Combustion heated air turbine starter system

Details Combustion heated air turbine starter system Combustion heated air turbine starter system

1990-09-13

1991-10-08

Bertsch, Richard A.

Power plants

Combustion products used as motive fluid

Different fluids

60262, F02C 100

Patent

active

050542842

ABSTRACT:
In order to enhance the effectiveness of an air turbine starter 12, an auxiliary or emergency power unit 16 is adapted to deliver air through a bleed duct 18. This bleed duct 18 is in communication with the air turbine starter 12 which, in turn, is operatively associated with a main turbine engine 14. By placing a combustor 20 within the bleed duct 18 at a point upstream of the air turbine starter 12, it is possible to combust fuel from a source with air form the auxiliary or emergency power unit 16. This substantially increases the available power by elevating air temperature rather than inceasing size of the auxiliary or emergency power unit 16. Since it is possible to preheat the air in the bleed duct 18, the air turbine starter 12 can be driven by a smaller auxiliary or emergency power unit 16 to start the main turbine engine 14.

REFERENCES:
patent: 2852915 (1958-09-01), Jendrassik
patent: 3098626 (1963-07-01), Messinger
patent: 4693073 (1987-09-01), Blackburn
patent: 4777793 (1988-10-01), Weigard et al.
Rodgers, C., "Impingement Starting and Power Boosting of Small Gas Turbines", Journal of Engineering for Gas Turbines and Power, pp. 821-827, Oct., 1985.

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