Day 7 Progress Check Flashcards
What is the purpose of “ram recovery” in the context of turbine engine inlets?
To compensate for losses caused by increases in aircraft speed
What is a common disadvantage of using compressor inlet screens?
Susceptibility to icing
What is the function of the straightening vanes or outlet vane assembly in an axial-flow compressor?
To eliminate turbulence in the discharge
In a single-spool axial-flow compressor, what drives the entire compressor?
High-pressure turbine
Why do many turboprop engines use screens in the inlet?
To prevent foreign object damage
In large turbofan engines with steel or titanium compressor blades, why are compressor inlet screens not generally used?
They improve ram recovery
They are commonly used
Correct: None of the above
They increase thrust
What type of compressor is limited to two stages due to efficiency concerns?
Centrifugal-flow compressor
Why are bellmouth inlets often used during engine testing in a test cell?
To measure intake temperature and pressure
Which type of compressor accelerates air outwardly to increase pressure?
Centrifugal-flow compressor
What is the function of the stator vanes in an axial-flow compressor?
To receive and increase the pressure of the air
What is the primary purpose of a turbine engine inlet?
To provide air to the compressor
In which situation is a variable-geometry inlet duct most commonly used?
Supersonic flight
In high-speed military aircraft, what type of inlet design is often used due to the pilot’s low position in the fuselage?
Divided-entrance duct
Which component is commonly used to straighten the airflow and direct it into the first stages of the compressor?
Inlet guide vanes (IGV)
What is a primary use of compressor bleed air in a gas turbine engine?
To pressurize the cabin
