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Jet Propuslion Flashcards

1
Q

Jet Propulsion refers to that action which is produced by the ejection of

A

Air, another gas, or liquid

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2
Q

Newtons Third Law

A

For every action there is a reaction

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3
Q

Jet Engine Operation requires what?

A

Force to over come drag

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4
Q

A jet engine develops thrust by

A

Burning a combustible fuel mixture and changing the energy of the expanding gases into a propulsive force.

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5
Q

What is the four cycle process of a a jet engine

A

Intake, Compression, Combustion & Exhaust

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6
Q

Name the sections of a jet engine

A

Air Inlet, Compressor, Diffuser, combustion, turbine, exhaust, accessory

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7
Q

What is the purpose of the Air Inlet Section?

A

Designed to channel incoming air into the compressor

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8
Q

What recovers as much total pressure as possible and delivers it to the front of the engine?

A

Air Inlet Section

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9
Q

What are the three types of jet engines

A

Turbojet, Turbofan, Turboprop

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10
Q

What section delivers air to the compressor inlet with a minimum of turbulence and pressure variation

A

Air Inlet Section

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11
Q

What jet engine section is made up of pair of rotors and stators?

A

Compressor Section

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12
Q

What is the primary function of the Compressor Section?

A

To supply air in sufficient quantity to produce the required engine thrust.

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13
Q

What is made of blades fixed on a spindle

A

Rotor

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14
Q

What turns at high speed, takes air at the compressor inlet and impels it through a series of stages

A

Rotor

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15
Q

The rotating rotor action….

A

Compresses the air at each stage and accelerates it rearward.

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16
Q

What section of the compressor consists of stationary blades fixed withing the engine that acts as a diffuser at each stage of the compressor partially converting high velocity to pressure?

A

Stators

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17
Q

What consists of a consecutive pair of rotor and stator blades?

A

Compressor Stage

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18
Q

Slows down and evenly spreads out the compressors discharge air for combustion.

A

Diffuser Section

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19
Q

Combustion Section consists of

A

Burner Cans, Igniter Plugs and Fuel Nozzles

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20
Q

What section of the jet engine raises the temperature of the air passing through the engine and directs the super-heated air to the turbine?

A

Combustion Section

21
Q

What section transforms part of the exhaust gas energy into mechanical energy to drive the compressor and accessory gearbox?

A

Turbine Section

22
Q

The turbine section absorbs ___ to ____ percent of the total pressure energy from combustion exhaust gas?

A

60 to 80 percent

23
Q

The Turbine Section consists of ____ and _____ the same as the compressor section

A

Rotors and Stators

24
Q

What is another name for Turbine Guide Vanes?

A

Stators (Turbine)

25
What is another name for the "Turbine Wheel?"
Rotor (Turbine)
26
Stators (turbine guide vanes) discharge gas at extremely high speed directly onto the ________
Rotor Assembly
27
What part of the the turbine section experiences severe centrifugal loads and extreme high temperatures?
Rotor (Turbine wheel)
28
What is the combination of the compressor and turbine rotors on a common shaft?
Engine Rotor Assembly
29
What directs the flow of hot gases leaving the turbine section?
Exhaust Section
30
Provides space for accessories necessary for operation and control of the engine.
Accessory Section
31
The accessory sections consists of the following...
Electric generator, hydraulic, oil and fuel pumps.
32
What type of jet engine is a straight gas turbine engine that gets its thrust by accelerating a mass of air through the engine?
Turbojet
33
What is the advantage of a turbojet engine?
Best at high speeds for high speed aircraft like fighters.
34
What are the two disadvantages of a turbojet engine?
1. Cannot produce high thrust at low altitudes and low airspeed. 2. Need long runways and have poor climb out capabilities (poor rate of climb)
35
What type of engine combines the thrust developed by the propeller and the thrust produced by the exhaust gases at the exhaust nozzle?
Turboprop
36
What are the sections of the turboprop engine?
Prop, gearbox, shaft, compressor, combustion chamber, turbine, exhaust
37
____ percent of the power produced converts to shaft horsepower driving the propeller reduction gears and accessories of a turboprop engine?
90%
38
A turboprop produces ____ percent of thrust as the gases exit out of the exhaust nozzle.
10%
39
What are the advantages of a turboprop engine?
1. Develops high thrust at low altitudes | 2. Ideal for lifting heavy loads off short runways and medium length runways.
40
What is a disadvantage of the turboprop engine?
Propeller efficiency drops off as airspeed and altitude increase.
41
What transmits power from the engine to the reduction gear assembly in a turboprop engine?
Extension Shaft Assembly
42
What section of the turboprop engine engine reduces the high speed of the turbine engine to a suitable propeller speed
Reduction Gear Assembly
43
The rear case of the Reduction Gear Assembly can be used for mounting what engine accessories on a turboprop engine?
1. AC Generator 2. Hydraulic Pump 3. Tachometer 4. Oil pump 5. Pneumatic starter
44
What type of jet engine has an axial fan enclosed in the engine case instead of a geared propeller?
Turbofans
45
Turbofan engines produce between _____ and ____ percent of total thrust.
30 and 85 percent
46
What type of jet engine combines the good operating efficiency and high thrust capability of the turboprop with the high speed, high altitude capability of the turbojet?
Turbofan
47
What are the advantages of a turbofan engine?
1. more efficient cruise trust and lower fuel consumption than a turbojet 2. Less weight, increased ground clearance, higher altitudes, more economical 3. Less noise at higher thrust settings
48
What jet engine type is most ideal power plant for all large conventional military aircraft?
Turbofan
49
What is the disadvantage to the Turbofan engine?
No Major advantages.

SMA (30 decks)

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