Gas Turbine Engine Brayton Cycle and Application.pptx

Brayton Cycle in GTE

1. GAS TURBINE ENGINE MODULE 15.1 FUNDAMENTALS Issue: 01 Revision: 00 Module 15.1 1

2. Issue: 01 Revision: 00 Module 15.1.1 Page No: 2 Brayton Cycle -ENERGY TRANSFORMATION Gas Turbine Engine is a HEAT ENGINE  CHEMICAL ENERGY OF FUELHEAT ENERGY(INCREASE GAS PRESSURE)KINETIC ENERGY(HIGH VELOCITY STREAM OF AIR) MECHANICAL ENERGY(EXPANDING GASES ROTATE A SERIES OF TURBINE WHEEL THAT DRIVES A COMPRESSOR AND ACCESSORIES

3. Issue: 01 Revision: 00 Module 15.1.1 Page No: 3 ENERGY TRANSFORMATION CYCLE BRAYTON CYCLE or CONSTANT PRESSURE CYCLE The reason for this is that in the gas turbine engine, pressure is fairly constant across the combustion section as volume and gas velocities increase. SIMILAR TO 4 STROKE CYCLE - INTAKE - COMPRESSION - COMBUSTION - EXHAUST

4. Issue: 01 Revision: 00 Module 15.1.1 Page No: 4 ENERGY TRANSFORMATION CYCLE TAKEN AIR COMPRESSED IN COMPRESSOR MIXED WITH FUEL AND IGNITED EXHAUSTED THROUGH TURBINE  EXHAUST NOZZLE. PERFORM SAME FUNCTION AS PISTON ENGINE

5. Issue: 01 Revision: 00 Module 15.1.1 Page No: 5 ENERGY TRANSFORMATION CYCLE con’d Continuous intake event by drawing ambient air through inlet duct to first stage compressor Each compressor stage then compresses the air to increase the static air pressure. In the combustor, fuel is sprayed into incoming air and ignited, resulting in continuous combustion. The resulting release of heat energy increases air volume while maintaining a relatively constant pressure. When hot gases leaves the combustion chamber, it passes through the turbine where the static air pressure drops and air volumes increases (Since there is minimal resistance the air gas velocity increases dramatically)

6. Brayton Cycle Issue: 01 Revision: 00 Module 15.1.1 Page No: 6 Point A. Condition of air before it enter compressor. Once in the compressor, pressure increases and volume decreases. Point B . Pressure and volume of air as it leaves the compressor Point C . Heat energy is added to air mass causing air to expand with little or no change in pressure Point D . Once heated, air expands and losses pressure as it flows through the turbine section