rajlakshmi engineering college

60 slides
3.89 MB
775 views

Similar Presentations

Presentation Transcript

1

UNIT-1FUNDAMENTALS OF GAS TURBINE ENGINES

2

INTRODUCTIONComprehend the thermodynamic processes occurring in a gas turbine Comprehend the basic components of gas turbine engines and their basic operation Comprehend the support systems associated with gas turbine engines

3

ADVANTAGES OF GTE’sWeight reduction of 70% Simplicity Reduced manning requirements Quicker response time Faster Acceleration/deceleration Modular replacement Less vibrations More economical

4

DISADVANTAGES OF GTE’sMany parts under high stress High pitched noise Needs large quantities of air Large quantities of hot exhaust (target) Cannot be repaired in place

5
6
7
8
9
10
11
12
13

BRAYTON CYCLEUnlike diesels, operate on STEADY-FLOW cycle Open cycle, unheated engine 1-2: Compression 2-3: Combustion 3-4: Expansion through Turbine and Exhaust Nozzle (4-1: Atmospheric Pressure)

14

BASIC COMPONENTS

15

NUMBERING OF TURBINE ENGINESintake compressor burner turbine afterburner (AB) nozzle (n)(diffuser)(e.g., turbofan)

16

COMPRESSORSupplies high pressure air for combustion process Compressor types Radial/centrifugal flow compressor Axial flow compressor

17
18

COMPRESSORRadial/centrifugal flow Adv: simple design, good for low compression ratios (5:1) Disadv: Difficult to stage, less efficient Axial flow Good for high compression ratios (20:1) Most commonly used

19

THE THRUST EQUATION

20
21
22

FACTORS AFFECTING THRUSTPRESSURE TEMPERATURE DENSITY HUMIDITY ALTITUDE FORWARD VELOCITY

23

METHODS OF THRUST AUGMENTATIONAFTER BURNING INJECTION OF WATER & ALCOHOL MIXTURE BLEED BURN CYCLE

24
25

UNIT-IISUBSONIC & SUPERSONIC INLETS FOR JET ENGINES

26

INTRODUCTIONInlets are very important to the overall jet engine performance & will greatly influence jet engine thrust output. The faster the airplane goes the more critical the inlet duct design becomes. Engine thrust will be high only if the inlet duct supplies the engine with the required airflow at the highest possible pressure.

Browse More Presentations

Last Updated: 8th March 2018

Recommended PPTs