Reaction engines - aircraft maintance, Other Engineering

Assignment Help:

These can be divided into several categories.

Turbojet engines. The turbojet was the first type of jet engine developed. In this engine all the air passes through the core engine (i.e. the compressor, combustor and turbine). The engine may be single shaft as in the Avon engine, or twin shafted as in the Olympus 593 fitted to Concorde.

These engines are noisy and are not the most fuel efficient for normal use, however for high altitude high speed flight they are in a class of their own.

1054_reaction engine.png

b. Low and Medium By-pass or turbofan engines. These engines will have two or three shafts. The Low Pressure (LP) shaft drives a larger diameter compressor. Some of the air produced by-passes the core engine (hence the name) and is used to provide thrust. The core airflow provides power for the compressors and thrust. These engine are quieter than turbojets and more fuel efficient. The Spey and

Tay engines fall into this category.

1024_reaction engine2.png

The by-pass ratio is determined by the ratio of the air in flowing through the by-pass to the air passing through the core of the engine. Low by-pass less than 2:1, medium by-pass 2:1 to 4:1, high by pass greater than 5:1.
c. High by-pass turbofan engines. These engines have very large fans driven by a relatively small core engine. Often the fan is geared to run at a lower speed than the LP turbine, which gives the turbine mechanical advantage and also allows it to run at higher speed where it is more efficient. The ALF 502, RB211 and the Trent engines are all high by-pass
High by-pass engines are very fuel efficient, powerful and quiet. These engines have a very large diameter which does give drag problems, and are not suitable for high speed flight as the blade tips will suffer compressibility problems as they approach the speed of sound.

170_reaction engine1.png

 


Related Discussions:- Reaction engines - aircraft maintance

Metallurgy assignment, Hi I need someone to help me to do a metallurgy assi...

Hi I need someone to help me to do a metallurgy assignment

Engine fuel control systems - aircraft engine, Engine fuel control systems:...

Engine fuel control systems: The thrust of a turbo jet is controlled by varying the amount of fuel that is burnt in the combustion system and in order to operate the safe tempe

Nozzle area and shape control, Nozzle Area and Shape Control In a high ...

Nozzle Area and Shape Control In a high by-pass ratio engine with a single-stage fan without inlet guide vanes, the predominant sources governing the overall noise level are th

Totipotency, Why do only plant cell have totipotency?

Why do only plant cell have totipotency?

Re-heat nozzles in aircraft engine, Re-Heat Nozzles : If re-heat was fi...

Re-Heat Nozzles : If re-heat was fitted to an engine with a standard sized fixed area propelling nozzle, the expansion of gases caused by the use of re-heat would increase the

Logic gates - and gate, Logic gates - and gate: Figure shows the symbol...

Logic gates - and gate: Figure shows the symbol that represents 2 input AND gate together with its truth table. This gate will only adopt a 1 state at its output terminal when

Designing a phone, hi um how do people design phones and stuff like da

hi um how do people design phones and stuff like da

Net working capital, Net working capital In computing net cash flows in th...

Net working capital In computing net cash flows in the above example, we have assumed that all revenues are received in cash and all expenses are paid in cash. In reality, the act

Vehicle kinematics, x(t)=integration((Vx(t)+Vy(t))/2*cos(theta)dt) where Vx...

x(t)=integration((Vx(t)+Vy(t))/2*cos(theta)dt) where Vx, Vy and theta is a function of t I am getting problem with how to write it down in matlab in order to get the position x.

Guidance laws , The guidance law is used to generate a requirement (usually...

The guidance law is used to generate a requirement (usually an required acceleration) that will achieve the guidance objective. In this course, we will look at three main types

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