1.
15.7 EXHAUSTS
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2.
PURPOSE
• Safely dirext exhaust gases to atmosphere
• To produce required thrust
• Gas must be expanded completely and
discharge in laminar and axially oriented flow
• Material from nickel alloys or titanium subject
to high gas temperature.

3.
CONSTRUCTION
CONVERGENT SHAPE for subsonic

4.
BY PASS EXHAUST MIXER
LOW BY PASS RATIO HIGH BY PASS RATIO

5.
SUPERSONIC NOZZLE
• Divergent shape
• When nozzle is
choked, upstream
pressure increase
above atmospheric.
• Pressure different
provide pressure
thrust

6.
AFTERBURNER
Purposely to provide suddent thrust for fighter aircraft

7.
NOISE SUPPRESSION
• Noise result :
– From rolling vortex produce by rotating blades
interacting with stationary vane
– From mixing of jet efflux with cold ambient air
• Method :
• Using honeycomb for intake and casing
• Using Suppressor nozzle (lobe and corrugation)

8.
NOZZLE SUPPRESSORS

9.
THRUST REVERSAL
• Control by lever mounted forward of
thrrottles
• It rotate the airflow and directed airflow 450
• Purpose :
– Aid in braking
– Aid in directional control
– Reverse aircraft out of parking

10.
THRUST REVERSER TYPE
CLAMSHELL TYPE
BUCKET TYPE
COLD STREAM TYPE