Term
| What force results from the gas exiting an exhaust nozzle? |
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Definition
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Term
| how can a rocket operate in space |
|
Definition
| they carry their own fuel and oxygen source |
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Term
| what are the names of the sections of the gas generator? |
|
Definition
1)Compressor
2)Combustor
3)Turbine |
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Term
| what is standard day barometric pressure? |
|
Definition
| 14.7 PSI or 19.92" of mercury (Hg) |
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Term
| when is the starter disengaged? |
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Definition
| WHEN THE ENGINE HAS REACHED SELF ACCELERATING SPEED |
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Term
| what is the start sequence? |
|
Definition
1) turn on starter
2) turn on ignition
3) add fuel |
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|
Term
| what is the most important thing to monitor when starting a GTE? |
|
Definition
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|
Term
| What does Bernoullis principle state |
|
Definition
| the energy of a fluid or gas in motion is constant. velocity increases as pressure decreases |
|
|
Term
| what happens to pressure and velocity in a convergent duct? |
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Definition
| velocity increases and pressure decreases |
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|
Term
| what is the shape of the inlet duct on a supersonic a/c |
|
Definition
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|
Term
| compression ratio is a function of what in GTE? |
|
Definition
| the function of the # of stages |
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|
Term
| what is a disadvantage of the centrifugal flow compressor? |
|
Definition
| a high pressure rise per stage |
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|
Term
| what is the function fo the diffuser in a centrifugal flow compressor |
|
Definition
| to decrease velocity and increase pressure |
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|
Term
| what are the two types of fuel nozzles? |
|
Definition
suplex- 1 seperate spray pattern
duplex- 2 seperate spray patterns |
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Term
| when does the pressurization valve open in a duplex nozzle? |
|
Definition
| when engine is above idle speed |
|
|
Term
| when does the dump valve open in the P&D valve? |
|
Definition
| opens w/ engine shutdown and drains fuel |
|
|
Term
| Components of a GTE's ignition system |
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Definition
| 2 high tension leads, 2 low tension leads, 2 exciter boxes, 2 igniter plugs |
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|
Term
| what type of ignition system is usually used on GTE? |
|
Definition
|
|
Term
| when is a GTE's ignition system turned off? |
|
Definition
| when the engine reaches idle speed |
|
|
Term
| what are the functions of the shrouded tip blades? |
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Definition
| they reduce vibration and keeps gas from flowing between blade tips and outer turbine tips |
|
|
Term
| 3 types of turbine blades |
|
Definition
impulse
impulse reaction
reaction |
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|
Term
| where is the highest heat to metal contact in a GTE? |
|
Definition
| first stage nozzle guide vanes |
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