Flashcards on Aircraft Engine Exhaust and Reverser Systems
Aircraft Engine Exhaust and Reverser Systems Explained
Tap to flip · Swipe to navigate
Aircraft Engine Exhaust Systems
13 cards
Card 1
Question: What material is used in most reciprocating engine exhaust components?
Answer: Corrosion-resistant steel.
Card 2
Question: How is the speed of a turbocharger controlled?
Answer: By controlling the amount of exhaust gas that flows through the turbine, via the position of the waste gate in the exhaust pipe.
Card 3
Question: What type of actuator is used to control the position of the turbocharger waste gate?
Answer: A hydraulic actuator that uses engine oil pressure to move the piston.
Card 4
Question: How does a power recovery turbine increase the power of a reciprocating engine?
Answer: Exhaust-driven velocity turbines are coupled through a hydraulic drive to the crankshaft, using energy that would normally be lost to assist turning t
Card 5
Question: How tight should the clamps be that hold sections of a reciprocating engine exhaust system together?
Answer: Not so tight that they will be damaged when heat expands the exhaust system components.
Card 6
Question: What would be the effect on engine performance of an internal failure of a muffler?
Answer: It will increase exhaust back pressure and cause a loss of engine power.
Card 7
Question: What is the purpose of an augmentor tube in the cooling system of a reciprocating engine?
Answer: To use the velocity of exhaust gases to produce low pressure on one side of the engine, helping pull cooling air through the cylinder fins.
Card 8
Question: What effect on turbine engine operation is caused by changing the exhaust nozzle?
Answer: Altering exhaust nozzle area affects compression ratio, RPM, mass airflow through the engine, and EGT.
Card 9
Question: Name two types of thrust reversers used with turbojet engines.
Answer: Mechanical blockage (clamshell) and aerodynamic blockage (cascade).
Card 10
Question: How does a noise suppressor reduce noise produced by a turbojet engine?
Answer: It breaks up low-frequency vibrations in the exhaust stream and converts them to higher frequencies that are more easily dissipated by air.