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Turbine Engines > Turbine Engines > Flashcards

Turbine Engines Flashcards

1
Q

Pulsejet Air for Compressor

A

Check Valves

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2
Q

Purpose of Turbine in Gas Turbine Engine?

A

Turn Compressor

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3
Q

Main Advantage of Turbojet?

A

More Power + Fuel Efficient

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4
Q

Another name for Bypass Air?

A

Secondary Airflow

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5
Q

Most common gas turbine on corporate jets?

A

Medium Bypass

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6
Q

Another name for Free Turbine?

A

Power Turbine

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7
Q

Application of Turboshaft Engine?

A

APU/ Helicopter

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8
Q

If there are 2 compressors?

A

Double Spool

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9
Q

Relationship between Air Density and Thrust

A

Air Density is Directly Proportional to Thrust

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10
Q

Propulsive Efficiency?

A

Measure of effectiveness with which an engine converts kinetic energy into useful work

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11
Q

Gross Thrust

A

Total thrust produced without deduction of drag caused by momentum of incoming air

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12
Q

Newtons 1st Law?

A

Law of inertia

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13
Q

Newtons 2nd Law

A

Law of acceleration

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14
Q

Newtons 3rd Law

A

Every action has a equal and opposite reaction

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15
Q

Modular Engine Design?

A

Lower Maintenance Cost

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16
Q

Inlet duct design used on the Concorde

A

CD duct

17
Q

Why are Vortex generators used on inlets

A

Smooths the air

18
Q

Areas heated using Anti-Ice

A

Cowl
Inlet Guide Vanes
Nose Cone

19
Q

Primary purpose of compressor?

A

Increase static pressure and Decrease Velocity

20
Q

(single stage) Centrifugal Compressor Ratio?

A

10:1

21
Q

Purpose of Diffusor

A

Increase static pressure and Decrease Velocity prior to combustion

22
Q

Stage of axial flow compressors?

A

Rotors then Stators

23
Q

Function of compressor stator

A

Increase pressure and direct airflow into the next rotor

24
Q

Causes of compressor stall?

A

Turbulence
Quick Acceleration
Quick De-cceleration

25
Q

Compressor wash?

A

fluid and grit blast

26
Q

What did Frank Whittle Invent?

A

First Turbojet engine with a centrifugal impeller compressor

27
Q

What compressor type is a turbojet aircraft engine?

A

Centrifugal

28
Q

Another Name for Core Airflow?

A

Primary airflow

29
Q

What does pt7 stand for?

A

Total air pressure at station 7 ( Dynamic )

30
Q

What does a gearbox reduction do?

A

Keeps the tips subsonic
For prop efficiency
Powers the prop

31
Q

What does a free turbine do?

A

Gas gen. section and Power section separate
Reduce noise + blade erosion
Lower vibration
Power gear box

32
Q

Purpose of the Bellmouth inlet?

A

Helicopters and testing engines. Highest aerodynamic efficiency.

33
Q

3 types of Inlet designs?

A

Subsonic(private + commercial)
Supersonic(concord)
Bellmouth(helicopters + testing)

34
Q

Highest Potential Energy?

A

Diffuser

Turbine Engines (12 decks)

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