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19 Cards in this Set
- Front
- Back
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What are the major components of a typical gas turbine? |
Air inlet, compression, combustion, turbine, exhaust and accessory section |
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What are the four combustion chamber systems? |
Centrifugal and axial flow |
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What are the four combustion chamber system? |
Can,annular,can-annular, reverse flow annular |
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What is the purpose of the interconnector tubes between can type combustion chamber? |
Spread the flame to the combustion chamber that are not equipped with igniter plugs during starting |
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What prevents burning of the liner walls in a can type combustion chamber? |
Louvers that direct cool air along the inside of the wall |
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What types of damage may be found when inspecting compressor blades? |
Dents, scratches, gouges, gallin, burns, burrs, pitting and cracks |
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What is the location and fuction of the diffuser section in a turbine engine? |
To change high velocity compressor discharge air to static air |
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Where are stress rupture cracks most likely to occur on a turbine blades? |
Across the leading or trailing edge of the blade |
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How are compressor blades attached to a disk-type rotor?what |
By bulb type, fir tree or dove tail |
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What is the purpose of the nozzle diaphragm, or turbine nozzle? |
Prepares the mass airflow to drive the turbine rotor and deflect gases so they strike the turbine at a good angle |
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What is the major difference between turboprop and turbojet engines? |
Turboprop has more turbine stages than turbojet engine. |
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What is a turbo fan engine? |
Kind the same of a turboprop but instead of the prop it have a duct enclosed axial flow fan |
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What is the effect of air density on the thrust of a turbine engine? |
If density increases thrust increase and vice versa |
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What are the two most common types of thrust reverse?what |
Mechanical and aerodynamic blokage |
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What is a split compressor system in a turbine engine? |
Two concentric shafts joining the turbines stages to their respective compressor |
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What is one method of relieving thermal stress on a turbine disk? |
Direct cool bleed air to the face of the disk |
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What may be the indications if a turbojet engine is out of trim? |
High exhaust gas temp (EGT) |
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What is a free turbine? |
A turbine wheel that rather than driving the compressor rotor, drives a prop or helicopter blades |
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What is the main purpose of thrust reverser? |
Slow thr aircraft down for effective braking. |
