Preliminary study of the fuel saving potential of regenerative turbofans for commercial subsonic transports

Technical Report · Fri Aug 01 00:00:00 EDT 1975

OSTI ID:7239405

Kraft, G A

The fuel savings potential of regenerative turbofans was calculated and compared with that of a reference turbofan. At the design altitude of 10.67 km and Mach 0.80, the turbine-inlet-temperature of the regenerative turbofan was fixed at 1700 K, while the overall pressure ratio was varied from 10 to 20. The fan pressure ratio was fixed at 1.6 and the bypass ratio varied from 8 to 10. The heat exchanger design parameters, such as pressure drop and effectiveness, varied from 4 to 8% and from 0.80 to 0.90, respectively. Results indicate a fuel savings due to regeneration of 4.1% and no change in takeoff gross weight.

• Research Organization: National Aeronautics and Space Administration, Cleveland, Ohio (USA). Lewis Research Center
• OSTI ID: 7239405
• Report Number(s): N-75-30178; NASA-TM-X-71785; E-8450
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103 -- Internal Combustion Engines-- Turbine
330603* -- Vehicle Design Factors-- Engine System
AIRCRAFT
DESIGN
ENERGY RECOVERY
FUEL ECONOMY
HEAT EXCHANGERS
HEAT RECOVERY
OPERATION
PRESSURE DEPENDENCE
RECOVERY
TURBINES
TURBOMACHINERY