EP0807211A1 - Ringdiffusor für eine gasturbinen-brennkammer - Google Patents
Ringdiffusor für eine gasturbinen-brennkammerInfo
- Publication number
- EP0807211A1 EP0807211A1 EP96902919A EP96902919A EP0807211A1 EP 0807211 A1 EP0807211 A1 EP 0807211A1 EP 96902919 A EP96902919 A EP 96902919A EP 96902919 A EP96902919 A EP 96902919A EP 0807211 A1 EP0807211 A1 EP 0807211A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diffuser
- ring
- struts
- gas turbine
- turbine combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 11
- 230000000694 effects Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/10—Air inlet arrangements for primary air
Definitions
- the invention relates to an annular diffuser for a gas turbine combustion chamber with at least two annular diffuser channels which are essentially adjacent to one another in the radial direction and which, viewed in the circumferential direction, have a large number of air outlets separated from one another by struts.
- Such a ring diffuser is known for supplying, in particular, staged gas turbine combustion chambers, ie. H. such combustion chambers, which in addition to main burners also have pilot burners, from US Pat. No. 5,077,967.
- the diffuser channel located in the radial direction serves to supply the individual pilot burners, while the diffuser channel located in the radial direction supplies the main burner with air in particular.
- the two annular diffuser channels are viewed in the circumferential direction, as usual, divided by a plurality of struts.
- These struts extend between the inner and outer walls of the respective diffuser channel and serve on the one hand to support these channel walls, and on the other hand also to improve the air flow or distribution of the air flow among the several torches which are also arranged in a ring.
- the struts of the diffuser channels which are adjacent to one another in the radial direction are arranged offset with respect to one another.
- FIG. 1 shows a partial section through a ring diffuser
- FIG. 2 shows the partial view X from FIG. 1.
- the combustion air delivered by an axial compressor, not shown, is fed via an annular diffuser 1 to an annular gas turbine combustion chamber, also not shown.
- annular diffuser 1 Between the inner wall 2a and the outer wall 2b of the ring diffuser 1, a plurality of guide vanes 4 are initially provided in the air flow direction (arrow direction 3), downstream of which the ring diffuser 1 branches into two annular diffuser channels 5a, 5b which are essentially adjacent to one another in the radial direction R.
- the radially inner diffuser channel can, for example, supply the pilot burners of the stepped combustion chamber (not shown), while the outer diffuser channel 5b can be assigned to the respective main burners.
- the diffuser channels 5a, 5b have a multiplicity of adjacent air outlets 6a and 6b, which are separated from one another by struts 7. These struts extend between the walls 2a, 2a 'and 2b, 2b' delimiting the respective diffuser channels 5a, 5b in the radial direction.
- each strut 7 of the diffuser channel 5a is arranged offset to one another. This means that, viewed in the circumferential direction U, each strut 7 of the diffuser channel 5a is essentially between two struts 7 of the diffuser channel 5b and vice versa.
- Another advantage of the strut arrangement shown is that the stresses in the component caused by temperature peaks or an uneven temperature distribution are reduced.
- the walls of the outer diffuser duct 5b are still relatively cold, while the walls of the inner diffuser duct 5a are already warmed up by the hot air flow conveyed by the compressor part of the gas turbine according to arrow direction 3.
- This different temperature distribution can lead to stress cracks, particularly in the area where the walls 2a 'and 2b' are brought together, in particular if this join or the two walls 2a ', 2b' are themselves relatively stiff.
- the struts 7 - as shown - are arranged offset between the walls 2b and 2b 'or 2a and 2a' in the circumferential direction, this gives this entire component structure a certain softness which promotes the reduction of stress peaks. Possible stresses resulting from temperature peaks or an uneven temperature distribution can be derived therewith, so that the probability of cracks in the component due to the offset arrangement of the struts 7 is significantly reduced.
- the same inventive effects can also be achieved if, for example, the struts 7 of the inner diffuser channel 5a do not lie exactly between the two struts 7 of the outer diffuser channel 5b, but more or less off-center with respect to the respective other air outlet 6b.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19503567 | 1995-02-03 | ||
| DE19503567A DE19503567A1 (de) | 1995-02-03 | 1995-02-03 | Ringdiffusor für eine Gasturbinen-Brennkammer |
| PCT/EP1996/000299 WO1996023978A1 (de) | 1995-02-03 | 1996-01-25 | Ringdiffusor für eine gasturbinen-brennkammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0807211A1 true EP0807211A1 (de) | 1997-11-19 |
| EP0807211B1 EP0807211B1 (de) | 1999-05-19 |
Family
ID=7753124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96902919A Expired - Lifetime EP0807211B1 (de) | 1995-02-03 | 1996-01-25 | Ringdiffusor für eine gasturbinen-brennkammer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0807211B1 (de) |
| CA (1) | CA2208843A1 (de) |
| DE (2) | DE19503567A1 (de) |
| WO (1) | WO1996023978A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2241840C2 (ru) * | 2002-11-12 | 2004-12-10 | Открытое акционерное общество "Авиадвигатель" | Газотурбинный двигатель |
| FR2880391A1 (fr) * | 2005-01-06 | 2006-07-07 | Snecma Moteurs Sa | Diffuseur pour chambre annulaire de combustion, en particulier pour un turbomoteur d'avion |
| US11732892B2 (en) | 2013-08-14 | 2023-08-22 | General Electric Company | Gas turbomachine diffuser assembly with radial flow splitters |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2704089A (en) * | 1952-06-09 | 1955-03-15 | Lee R Woodworth | Gas turbine diffuser |
| DE1092159B (de) * | 1956-12-20 | 1960-11-03 | Messerschmitt Boelkow Blohm | Axialverdichter mit relativer UEberschallgeschwindigkeit |
| GB1315856A (en) * | 1970-03-20 | 1973-05-02 | Secr Defence | Flow restrictors |
| US5077967A (en) * | 1990-11-09 | 1992-01-07 | General Electric Company | Profile matched diffuser |
| US5165850A (en) * | 1991-07-15 | 1992-11-24 | General Electric Company | Compressor discharge flowpath |
| US5323604A (en) * | 1992-11-16 | 1994-06-28 | General Electric Company | Triple annular combustor for gas turbine engine |
-
1995
- 1995-02-03 DE DE19503567A patent/DE19503567A1/de not_active Withdrawn
-
1996
- 1996-01-25 DE DE59601944T patent/DE59601944D1/de not_active Expired - Fee Related
- 1996-01-25 WO PCT/EP1996/000299 patent/WO1996023978A1/de not_active Ceased
- 1996-01-25 EP EP96902919A patent/EP0807211B1/de not_active Expired - Lifetime
- 1996-01-25 CA CA002208843A patent/CA2208843A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9623978A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19503567A1 (de) | 1996-08-08 |
| WO1996023978A1 (de) | 1996-08-08 |
| CA2208843A1 (en) | 1996-08-08 |
| EP0807211B1 (de) | 1999-05-19 |
| DE59601944D1 (de) | 1999-06-24 |
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