Impulse and turbine
- 1. SENTHUR POLYTECHNIC COLLEGE DEPARTMENT OF MECHANICAL ENGINEERING 4020520/ THERMAL ENGINEERING II SEMINAR PRESENTATION Submitted by S E M I N A R T O P I C I M P L U S E A N D R E A C T I O N T U R B I N E S U B M I T T E D B Y B A L A M U R U G A N . A ( 2 2 2 1 6 3 8 5 )
- 3. Energy transformation( i.e from pressure energy to kinetic energy takes place only in nozzle for impulse turbine Reaction turbines don't have nozzle and energy transformation takes place in both moving as well as fixed blades
- 4. Impulse turbines have constant blade channel area as energy transformation don't have to take place Reaction turbine have converging blade channel area so that they can act as nozzle
- 5. Impulse turbines have profile blade shape Reaction turbine have airfoil blade shape
- 6. Impulse turbines have low efficiency due to high losses Reaction turbine have high efficiency compared to impulse turbines
- 7. Impulse turbines have scope for partial admission of steam and hence both nozzle and throttle governing can be employed for impulse turbines Reaction turbines requires full admission of steam and hence only throttle governing can be used for reaction turbine
- 8. Impulse turbines are cheap because of easy and low cost manufacturing and also have low cost maintenance Reaction turbines are costly because of high cost manufacturing and also have maintenance cost is also high