1. TYPICAL FUEL SYSTEM
GAS TURBINE ENGINE

2. 1ST – WE WILL LOOK AT HYDROMECHANICAL SYSTEMS

3. MECHANICAL DRIVE FROM ENGINE
OIL IN
OIL OUT
FUEL/OIL
HEAT
EXCHANGER
FUEL DISTRIBUTION AND SPRAY NOZZLES
BOOSTER PUMP
LP FUEL PUMP
WING
FUEL
TANK
HP FUEL PUMP
LP FUEL FILTER
PUMP OUTPUT CONTROL SIGNAL
FUEL CONTROL UNIT
MULTI PLUNGER (SWASH-PLATE) PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

4. TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE
PUMP INPUT DRIVE
LP FUEL IN
PUMP IMPELLOR
LOW PRESSURE PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

5. TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE
HOT OIL IN
FCOC PRESSURE RELIEF VALVE
COOLED OIL OUT
FILTER PRESSURE RELIEF VALVE
HOT LP FUEL OUT
FUEL TUBES
OIL BAFFLE PLATES
FILTER PAPER ELEMENT
FUEL COOLED OIL COOLER (FCOC)
LP FUEL FILTER
COLD LP FUEL IN
FUEL/OIL HEAT EXCHANGER AND FUEL FILTER
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

6. SERVO (CONTROL) PRESSURE MECHANICAL INPUT DRIVE
‘SWASH’ PLATE
SERVO PISTON
SERVO (CONTROL) PRESSURE
FUEL PUMPED OUT
FUEL PUMPED OUT
MECHANICAL INPUT DRIVE
KIDNEY PLATE
FUEL DRAWN IN
FUEL DRAWN IN
OPERATINGPISTON
KIDNEY PORT
MULTI PLUNGER (SWASH-PLATE) PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

7. TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE
FUEL FLOW
GAL/HR LTR/SEC
IDLE
MAX
PUMP MAXIMUM FLOW = CAMPLATE MAXIMUM ANGLE
‘STEADY-STATE’ FUEL DEMAND
‘STEADY-STATE’ CRUISE CAMPLATE ANGLE
CRUISE FUEL FLOW
PUMP MINIMUM FLOW = CAMPLATE MINIMUM ANGLE
ENGINE RPM
IDLE
MAX
CRUISE RPM
MULTI PLUNGER (SWASH-PLATE) PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

8. NOW – WE WILL LOOK AT ELECTRONICALLY CONTROLLED SYSTEMS

9. MECHANICAL DRIVE FROM ENGINE
OIL IN
OIL OUT
FUEL/OIL
HEAT
EXCHANGER
FUEL DISTRIBUTION AND SPRAY NOZZLES
BOOSTER PUMP
LP FUEL PUMP
WING
FUEL
TANK
HP FUEL PUMP
LP FUEL FILTER
FUEL ‘SPILL’ FLOW
FADEC – ELECTRONIC SIGNAL
FUEL CONTROL UNIT
GEAR TYPE PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

10. TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE
PUMP FLOW AND RESTRICTION TO FLOW IN CONTROLLER CAUSES PRESSURE TO INCREASE
‘SPUR’ GEARS
Flow Controller
FLOW OUT
GEAR TYPE PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

11. TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE
FUEL FLOW
GAL/HR LTR/SEC
IDLE
MAX
PUMP FLOW
PUMP OUTPUT
‘STEADY-STATE’ FUEL DEMAND
SPILL FLOW
CRUISE FUEL FLOW
COMBUSTION FLOW
ENGINE RPM
IDLE
MAX
CRUISE RPM
GEAR TYPE PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

12. TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE
FUEL FLOW
GAL/HR LTR/SEC
IDLE
MAX
PUMP FLOW
COMBUSTION FLOW
SPILL FLOW
ENGINE RPM
IDLE
MAX
GEAR TYPE PUMP
TYPICAL FUEL SYSTEM - GAS TURBINE ENGINE

13. Any questions?