Performance Characteristics of Turbo Jet Engines P M

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

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

Sizing of Turbine : Just Enough Power 2 4 C 3 T 5 Duty of the Turbine is to drive the compressor : just enough power. Enhanced vigor of Jet:

Remaining Life & Energy of Jet

Life Infusion Vs Life Loss Turbojet feasibility condition:

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

Thermodynamic SSSF model for Nozzle

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

The velocity of Turbojet

Generation of Thrust : The Capacity

Specific Thrust S

Thrust Specific Fuel Consumption TSFC Propulsive Power or Thrust Power:

Aviation Appreciation Propulsion Efficiency

Thermodynamic Appreciation Thermodynamic Efficiency

Global Appreciation of Turbojet Engine

Turbojet engine Is it a wise Model? ? ?

S TSFC Mac TSFC kg/ k. N. hr Specific Thrust k. N. s/kg Performance of a Ideal Turbojet Engine @ Variable Mach Number r 0 p, comp = 10 0, cc=4. 5

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

Effect of Flight Mach Number on Compactness Specific Thrust k. N. s/kg 0, cc=4. 5 r 0 p=3 r 0 p=2 r 0 p=10 r 0 p=30 Mac r 0 p=20

Effect of Pressure Ratio on Compactness Mac=0 0, cc=4. 5 Specific Thrust k. N. s/kg Mac=0. 5 Mac=1. 0 Mac=1. 5 Mac=2. 0 Mac=3. 0 r 0 p Mac=2. 5

Effect of Flight Mach Number on Fuel Air Ratio 0, cc=4. 5 r 0 p, comp 1 2 3 5 10 20 30 Mac

Effect of Pressure Ratio on Fuel Air Ratio t 0, cc=4. 5 rp

Effect of Flight Mach Number on Fuel Economy TSFC kg/ k. N. hr 0, cc=4. 5 r 0 p=2 r 0 p=1 r 0 p=3 r 0 p=5 r 0 p=10 r 0 p=20 r 0 p=30 Mac

Effect of Pressure Ratio on Fuel Economy TSFC kg/ k. N. hr 0, cc=4. 5 Mac rp

Effect of Flight Mach Number on Propulsion Efficiency 0, cc=4. 5 r 0 p = 30 r 0 p = 5 Mac r 0 p =2

Effect of Flight Mach Number on Thermal Efficiency 0, cc=4. 5 r 0 p =30 r 0 p =5 r 0 p =2 Mac

Effect of Flight Mach Number on Overall Efficiency 0, cc=4. 5 h. O r 0 p 0 3 = 5 = r 0 p 2 = r 0 p Mac

Major Drawback in Turbojet Mac=0 0, cc=4. 5 Specific Thrust k. N. s/kg Mac=0. 5 Mac=1. 0 Mac=1. 5 Mac=2. 0 Mac=3. 0 r 0 p Mac=2. 5

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