PRELIM TURBINE ENGINES

These flashcards cover essential vocabulary related to gas turbine engines, their operation, design, and components.

Jet Propulsion

A method that propels an aircraft forward by expelling high-speed exhaust gases backward, in accordance with Newton's third law.

Centrifugal-Type Turbomachine

A machine that uses centrifugal force to increase pressure or flow of air or fluid by spinning.

Turbojet Engine

A type of gas turbine engine that produces thrust mainly through high-velocity exhaust gases expelled from the engine.

Turboprop Engine

A gas turbine engine that drives a propeller, used primarily in regional and commuter aircraft.

Turboshaft Engine

A gas turbine engine that provides shaft power, commonly used in helicopters and other applications requiring rotational energy.

Turbofan Engine

A type of gas turbine engine that uses a ducted fan to produce thrust from both the fan airflow and jet exhaust.

Engine Pressure Ratio (EPR)

The ratio of turbine discharge pressure to engine inlet air pressure, indicating engine performance.

Compressor

A component of the engine that increases the pressure of incoming air before it enters the combustion chamber.

Combustion Chamber

The section of the engine where fuel is mixed with high-pressure air and ignited to produce hot gases.

Turbine Section

The part of the engine that extracts energy from high-temperature gases to drive the compressor and other accessories.

Air Inlet

A section of the engine that directs outside air into the engine smoothly and efficiently.

Afterburner

A component that injects additional fuel into the exhaust stream to increase thrust, especially in turbojet engines.

Fan Pressure Ratio

The ratio of air pressure leaving the fan to the air pressure entering the fan, indicating compressor efficiency.

Flameout

A condition where the combustion flame is extinguished inside the combustion chamber, resulting in loss of engine power.

Thrust Reversers

Devices that redirect the exhaust flow forward to help slow down an aircraft after landing.

Bleed Air

High-pressure air taken from the compressor section of the engine, used for various auxiliary systems and functions.

Impulse Turbine Blades

Turbine blades in which the total pressure drop occurs in the fixed nozzle guide vanes.

Reaction Turbine Blades

Blades that produce turning force based on aerodynamic lift, utilizing pressure differences created by the airflow.