

Propeller control in aircraft engine, Propeller control : CONSTANT SPE...

Propeller control : CONSTANT SPEED UNIT: In the normal flight range, the main control of the propeller is exercised by the propeller control unit (PCU). MANUAL AND AU

Hydro plant, various components used in plants

various components used in plants

Calculate the maximum amount of recoverable resource, A 30m deep quarry pit...

A 30m deep quarry pit is to be constructed in a jointed basalt rock mass. The quarry management wants to maximise the side wall inclination to 70° for economic reasons. The geologi

Bragg''s law and calculation of wavelength, Q.   Explain Bragg's law. A mon...

Q.   Explain Bragg's law. A monochromatic X-ray is incident on a crystal. By rotation the crystal, two successive reflections are obtained at angles of 10.0° and 23.0°. the inter p

Thrust reversal - aircraft design, Thrust reversal: Thrust reversal is ...

Thrust reversal: Thrust reversal is a means of reducing the landing run of an aircraft without excessive use of wheel brakes or the use of braking parachutes.  On a propeller d

Avionic systems design- stability derivatives, The idea of stability deriva...

The idea of stability derivatives is to approximate the general functional relationship between any force ormoment variable and the dynamic or control variables as a Taylor series

Double cantilever beam, Double Cantilever Beam In the double cantilever...

Double Cantilever Beam In the double cantilever configuration, the ends of the sample are pulled apart, forcing a crack to propagate down the beam from one end. The figure belo

Switching, name the switching schemes used in a digital exchange. how call ...

name the switching schemes used in a digital exchange. how call processing takes place?

Fuels and lubrication technology, minimum mass of air required for complet...

minimum mass of air required for complete combustionof the HFO

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd