Turbine engines

5. How many igniters are there normally in an aircraft turbine engine?

2

8. Why do some axial flow turbine engines have more than one set of turbines and compressors?

82 spool turbine engine has a low pressure and a high-pressure compressor, each driven by its own turbine. The two independent systems operate at the speed at which they are most efficient

15. What is meant by creep of a turbine blade?

A condition of permanent elongation of the turbine blades. Creep is caused by the high temperatures in the high centrifuge go loading imposed on the blades

13. What is meant by a hung start in a turbine engine?

A star in which ignition occurs, but the engine does not accelerate to a self-sustaining speed

14. What is meant by a hot start in a turbine engine?

A start and which ignition occurs, but the internal temperatures go so high enough they can damage the engine

7. What is meant by a free turbine turboshaft engine?

A turboshaft engine that has a turbine wheel, or stage of turbine wheels, that it is not used to drive the compressor of the gas generator section over the engine. This free turbine drives the propeller in a turboprop engine or the transmission and rotor of a helicopter

21. What is meant by Trimming a turbo jet engine?

Adjusting the fuel control to get correct idling and maximum thrust RPM

10. What is meant by a Turbofan engine?

And an axial flow turbine engine in which the first stage of compressor blades are lengthened, so they can force air around the outside of the gas generator portion of the engine

9. What kind of bearings are used to support the rotor shaft of an aircraft turbine engine?

Anti-friction bearings, Such as ball bearings or roller bearings

18. At what point in a turbine engine is the temperature at highest

At the inlet to the high-pressure turban

2. What are the two basic types of compressors that are used in aircraft turbine engines?

Axial flow and centrifugal

4. What are three types of combusters used on an aircraft turbine engines?

Can-type, annular-type, can-annular-type

16. How is the compressor of a turbine engine cleaned?

Emulsion-type cleaner; at low speeds followed by a clean water rents more aggressive cleaning done by abrasive such as ground up apricot pits or walnut shells

12. Why is it important that a turbine jet engine be allowed to cool before is shut down after it has been operating at high-power said?

If the engine is shut down while it is hot? There is a possibility that the shroud will contact around the turbine wheel and seize the rotor

11. Where can you find the limits of repair allowed for the compressor blades of an aircraft turbine engine?

In the FAa approved service manual used by the manufacture of the engine

17. Where is water injected into a turbine engine for cooling purposes?

Into the compressor inlet and into the engine diffuser case

1. What are the two basic sections of a turbine engine?

The hot section and the cold section

20. What are two types of thrust reverser's that are used on turbojet engines?

The mechanical blockage type and the aerodynamic blockage type

3. What is the purpose of the stators in an axial flow compressor?

The stators convert some velocity energy into pressure energy and change the direction of the air so it is proper for the next stage of rotors

6. What is the main purpose of the turbine nozzle in an aircraft turbine engine?

The turbine nozzle directs the hot gases as they leave the come bursters so they will turn the turbine wheel with maximum efficiency

19. What is the function of the interconnect tubes between the cans of a turbine engine that uses can type combustors?

These tubes allow the flame to travel from the cans that contain the igniters to all of the other cans when the engine is being started