1. 15.6 TURBINE SECTION
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2. PURPOSE
• To drive the compressor
• Absorb a high proportion of energy of gas
stream and converting into torque.

3. TYPE OF TURBINE
1.Impulsive type 2.Reaction type
4. Radial Inflow type
3.Impulsive/reaction

4. TURBINE ATTACHMENT
Low Pressure Attachment
High Pressure Attachment

5. BLADE TO DISK ATTACHMENT

6. COOLING TURBINE BLADE

7. NOZZLE GUIDE VANE
• Direct airflow to turbine blade
• Convert pressure energy into kinetic energy
• Air flow become spin and swirl

8. 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