Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
48 Cards in this Set
- Front
- Back
|
The exhaust nozzle of a Thrust producer converts what type of energy into what type of energy |
Potential energy into kinetic energy |
|
|
Where does the afterburner receive the oxygen rich are it needs to operate |
75% of the secondary air |
|
|
Which type of thrust reverser would have a component called blocker doors |
Used in conjunction with aerodynamic thrust reverser |
|
|
What is mixed exhaust pertaining to exhaust systems of turbine engines |
Hot core air and cold fan air exit from common nozzle |
|
|
What is unmixed exhaust pertaining to exhaust systems in a turbine engine |
Hot and cold air exit from different nozzles |
|
|
Can engine compressor bleed air be used to operate a Thrust reverser system |
Yes |
|
|
The jet nozzle is in what section of the turbine engine |
Exhaust section |
|
|
What is the purpose of the thrust reverser |
Must slow the aircraft down quickly and safety under all conditions |
|
|
What component is the exit nozzle attached to |
It is attached to the case |
|
|
Subsonic area that has velocity going up and pressure going down is going through what shape duct |
Convergent duct |
|
|
What is the alternate name for the mechanical blockage in aerodynamic thrust reverser system |
Mechanical is clamshell or hot stream spoiler aerodynamic is Cascade or cold stream spoiler |
|
|
What is the purpose of the exhaust system on a turbo fan |
Direct the exhaust gases clear of the airframe |
|
|
The cone in the exhaust duct ( the case, struts and cone) causes the exhaust duct to be what shape |
Divergent |
|
|
How much less fuel did the unducted fan use compared to the equivalent turbofan |
40% |
|
|
What is the function of the struts in the exhaust system |
Assist in straightening the gas flow |
|
|
What makes son unmixedexhaust different from mixed exhaust |
Hot and cold exit from the nozzles |
|
|
Most of the noise that is created by a turbine engine comes from what effect |
Interaction of the hot, high velocity exhaust gases with the relatives still cold ambient air |
|
|
What are the two types of turbine engines that use afterburners |
Turbojet and turbofan |
|
|
Concerning the noise signature of an engine what is the quietest turbine engine |
Turboprop |
|
|
Where are the controls for reverse thrust usually located |
The thrust lever is located in the center console of the cockpit |
|
|
A fixed Divergent exhaust nozzle will most likely be used on what type of aircraft |
Rotary Wing aircraft |
|
|
A fixed Divergent convergent exhaust systems improves what for a low bypass turbofan |
Improves Cruise fuel economy & thrust |
|
|
The use of hot streamer (mechanical) and cold streamer (aerodynamic) on the same engine at the same time could be used by what classification of engine |
High bypass turbofan |
|
|
If an aircraft switches into after burning, but the exhaust nozzle stays in the convergent configuration what happens |
This will cause air to stack up which will make the air pressure increase and velocity decrease this will cause thrust decrease |
|
|
What is power back |
Backing up aircraft on the ground |
|
|
What are the three methods for powering the thrust reverser system on a turbine engine |
Electrical motor and Jack screw, hydraulic, pneumatic |
|
|
Are Engineers more concerned with high frequency noise or low frequency noise |
Low frequency noise |
|
|
Corrugated tube type mixers did what to reduce the noise emanating from an exhaust system of a turbine engine |
Exchange low frequency noise for high frequency noise and more quickly mix air flow |
|
|
The cone will be located after what component |
Immediately aft of the last turbine section |
|
|
What component of an aerodynamic thrust reverser system is redirects the are 45° forward |
Cascade vanes |
|
|
What type of exhaust nozzle will be used on most commercial aircraft |
Fixed convergent nozzle |
|
|
What increases the air density when using water injections on a turbine engine |
The water evaporating |
|
|
How much efficiency did using counter-rotating propellers at to unducted fans |
6% to 8% |
|
|
Does using reverse thrusters provide more or less thrust than the engine in the normal configuration |
Less |
|
|
What component in the exhaust system ensures proper pressure and smooth delivery of the exhaust gases to the exhaust nozzle |
Exhaust cone |
|
|
When will the use of a variable geometry nozzle be required |
With an aircraft during supersonic flight |
|
|
What does supersonic air flow through or Divergent duct do to Velocity and pressure |
Velocity goes up pressure goes down |
|
|
How the power being produced is used will determine what about the exhaust system |
The type of exhaust |
|
|
What is V2 |
Total thrust |
|
|
A 10 to 30% power gain is achieved on a turbine engine when using what system |
Water injections |
|
|
Who makes the cone in the nozzle of an exhaust system |
Airframe manufacturers |
|
|
At what decibel level is hearing protection required |
100 decibels |
|
|
Which gas turbine engine is considered the loudest |
Turbo jet |
|
|
Why is there more of a concern over low frequency noise emitted from a turbine engine |
It travels further, perceiving to be the loudest, can be heard and felt |
|
|
Any turbine engine you could use a variable geometry nozzle. Why do commercial aircraft engines not use variable geometry nozzles |
Heavy and expensive |
|
|
Thrust reversers are more effective than breaks because |
Saves weight on brakes, brakes will have to be massive, effective on wet or icy runways and do not rely on friction |
|
|
Unmixed exhaust is, on what type of engine |
High bypass turbofan |
|
|
Blocker doors deflect are at what angle |
90% perpendicular to the axis of rotation |
