Exhaust Flashcards
What is the purpose of the exhaust cone?
To guide and speed up the airflow
What must happen to the airflow in the exhaust nozzle?
It must have its speed limited to prevent choking.
What type of noise is generated by large turbulent exhaust flow?
Low frequency noise
Why is compressor noise less than turbine on a fan engine?
The compressor is fitted with noise absorbent layers
What is the purpose of the common nozzle?
To mix the gas flows of the exhaust to avoid choking
What other components can be used to increase propulsive efficiency and what is its disadvantage?
Gas mixer
Add weight to the engines.
Engine noise is expressed in?
Effected perceived decibels
What is used in airflow lining to reduce noise and how is it achieved?
It is used to reduce the transmission of noise through a porous surface supported by a honeycomb structure.
