US4408461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber of a gas turbine with pre-mixing and pre-evaporation elements
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1980-10-20
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Granted: 1983-10-11
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Expires: 2000-10-20
Abstract
Abstract A combustion chamber for a gas turbine which is equipped with a number of tubular-shaped elements, within which there occurs between the fuel and the compressed air a pre-mixing/pre-evaporation process. Each tubular element is closed at its end at the side of its combustion space by a flame baffle provided with one or a number of openings, so that the combustion first can occur downstream of the flame baffle, whereby there is appreciably reduced the emissivity of noxious substances from the combustion process.
Inventors
- 👤 Eduard Bruhwiler
- 👤 Hans Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:30
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23R3/286; F23R3/02; F23R3/04; F23R3/10; F23R3/30; F23R3/32; F23D; F23D2209/00; F23D2209/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
176 words
A combustion compartment for a gas turbine comprising: (a) a combustion compartment casing containing therein an air distributor chamber and a combustion chamber spatially separated from one another; (b) a number of substantially tubular-shaped elements arranged between the air distribution chamber and the combustion chamber; (c) nozzle means for infeeding a combustible medium to an end of said tubular-shaped elements located at the side of the air distributor chamber; (d) the admixing and pre-evaporation of said combustible medium occurring within said plurality of tubular-shaped elements; (e) each said tubular-shaped element having an end located at the side of the combustion chamber; (f) at least one flame baffle for closing the end of the tubular-shaped elements located at the side of the combustion chamber, said flame baffle being provided with openings; (g) at least one pilot element located between said tubular-shaped elements; and (h) said combustible medium comprises fuel oil which is infed by said nozzle means and which is premixed and pre-evaporated within said tubular-shaped elements and admixed with compressed air with a large excess-air coefficient.
Claim 2
Dependent Claim
176 words
A combustion compartment for a gas turbine comprising: (a) a combustion compartment casing containing therein an air distributor chamber and a combustion chamber spatially separated from one another; (b) a number of substantially tubular-shaped elements arranged between the air distribution chamber and the combustion chamber; (c) nozzle means for infeeding a combustible medium to an end of said tubular-shaped elements located at the side of the air distributor chamber; (d) the admixing and pre-evaporation of said combustible medium occurring within said plurality of tubular-shaped elements; (e) each said tubular-shaped element having an end located at the side of the combustion chamber; (f) at least one flame baffle for closing the end of the tubular-shaped elements located at the side of the combustion chamber, said flame baffle being provided with openings; (g) at least one pilot element located between said tubular-shaped elements; and (h) said combustible medium comprises fuel oil which is infed by said nozzle means and which is premixed and pre-evaporated within said tubular-shaped elements and admixed with compressed air with a large excess-air coefficient.
Claim 3
Dependent Claim
171 words
A combustion compartment for a gas turbine comprising: (a) a combustion compartment casing containing therein an air distributor chamber and a combustion chamber spatially separated from one another; (b) a number of substantially tubular-shaped elements arranged between the air distribution chamber and the combustion chamber; (c) nozzle means for infeeding a combustible medium to an end of said tubular-shaped elements located at the side of the air distributor chamber; (d) the admixing of said combustible medium occurring within said plurality of tubular-shaped elements; (e) each said tubular-shaped element having an end located at the side of the combustion chamber; (f) at least one flame baffle for closing the end of the tubular-shaped elements located at the side of the combustion chamber, said flame baffle being provided with openings; (g) at least one pilot element located between said tubular-shaped elements; and (h) said combustible medium comprises a fuel gas which is infed by said nozzle means and which is admixed with compressed air within said tubular-shaped elements with a large excess-air coefficient.
Claim 4
Dependent Claim
171 words
A combustion compartment for a gas turbine comprising: (a) a combustion compartment casing containing therein an air distributor chamber and a combustion chamber spatially separated from one another; (b) a number of substantially tubular-shaped elements arranged between the air distribution chamber and the combustion chamber; (c) nozzle means for infeeding a combustible medium to an end of said tubular-shaped elements located at the side of the air distributor chamber; (d) the admixing of said combustible medium occurring within said plurality of tubular-shaped elements; (e) each said tubular-shaped element having an end located at the side of the combustion chamber; (f) at least one flame baffle for closing the end of the tubular-shaped elements located at the side of the combustion chamber, said flame baffle being provided with openings; (g) at least one pilot element located between said tubular-shaped elements; and (h) said combustible medium comprises a fuel gas which is infed by said nozzle means and which is admixed with compressed air within said tubular-shaped elements with a large excess-air coefficient.
Claim 5
Dependent Claim
63 words
The combustion compartment as defined in claim 1 or 2 further including: a plurality of said pilot elements; said plurality of pilot elements being geometrically uniformly arranged below said tubular-shaped elements such that during placing into operation of the individual tubular-shaped elements, in a staggered fashion as a function of the turbine load, there occurs a jumping-over of flames to surrounding tubular-shaped elements.
Claim 6
Dependent Claim
31 words
The combustion chamber as defined in claim 1, wherein: said fuel oil is injected by said nozzle means in a direction opposite to a direction of flow of the compressed air.
Claim 7
Dependent Claim
55 words
The combustion compartment as defined in claim 1 or 2 wherein: said openings in the flame baffle are in the form of substantially cylindrical holes extending essentially parallel to the lengthwise axis of the related tubular-shaped element; and said holes having a length of at least equal to or greater than 1.5-fold the hole diameter.
Claim 8
Dependent Claim
67 words
The combustion compartment as defined in claim 1 or 2 wherein: said openings in the flame baffle comprise holes extending at an inclination in radial planes of the flame baffle; the angle of inclination of said holes continuously increasing from the center towards the periphery of the flame baffle; and the length of such holes being at least equal to or greater than 1.5-fold the hole diameter.
Claim 9
Dependent Claim
68 words
The combustion compartment as defined in claim 1 or 2 wherein: said openings in the flame baffle comprise holes extending at an inclination in radial planes of the flame baffle; the angle of inclination of said holes remaining essentially constant from the center towards the periphery of the flame baffle; and the length of such holes being at least equal to or greater than 1.5-fold the hole diameter.
Claim 10
Dependent Claim
67 words
The combustion compartment as defined in claim 1 or 2 wherein: the openings in the flame baffle comprise holes extending at an inclination in tangential planes of the flame baffle; the angle of inclination of said holes continuously increasing from the center towards the periphery of the flame baffle; and the length of the holes being at least equal to or greater than 1.5-fold the whole diameter.
Claim 11
Dependent Claim
68 words
The combustion compartment as defined in claim 1 or 2 wherein: said openings in the flame baffle comprise holes extending at an inclination in tangential planes of the flame baffle; the angle of inclination of said holes remaining essentially constant from the center towards the periphery of the flame baffle; and the length of the holes being at least equal to or greater than 1.5-fold the whole diameter.
Claim 12
Dependent Claim
22 words
The combustion compartment as defined in claim 1 or 2 further including: spin-imparting bodies provided for the openings at the flame baffle.
Claim 13
Dependent Claim
89 words
The combustion compartment as defined in claim 1 or 2 wherein: said flame baffle comprises an upper plate and a lower plate; channel means extending between said upper plate and said lower plate and flow communicating with said openings of said flame baffle; two respective conical bushing means lining each of said openings; said bushing means telescopically overlapping one another with play at the region of said channel means; and a medium flowing through said channel means flowing-out along with the combustible medium emanating from the related tubular-shaped element.
Claim 14
Dependent Claim
44 words
The combustion compartment as defined in claim 1 or 2 wherein: the openings in the flame baffle are constructed as diffusors following which there are arranged substantially cylindrical openings; and said substantially cylindrical openings having a length amounting to at least 1.5-fold their diameter.
Claim 15
Dependent Claim
39 words
The combustion compartment as defined in claim 1 or 2 wherein: said flame baffle has an edge extending about an outer jacket of the related tubular-shaped element; and said flame baffle edge being provided with a number of openings.
Claim 16
Dependent Claim
23 words
The combustion compartment as defined in claim 1 or 2 wherein: the outer circumference of the flame baffle is of substantially polygonal configuration.
Claim 17
Dependent Claim
39 words
The combustion compartment as defined in claim 1 or 2 further including: an air funnel and a subsequently merging stepped mouth provided for each tubular-shaped element at an end thereof located at the side of the air distributor chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |