easa part 66 module 15.6 : turbine
DESCRIPTION
TRANSCRIPT
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PURPOSE
• To drive the compressor• Absorb a high proportion of energy of gas
stream and converting into torque.
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TYPE OF TURBINE1.Impulsive type 2.Reaction type
3.Impulsive/reaction
4. Radial Inflow type
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TURBINE ATTACHMENT
High Pressure Attachment
Low Pressure Attachment
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BLADE TO DISK ATTACHMENT
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COOLING TURBINE BLADE
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NOZZLE GUIDE VANE• Direct airflow to turbine blade• Convert pressure energy into kinetic energy• Air flow become spin and swirl
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BLADE STRESS AND CREEP
• Creep is due to blade grow in length due to high temperature and centrifugal force(stress)
• Stretch of blade occur in 3 stage :– 1st stage: rapid extention and decrease– 2nd stage : Constant rate of expansion– 3rd stage : Rapid extention and failure occur
• Improve grain structure and properties can improve service life