Parametric Analysis of Turbofan Engine

1
Parametric Analysis of Turbofan Engine

• P M V Subbarao
• Professor
• Mechanical Engineering Department

Selection of Suitable Design Parameters.
2
Performance Analysis of Turbofan

• Operational Parameters Flight Mach number
  Ambient conditions.
• Design Variables Fan Pressure Ratio, Bypass
  Ratio, Compressor Pressure Ratio, Combustion
  Chamber Temperature Ratio.
• Fan Effects
• Fan Pressure Ratio
• Bypass Ratio.
• Fan Stream Thrust Vs Total Thrust.

3
Fan Effects . Fan Pressure Ratio Mac 0.75
r0,p,comp15.0 a4.0 T0max1200K
4
Effect of Fan Bypass Ratio
r0,p,fan2.5 r0,p,comp15 T0max1200K
Mac 0.75
5
Optimum Fan Pressure Ratio for Compactness
Specific Thrust kN.s/kg
r0,p,comp24 T0max1800K Mac 0.9
Fan Pressure Ratio
6
Optimum Fan Pressure Ratio for Fuel Economy
r0,p,comp24 T0max1800K Mac 0.9
TSFC
Fan Pressure Ratio
7
Optimum Fan Pressure Ratio for Propulsion
Efficiency
r0,p,comp24 T0max1800K Mac 0.9
a
Fan Pressure Ratio
8
Fan Effects on Thrust Ratio
r0,p,comp24 T0max1800K Mac 0.9
Fan Pressure Ratio
9
Effect of Flight Mach Number Compactness
Specific Thrust kN.s/kg
Mach Number
10
Effect of Flight Mach Number Fuel Economy
TSFC
Mach Number
11
Effect of Flight Mach Number Propulsion
Efficiency
Mach Number
12
Effect of Flight Mach Number Overall Efficiency
Mach Number