Types of Turbine Engines

These flashcards cover key concepts related to types of turbine engines, their operation, and distinctions between different engine types.

What is the primary function of a propulsion system in aviation?

To produce thrust to push an object forward.

What principle explains how thrust is generated in a jet engine?

Newton's third law of action and reaction.

How do jet engines and rocket engines differ?

Jet engines are air-dependent, while rocket engines are air-independent.

What are the four basic operations of a gas turbine engine?

Intake, compression, power, and exhaust.

What component of a turbine engine compresses the intake air?

The compressor.

What role does the combustor play in a gas turbine engine?

It mixes compressed air with high-pressure fuel for combustion.

What is the outcome of the combustion process in a turbine engine?

The production of heat and pressure.

What is the core of a gas turbine engine composed of?

An inlet, a compressor section, combustion section, a turbine section, and an exhaust nozzle.

What is the main purpose of the turbine in a turbojet engine?

To turn the compressor.

What distinguishes a turbofan engine from a turbojet engine?

A turbofan engine has a fan that generates thrust, whereas a turbojet primarily uses exhaust energy.

What does the bypass ratio indicate in a turbofan engine?

The ratio of airflow that bypasses the core to the airflow that goes through the core.

How does a turboprop engine produce thrust?

By using a propeller that extracts energy from the exhaust gases.

What is the difference between fixed-turbine and free-turbine engines?

Fixed-turbine engines have the added turbine mechanically connected to the core, while free-turbine engines do not.

What type of turbine engine delivers power through a shaft to operate other machinery?

Turboshaft engine.

What is a key advantage of turbofans regarding fuel energy conversion?

They convert more fuel energy into pressure, improving efficiency.

What is the typical thrust contribution of the propeller in a turboprop engine?

Approximately 85 percent of the total thrust.