Combustion chamber

Details Combustion chamber Combustion chamber

1997-03-31

1999-03-23

Dority, Carroll

Combustion

Combustion products return structure

Recirculation about mixing or combustion chamber wall or baffle

431174, 431285, 60746, 60737, 60750, F23C 500

Patent

active

058850686

ABSTRACT:
In a combustion chamber of a gas-turbine group which essentially comprises a mixing section (2) for premixing an air/fuel mixture (16) and a downstream combustion space (3), a jump (5) in cross section is provided at the transition between the two said flow sections (2/3). This jump (5) in cross section induces the cross section of flow of the combustion space (3) and at the same time forms outer recirculation zones (10) in the combustion space (3). Flow passages (4) branch off in the end phase of the mixing section (2), which flow passages (4) then lead into the outer recirculation zones (10). A portion (9) of the air/fuel mixture flows out of the mixing section (2) through these flow passages (4) and into the outer recirculation zones (10), the portion being enriched here with an additional fuel (6). This fuel (6) is introduced via a circular line (19) provided with bores (18). The branched off mixture (9) constitutes a self-igniting pilot flame in the outer recirculation zones (10), which pilot flame substantially stabilizes the flame front (20).

REFERENCES:
patent: 4062182 (1977-12-01), Fehler et al.
patent: 4395223 (1983-07-01), Okigami et al.
patent: 5359847 (1994-11-01), Pillsbury et al.
patent: 5638682 (1997-06-01), Joshi et al.

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