Introduction Job & Oral: Gas Turbine Engine Sections.

How are engine flanges identified?

Engine flanges are identified alphabetically going from the front of the engine to the rear.

Where| on what is the Allison-250 engine used?

The Allison-250 engine is widely used on helicopter engines.

What are two ways that positions and locations in the circumference of a gas turbine engine may be given?

The G.T.E. may be given clock position or degrees of a circle.

Why do the accessory have to be mounted on the accessory gearbox?

The accessories have to be mounted on the accessory gearbox to turn in order to perform their function.

How are multiple features (like fuel nozzles & flange bolts) that go around the circumference of a turbine engine numbered?

The circumference of a turbine engine are numbered clockwise from the rear number 1 at the top or 12'0 clock position.

What is an engine flange?

The engine flange is a projecting rim when the different engine sections are bolted together.

What is the function of the engine's air entrance/ air inlet?

The function of the engine air entrance is to conduct incoming air to the compressor with a minimum energy loss resulting from drag or ram pressure air.

What is the function of the Turbine section on a gas turbine engine?

The primary function of the Turbine section is to transform a portion of the kinetic energy of the exhaust gases into mechanical energy to drive the gas generator compressor and accessories.

What is the primary function of the accessory section?

The primary function of the accessory section is to provide space for the mounting of accessory for operation and control of the engine.

What is the primary function if the combustion section a Gas Turbine Engine?

The primary function of the combustion section is to burn the fuel/air mixture, adding heat energy to the air.

What is the primary function of the compressor on a Gas Turbine Engine?

The primary function of the compressor on a Gas Turbine Engine is to supply air in sufficient quantity to satisfy the requirements of the combustion burners.

What is the primary function of the exhaust section on a G.T.E. ?

The primary function of the exhaust section is to direct the flow of hot gases rearward in such a manner as to prevent turbulence and at the same time, impact a high final or exit velocity to the gases.

You are an air drop. Name the six engine sections, in sequence, that you will flow through in a typical Gas Turbine Engine.

The six engine sections are the Inlet, Compressor, Diffuser, Combustion, Turbine and Exhaust.

On a gas turbine engine, what is the standard reference point from which all positions (left or right) and directions (clockwise or counterclockwise) are determined?

The standard reference point is determined by viewing the gas turbine engine from the rear looking forward.

Name two accessories that are mounted on the gearbox.

Two accessories that are mounted to the gearbox is a generator and hydraulic pump.