a c engines and jet propulsion 1

8/3/2019 A C Engines and Jet Propulsion 1

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Subject: A/C Engines and Jet Propulsion :Weekly Hours : Theoretical :2 Units : 5 :5 :2:

Tutorial : 1 :1Experimental : 1 :1

Week Contents 1 Classification of propulsion

systems - The thrust equation 1

2 Engine performance and A/Crange

2

3 Turbo jet engine 34 Turbo fan engine turbo fan 45 Turbo prop engine turbo prop 56 Ram-jet , Pulse-jet engines 67 Subsonic inlets 78 Supersonic inlets 89 Types of supersonic inlets 910 Euler pump and turbine equation 1011 Centrifugal flow compressors

Construction 11

12 Centrifugal flow compressors Basic theory

12

13 Axial flow compressors Construction

13

14 Axial flow compressors Bladeterminology

14

15 Axial flow compressors Velocitytriangles

15

16 Axial flow compressors Basictheory

16

17 Development of combustor 1718 The combustion process 18

19 Types and components ofcombustors 19

20 Fuel injectors 2021 Theory of after burners 2122 Radial flow turbines Types and

construction 22

23 Radial flow turbines Basic theory 2324 Axial flow turbines Types and

construction 24

25 Axial flow turbines Basic theory 2526 Axial flow turbines Blade cooling 2627 Theory of nozzles expansion 2728 Types of nozzles 28

29 Thrust reversers 2930 Noise suppressors 30


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CLASIFICATION OF AEROENGINES

Aircraft power plants (engines) are internal combustion engines and are

of two types:

or intermittent combustion enginespiston engines:eType on

or continuous combustion enginesair breathing engines:Type two

Type two can be subdivided into engines:

:which includegas generatorWithout-

* Athodyd (Aero thermodynamic ducts) which includes:

TheRam jets, and

The Pulsejets.

* Rockets which could be:

Solid fuel, or

Liquid fuel.

:which includesWith gas generator-

* Turbojet engines that can be of:

Single spool, or

Double spool.

* Bypass engines that can have:

Front fan, or

After fan.

* Turbo shaft engines that can be:

Helicopterengine, or

Turbo propellerengine.


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CLASIFICATION OF AEROENGINES

Aircraft power plants (engines) are internal combustion engines and are

of two types:

or intermittent combustion enginespiston engines:eType on

or continuous combustion enginesair breathing engines:Type two

Type two can be subdivided into engines:

:which includegas generatorWithout-

* Athodyd (Aero thermodynamic ducts) which includes:

TheRam jets, and

The Pulsejets.

* Rockets which could be:

Solid fuel, or

Liquid fuel.

:which includesWith gas generator-

* Turbojet engines that can be of:

Single spool, or

Double spool.

* Bypass engines that can have:

Front fan, or

After fan.

* Turbo shaft engines that can be:

Helicopterengine, or

Turbo propellerengine.


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Definitions

This includes the evaluation of the:Engine Performance:2.3.2following parameters.

Propulsive efficiency: is the ratio of thrust power (TU) to the rate of

production of propellant kinetic energy.

Thermal efficiency: is the ratio of rate of addition of kinetic energy to

the propellant to the total energy consumption.

Propeller efficiency: is the ratio of thrust power to the shaft power.

Overall efficiency: is the product of propulsive efficiency by the thermal

efficiency.

A/C range

Specific fuel consumption (SFC): is the ratio of mass of fuel consumed

to the thrust produced (TSFC). Or the ratio of mass of fuel consumed to

the shaft power (BSFC). Or the ratio of mass of fuel consumed to the

equivalent shaft power (EBSFC).

2.3: Examples


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a c engines and jet propulsion 1

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