Management system for heat generated by aircraft gas turbine ins

Power plants – Combustion products used as motive fluid – With lubricators

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60736, F02C 714

Patent

active

051215985

ABSTRACT:
A program-controlled heat management system for an aircraft's bypass gas turbine (turbofan) engine installation, in which the engine's fuel system is put into direct heat exchange relationship with the engine's own oil system, and with an engine-driven electrical generators's oil system, by means of respective fuel/oil heat exchangers and also into selective indirect heat exchanger relationship with a variable proportion of the engine's bypass air means of an engine oil/air heat exchanger. The fuel system is switchable between four different fuel flow configurations in order to vary the heat flows between the fuel system and the oil systems, two of the fuel flow configurations also involving recirculation of fuel from the engine's fuel system to a fuel tank in the aircraft wing in order to put the fuel system into selective heat exchange relationship with the tank and hence with the airstream passing over the wing. Temperatures in the oil and fuel systems are monitored and kept within predetermined limits by selecting the appropriate fuel flow configuration and selectively dumping heat to the environment through the engine oil/air heat exchanger and the aircraft wing in a way which maximizes the fuel efficiency of the engine.

REFERENCES:
patent: 4151710 (1979-05-01), Griffin et al.
patent: 4354345 (1982-10-01), Dreisbach, Jr.
patent: 4404793 (1983-09-01), Coffinberry
patent: 4474001 (1984-10-01), Griffin et al.
patent: 4505124 (1985-03-01), Mayer
patent: 4696156 (1987-09-01), Burr et al.
patent: 4705100 (1987-11-01), Black et al.
patent: 4773212 (1988-09-01), Griffin et al.
ASME 86-GT-76 Heat Management in Advanced Aircraft Gas Turbine Engines-G. L. Brines and D. E. Gray; Jun., 1986.

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