1. Performance Characteristics of Turbo Jet Engines
P M V Subbarao
Professor
Mechanical Engineering Department
Enhanced Life at The Thrust generator Inlet….

2. Turbojet engine :Turbine as A Slave to Drive Compressor
Vac
Vjet

3. Sizing of Turbine : Just Enough Power4 5 T C 2 3
Duty of the Turbine is to drive the compressor : just enough power.
Enhanced vigor of Jet:

4. Remaining Life & Energy of Jet

5. Life Infusion Vs Life Loss
Turbojet feasibility condition:

6. The Thrust Generator with better Inlet Conditions
Isentropic Expansion in a Passive Device
(Nozzle)

7. Thermodynamic SSSF model for Nozzle

8. Subsonic Vs Supersonic Turbojet Engine
For subsonic engine:
For supersonic engine:

9. The velocity of Turbojet

10. Generation of Thrust : The Capacity

11. Specific Thrust S

12. Thrust Specific Fuel Consumption TSFC
Propulsive Power or Thrust Power:

13. Aviation Appreciation
Propulsion Efficiency

14. Thermodynamic Appreciation
Thermodynamic Efficiency

15. Global Appreciation of Turbojet Engine

16. Turbojet engine
Is it a wise Model???

17. Performance of a Ideal Turbojet Engine @ Variable Mach Number
r0p,comp = 10
0,cc=4.5 S
TSFC kg/ kN.hr
Specific Thrust kN.s/kg
TSFC
Mac

18. Parametric Cycle Analysis of Ideal Turbo Jet Engine
Selection of Safe Cruising Conditions….

19. Effect of Flight Mach Number on Compactness
0,cc=4.5
r0p=20
r0p=30
r0p=10
r0p=5
r0p=3
r0p=2
r0p=1
Specific Thrust kN.s/kg
Mac

20. Effect of Pressure Ratio on Compactness
Mac=0
0,cc=4.5
Mac=0.5
Mac=1.0
Mac=1.5
Mac=2.0
Specific Thrust kN.s/kg
Mac=2.5
Mac=3.0
r0p

21. Effect of Flight Mach Number on Fuel Air Ratio
0,cc=4.5
r0p,comp 1 2 3 5 10 20 30
Mac

22. Effect of Pressure Ratio on Fuel Air Ratio
t0,cc=4.5 rp

23. Effect of Flight Mach Number on Fuel Economy
0,cc=4.5
r0p=1
r0p=2
r0p=3
TSFC kg/ kN.hr
r0p=5
r0p=10
r0p=20
r0p=30
Mac

24. Effect of Pressure Ratio on Fuel Economy
0,cc=4.5
TSFC kg/ kN.hr
Mac rp

25. Effect of Flight Mach Number on Propulsion Efficiency
0,cc=4.5
r0p = 30
r0p =2
r0p = 5
Mac

26. Effect of Flight Mach Number on Thermal Efficiency
0,cc=4.5
r0p
r0p =30
r0p =5
r0p =2
Mac

27. Effect of Flight Mach Number on Overall Efficiency
0,cc=4.5
r0p =30 hO
r0p =5
r0p =2
r0p
Mac

28. Major Drawback in Turbojet
Mac=0
0,cc=4.5
Mac=0.5
Mac=1.0
Mac=1.5
Mac=2.0
Specific Thrust kN.s/kg
Mac=2.5
Mac=3.0
r0p

29. Turbo Jet with Afterburner
inlet 1 2 7 5 3 6 4