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EASA Part 66 Module 15.7 : Exhausts

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EASA Part 66 Module 15.7 : Exhausts

  1. 1. 15.7 EXHAUSTS http://part66.blogspot.com/
  2. 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. 3. CONSTRUCTION CONVERGENT SHAPE for subsonic
  4. 4. BY PASS EXHAUST MIXER LOW BY PASS RATIO HIGH BY PASS RATIO
  5. 5. SUPERSONIC NOZZLE • Divergent shape • When nozzle is choked, upstream pressure increase above atmospheric. • Pressure different provide pressure thrust
  6. 6. AFTERBURNER Purposely to provide suddent thrust for fighter aircraft
  7. 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. 8. NOZZLE SUPPRESSORS
  9. 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. 10. THRUST REVERSER TYPE CLAMSHELL TYPE BUCKET TYPE COLD STREAM TYPE

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