Puzzle

123456789101112131415
Across
  1. 4. to produce refrigerating effect
  2. 6. mach number
  3. 7. coefficient of performance
  4. 10. distance between two blades
  5. 11. energy transfer
  6. 13. Seperate between system surrounding
  7. 14. to produce power
  8. 15. use in open system
Down
  1. 1. use in air craft
  2. 2. Both mass and energy transfer
  3. 3. use in steam turbine
  4. 5. constant channel area
  5. 8. compress the air
  6. 9. leading edge
  7. 12. to develop power