EP0971172A1 - Brennkammer für eine Gasturbine mit schalldämpfender Wandstruktur - Google Patents
Brennkammer für eine Gasturbine mit schalldämpfender Wandstruktur Download PDFInfo
- Publication number
- EP0971172A1 EP0971172A1 EP98810656A EP98810656A EP0971172A1 EP 0971172 A1 EP0971172 A1 EP 0971172A1 EP 98810656 A EP98810656 A EP 98810656A EP 98810656 A EP98810656 A EP 98810656A EP 0971172 A1 EP0971172 A1 EP 0971172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- openings
- combustion chamber
- wall
- perforated plate
- 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 71
- 230000030279 gene silencing Effects 0.000 title 1
- 238000013016 damping Methods 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims description 14
- 230000000737 periodic effect Effects 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000000567 combustion gas Substances 0.000 claims description 2
- 230000003584 silencer Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/023—Helmholtz resonators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
- F23M20/005—Noise absorbing means
-
- 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
- F23R3/002—Wall structures
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/15—Plurality of resonance or dead chambers
- F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/20—Heat transfer, e.g. cooling
- F05B2260/201—Heat transfer, e.g. cooling by impingement of a fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
-
- 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
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/00014—Reducing thermo-acoustic vibrations by passive means, e.g. by Helmholtz resonators
Definitions
- the present invention relates to the field of gas turbines. It affects a combustion chamber for a gas turbine, in which combustion chamber the hot combustion gases a combustion zone are enclosed by inner walls, which are cooled by cooling air supplied outside the inner walls.
- Such a combustion chamber is in the form of a secondary combustion chamber e.g. from the Document EP-A1 0 669 500 of the applicant is known.
- Gas turbines can cause pressure vibrations during operation under certain conditions or acoustic vibrations that occur in terms of frequency Range of several kHz, e.g. 1.8 kHz or around 5 kHz. Such Vibrations prove to be disruptive to the operation and are therefore undesirable.
- a way to dampen or suppress such vibrations consists in providing fluidic means in the combustion chamber, which influence the flow of hot gases in that the acoustic vibrations are not excited or only to a small extent.
- Helmholtz resonators on the combustion chamber attach to the vibrations as damping elements couple and dampen the vibrations or disappear completely bring.
- a gas turbine combustor is described in US Pat. No. 5,644,918, in the case of the cooling air leading within the combustion chamber Double jacket and on the front of the combustion chamber in the area of the burner by pulling in additional dividing walls Helmholtz resonators 48 and 56 are formed, the constrictions 50 and 58 in connection with the combustion chamber stand, but are otherwise completely completed, so that a Flow of cooling air through the resonator rooms does not take place.
- the task is thereby in a combustion chamber of the type mentioned solved that at least in a partial area on the outside of the inner walls one spaced from the inner walls, substantially parallel to the inner walls extending perforated plate is arranged, which together with the associated Inner wall forms a closed damping volume that the inner walls in the region of the damping volume, a plurality of distributed ones has first openings through which the damping volume with the
- the combustion zone of the combustion chamber communicates with the perforated plate has a plurality of distributed second openings through which Cooling air flows into the damping volume from the outside and acts like a Impact cooling between the first openings on the opposite outside the inner wall hits, and that the distance between the perforated plate and the inner wall and the geometric dimensions of the first openings so are chosen so that the first openings together with the damping volume form a plurality of interconnected Helmholtz resonators and as a silencer for acoustic vibrations in the combustion chamber Act.
- the essence of the invention is a plurality of interconnected Helmholtz resonators by arranging two parallel ones To create perforated plates.
- the one perforated plate, the relatively large openings At the same time, the damping tubes of the individual resonators form the inner wall of the Combustion chamber itself.
- the other, outside perforated plate bounds together with the inner wall the intervening, interconnected damping volumes of the individual resonators.
- the relatively small openings on the outside Perforated plate is flowed through by cooling air, which on the one hand the resonators stabilized thermally and frequency and on the other hand by impact highly effective impingement cooling of the inner wall on the outside of the inner wall enables.
- the additional effort to create the resonators exists in doing so - when the large openings in the Inner wall already exist - just from attaching the outer one Perforated plate.
- a first preferred embodiment of the combustion chamber according to the invention is characterized in that the geometric dimensions of each first openings and the periodic intervals between the first openings are chosen essentially the same.
- the individual partial resonators are in this case, all tuned to the same damping frequency, so that for the damping arrangement overall a high damping in a relative results in a narrow frequency range.
- a second preferred embodiment of the combustion chamber according to the invention is characterized in that the geometric dimensions of each first openings and / or the distance between the perforated plate and the inner wall in the Area of the individual first openings and / or the periodic spacing of the individual first openings with each other to produce a widened Damping frequency band selected differently within a range of values become.
- the distribution of values for the individual partial resonators means that the overall arrangement of the frequency range in which a noticeable attenuation takes place, significantly broadened, which is advantageous when the combustion chamber vibrations scatter more in frequency.
- the first openings For common frequency values of combustion chamber vibrations in the range of several kHz are the first openings as through holes with a length of a few millimeters and a diameter of a few millimeters.
- the periodic distance between adjacent first openings is a few millimeters, and the distance of the perforated plate from the inner wall is also a few millimeters.
- the length of the first openings is about 5 mm, the Diameter of the first openings about 4.3 mm, the periodic spacing of the first openings between each other about 10 mm, and the distance between the Perforated plate and the inner wall about 5 mm.
- the second openings are chosen so small that there is sufficient Pressure drop for the cooling air flowing through results.
- the diameter is preferred the second openings are smaller than 1 mm, in particular approximately 0.7 mm.
- the damping behavior is particularly advantageous if according to another Embodiment the combustion chamber is designed as a secondary combustion chamber, if the combustion chamber is in the combustion zone and an upstream Inflow zone is divided when the inflow zone is in a step-like manner Transition to the combustion zone expanded when the combustion zone in the Area of the step-like transition delimited by a radial inner wall and when the perforated plate is arranged on the outside of the radial inner wall is.
- a secondary combustion chamber is shown in a simplified longitudinal section, which is known from EP-A1 0 669 500, and which is preferred for implementation the invention is suitable.
- the combustion chamber 10 includes a combustion zone 23, which of an inner wall extending in the axial direction 12 and a radial inner wall 17 is limited.
- the inflow zone 20 is delimited by an inner wall 15. Protrudes into the inflow zone 20 a fuel lance 18 from the side, a nozzle at the front end 19 for fuel injection.
- the inner walls 12, 15 and 17 are from an outer wall 11 extending in the axial direction.
- a cooling air duct 14 remains free, through what cooling air against the flow direction of the hot gases in between the inner wall 15 and the outer wall 11 formed extended space 16 streams.
- the inner wall 12 is convectively cooled by the cooling air.
- the cooling air flows from the space 16 through openings 21 in the inner wall 15 in the inflow zone 20, and through openings 22 in the inner wall 17 into the combustion zone 23, and thereby effects effusion cooling.
- a Helmholtz resonator arrangement can be integrated, which is simultaneously an effective Cooling of the inner wall 17 ensured.
- On the outside of the radial inner wall 17 is a perforated plate according to FIG. 2 at a distance (A in FIG. 3) 24 arranged in parallel, which together with the radial inner wall 17 Includes (annular) damping volume 26.
- the inner wall 17 has one A plurality of more or less regularly distributed openings 27 on the identical to the openings 22 for the effusion cooling in the combustion chamber 1 can be, but also different geometric dimensions can have.
- openings 27 each act as a damping tube of a Helmholtz partial resonator, which consists of the respective opening 27 and the underlying partial volume of the damping volume 26 is formed.
- the total damping volume 26 and the entirety of the openings 27 can be understood as individual Helmholtz resonators, their individual damping volumes are interconnected to form the damping volume 26.
- the perforated plate 24 has two more besides the limitation of the damping volume important tasks.
- the openings 25 provided in the perforated plate 24 allow cooling air to flow into the damping volume 26 from the space 16.
- the incoming cooling air cools the Helmholtz resonator arrangement.
- the openings 25 are relative to the openings 27 offset or arranged "on gap". This hits the damping volume 26 incoming cooling air to the openings 25 opposite Outside of the inner wall 17, which leads to effective impingement cooling of the inner wall 17 leads.
- the diameter D2 of the openings 25 (FIG. 3) is opposite the diameter D1 is comparatively small. This ensures that the cooling air flowing through suffers a sufficient pressure drop.
- the resonance frequency of the resonator arrangement or the partial resonators is in the essentially by the distance A, the thickness B of the inner wall 17 or the length of the openings 27, the diameter of the openings 27 and the periodic Distance L (Fig. 3) of the openings 27 determined.
- the openings 27 are through holes with a length B of a few millimeters and a diameter D1 of a few Millimeters trained.
- the periodic distance L between neighboring ones Openings 27 is a few millimeters, and the distance A of the perforated plate 24 of the inner wall 17 is also a few millimeters.
- FIGS. 4 and 5 The damping behavior of the individual for the values from the table Partial resonators is shown in FIGS. 4 and 5.
- Fig. 4 shows the relative attenuation power over frequency.
- Fig. 5 shows the displacement amplitude in the damping tube (Opening 27) above the frequency. one can see that both curves are pronounced Have maximum at the desired frequency of 5500 Hz.
- the resonator arrangement according to FIGS. 2 and 3 requires a cooling air flow that is large enough to withstand a heat-related deviation of the resonance frequency from the prevent constructively determined value. Such a cooling air flow is in everyone Case sufficient for cooling the inner wall 17.
- the damping capacity of the individual opening 27 is large enough to dampen the overall arrangement to extend to a wider frequency range. This can be done by a certain Scattering range for the values A, B, D1 and L can be chosen to be different Realize resonance frequencies of the individual partial resonators.
- the length of the Openings 25 are not as important as the pressure drop across them Openings are sufficiently large.
- the invention results in a combustion chamber which, with good acoustic Damping ensures efficient cooling of the inner walls and at the same time can be made compact. It goes without saying that the Helmholtz resonator arrangement in the context of the invention also on others Place of the inner walls can be arranged.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
- Fig. 1
- im vereinfachten Längsschnitt eine Sekundärbrennkammer, wie sie aus dem Stand der Technik, insbesondere der EP-A1 0 669 500, bekannt ist;
- Fig. 2
- einen vergrösserten Ausschnitt der Brennkammer nach Fig. 1 im Bereich des stufenartigen Uebergangs zwischen Zuströmzone und Verbrennungszone mit einer integrierten Helmholtzresonator-Anordnung gemäss einem bevorzugten Ausführungsbeispiel der Erfindung;
- Fig. 3
- in einer perspektivischen, vergrösserten Darstellung die Helmholtzresonator-Anordnung aus Fig. 2 mit den beiden parallelen Lochplatten;
- Fig. 4
- eine beispielhafte Dämpfungskurve für einen der Teilresonatoren aus der Anordnung nach Fig. 3; und
- Fig. 5
- der zu Fig. 4 gehörende Frequenzgang der Verschiebungsamplitude im Dämpfungsrohr (Oeffnung 27) eines Teilresonators aus Fig. 3.
Kühlluft | ||
Druck | 16,6 | bar |
Temperatur | 770 | K |
Dichte | 7,51 | kg/m3 |
Schallgeschwindigkeit | 556,22 | m/s |
kinematische Viskosität | 4,71.10-6 | m2/s |
Heissgas in der Brennkammer | ||
Temperatur | 1740 | K |
Dichte | 3,32 | kg/m3 |
Schallgeschwindigkeit | 836,14 | m/s |
Brennkammer | ||
Druckschwingungsamplitude | 100 | mbar |
Querschnittsfläche | 0,0863 | m2 |
akustische Leistung der Wanderwelle | 388 | W |
Dämpfer | ||
Resonanzfrequenz | 5500 | Hz |
Volumen eines Teilresonators | 0,0005 | Liter |
Länge (B) des Dämpfungsrohres 27 | 0,005 | m |
Strömungsgeschwindigkeit im Rohr 27 | 4 | m/s |
Länge der Oeffnung 25 | 0,005 | m |
Durchmesser D2 der Oeffnung 25 | 0,7 | mm |
Durchmesser D1 des Dämpfungsrohres27 | 4,32 | mm |
periodischer Lochabstand L | 10 | mm |
- 10
- Sekundärbrennkammer
- 11
- Aussenwand
- 12
- Innenwand (Verbrennungszone)
- 13
- Heissgasauslass
- 14
- Kühlluftkanal
- 15
- Innenwand (Zuströmzone)
- 16
- Zwischenraum
- 17
- radiale Innenwand
- 18
- Brennstofflanze
- 19
- Düse (Brennstofflanze)
- 20
- Zuströmzone
- 21
- Oeffnung (Wand 15)
- 22,27
- Oeffnung (Wand 17)
- 23
- Verbrennungazone
- 24
- Lochplatte
- 25
- Einlassöffnung
- 26
- Dämpfungsvolumen
- A
- Abstand
- B
- Dicke (Innenwand)
- D1,D2
- Durchmesser
- L
- periodischer Lochabstand
Claims (7)
- Brennkammer (10) für eine Gasturbine, in welcher Brennkammer (10) die heissen Verbrennungsgase einer Verbrennungszone (23) durch Innenwände (12, 17) umschlossen werden, welche durch ausserhalb der Innenwände (12, 17) herangeführte Kühlluft gekühlt werden, dadurch gekennzeichnet, dass zumindest in einem Teilbereich an der Aussenseite der Innenwände (12, 17) eine von den Innenwänden (12, 17) beabstandete, im wesentlichen parallel zu den Innenwänden (12, 17) verlaufende Lochplatte (24) angeordnet ist, welche zusammen mit der zugehörigen Innenwand (17) ein geschlossenes Dämpfungsvolumen (26) bildet, dass die Innenwände (17) im Bereich des Dämpfungsvolumens (26) eine Mehrzahl von verteilt angeordneten ersten Oeffnungen (27) aufweist, durch welche das Dämpfungsvolumen (26) mit der Verbrennungszone (23) der Brennkammer (10) in Verbindung steht, dass die Lochplatte (24) eine Mehrzahl von verteilt angeordneten zweiten Oeffnungen (25) aufweist, durch welche Kühlluft von aussen in das Dämpfungsvolumen (26) einströmt und nach Art einer Prallkühlung zwischen den ersten Oeffnungen (27) auf die gegenüberliegende Aussenseite der Innenwand (17) trifft, und dass der Abstand (A) zwischen der Lochplatte (24) und der Innenwand (12) und die geometrischen Abmessungen (B, D1, L) der ersten Oeffnungen (27) so gewählt sind, dass die ersten Oeffnungen (27) zusammen mit den Dämpfungsvolumen (26) eine Mehrzahl von untereinander verbundenen Helmholtzresonatoren bilden und als Schalldämpfer für in der Brennkammer entstehende akustische Schwingungen wirken.
- Brennkammer nach Anspruch 1, dadurch gekennzeichnet, dass die geometrischen Abmessungen (B, D1) der einzelnen ersten Oeffnungen (27) und die Abstände (L) der ersten Oeffnungen (27) untereinander im wesentlichen gleich gewählt sind.
- Brennkammer nach Anspruch 1, dadurch gekennzeichnet, dass die geometrischen Abmessungen (B, D1) der einzelnen ersten Oeffnungen (27) und/oder der Abstand zwischen Lochplatte (24) und Innenwand (17) im Bereich der einzelnen ersten Oeffnungen (27) und/oder der periodische Abstand (L) der einzelnen ersten Oeffnungen (27) untereinander zur Erzeugung eines verbreiterten Dämpfungsfrequenzbandes innerhalb eines Wertebereiches unterschiedlich gewählt werden.
- Brennkammer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zur Dämpfung von Frequenzen im Bereich von mehreren kHz die ersten Oeffnungen (27) als Durchgangsbohrungen mit einer Länge (B) von wenigen Millimetern und einem Durchmesser (D1) von wenigen Millimetern ausgebildet sind, dass der periodische Abstand (L) zwischen benachbarten ersten Oeffnungen (27) wenige Millimeter beträgt, und dass der Abstand (A) der Lochplatte (24) von der Innenwand (17) ebenfalls wenige Millimeter beträgt.
- Brennkammer nach Anspruch 4, dadurch gekennzeichnet, dass zur Dämpfung von Frequenzen von etwa 5500 Hz die Länge (B) der ersten Oeffnungen (27) etwa 5 mm, der Durchmesser (D1) der ersten Oeffnungen (27) etwa 4,3 mm, der periodische Abstand (L) der ersten Oeffnungen (27) untereinander etwa 10 mm, und der Abstand (A) zwischen der Lochplatte (24) und der Innenwand (17) etwa 5 mm betragen.
- Brennkammer nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, dass der Durchmesser (D2) der zweiten Oeffnungen kleiner als 1 mm, insbesondere etwa 0,7 mm, ist.
- Brennkammer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Brennkammer (10) als Sekundärbrennkammer ausgebildet ist, dass die Brennkammer (10) in die Verbrennungszone (23) und eine stromaufwärts angeordnete Zuströmzone (20) unterteilt ist, dass die Zuströmzone (20) sich in einem stufenartigen Uebergang zur Verbrennungszone (23) erweitert, dass die Verbrennungszone (23) im Bereich des stufenartigen Uebergangs durch eine radiale Innenwand (17) begrenzt wird, und dass die Lochplatte (24) an der Aussenseite der radialen Innenwand (17) angeordnet ist.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98810656A EP0971172B1 (de) | 1998-07-10 | 1998-07-10 | Brennkammer für eine Gasturbine mit schalldämpfender Wandstruktur |
DE59810343T DE59810343D1 (de) | 1998-07-10 | 1998-07-10 | Brennkammer für eine Gasturbine mit schalldämpfender Wandstruktur |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98810656A EP0971172B1 (de) | 1998-07-10 | 1998-07-10 | Brennkammer für eine Gasturbine mit schalldämpfender Wandstruktur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0971172A1 true EP0971172A1 (de) | 2000-01-12 |
EP0971172B1 EP0971172B1 (de) | 2003-12-03 |
Family
ID=8236187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810656A Expired - Lifetime EP0971172B1 (de) | 1998-07-10 | 1998-07-10 | Brennkammer für eine Gasturbine mit schalldämpfender Wandstruktur |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0971172B1 (de) |
DE (1) | DE59810343D1 (de) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6351947B1 (en) * | 2000-04-04 | 2002-03-05 | Abb Alstom Power (Schweiz) | Combustion chamber for a gas turbine |
EP1221574A2 (de) * | 2001-01-09 | 2002-07-10 | Mitsubishi Heavy Industries, Ltd. | Gasturbinenbrennkammer |
EP1342953A1 (de) * | 2002-03-07 | 2003-09-10 | Siemens Aktiengesellschaft | Gasturbine |
GB2390150A (en) * | 2002-06-26 | 2003-12-31 | Alstom | Reheat combustion system for a gas turbine including an accoustic screen |
WO2004079264A1 (de) * | 2003-03-07 | 2004-09-16 | Alstom Technology Ltd | Vormischbrenner |
WO2004101975A1 (de) * | 2003-05-15 | 2004-11-25 | Alstom Technology Ltd | Vorrichtung zur schalldämpfung in einem strömungskanal |
US6964170B2 (en) | 2003-04-28 | 2005-11-15 | Pratt & Whitney Canada Corp. | Noise reducing combustor |
DE102006026969A1 (de) * | 2006-06-09 | 2007-12-13 | Rolls-Royce Deutschland Ltd & Co Kg | Gasturbinenbrennkammerwand für eine mager-brennende Gasturbinenbrennkammer |
US7549290B2 (en) | 2004-11-24 | 2009-06-23 | Rolls-Royce Plc | Acoustic damper |
EP2273196A2 (de) | 2009-07-08 | 2011-01-12 | Rolls-Royce Deutschland Ltd & Co KG | Brennkammerkopf einer Gasturbine |
WO2014151045A1 (en) | 2013-03-15 | 2014-09-25 | President And Fellows Of Harvard College | Low porosity auxetic sheet |
US9022726B2 (en) | 2010-06-25 | 2015-05-05 | Alstom Technology Ltd | Thermally loaded, cooled component |
JP2016520784A (ja) * | 2013-03-15 | 2016-07-14 | プレジデント アンド フェローズ オブ ハーバード カレッジ | 繰り返しの細長い開口パターンを有するボイド構造 |
WO2016112366A1 (en) | 2015-01-09 | 2016-07-14 | President And Fellows Of Harvard College | Negative poisson's ratio waffle structures |
US10603866B2 (en) | 2015-01-09 | 2020-03-31 | President And Fellows Of Harvard College | Hybrid dimple-and-void auxetic structures with engineered patterns for customized NPR behavior |
JPWO2019021483A1 (ja) * | 2017-07-28 | 2020-05-28 | イビデン株式会社 | 吸音部材、車両用部品及び自動車 |
US10843505B2 (en) | 2015-01-09 | 2020-11-24 | President And Fellows Of Harvard College | Zero-porosity NPR structure and tuning of NPR structure for particular localities |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2559942A1 (de) | 2011-08-19 | 2013-02-20 | Rolls-Royce Deutschland Ltd & Co KG | Brennkammerkopf einer Gasturbine mit Kühlung und Dämpfung |
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Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
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US6351947B1 (en) * | 2000-04-04 | 2002-03-05 | Abb Alstom Power (Schweiz) | Combustion chamber for a gas turbine |
US6907736B2 (en) | 2001-01-09 | 2005-06-21 | Mitsubishi Heavy Industries, Ltd. | Gas turbine combustor having an acoustic energy absorbing wall |
EP1221574A2 (de) * | 2001-01-09 | 2002-07-10 | Mitsubishi Heavy Industries, Ltd. | Gasturbinenbrennkammer |
EP1221574A3 (de) * | 2001-01-09 | 2003-04-02 | Mitsubishi Heavy Industries, Ltd. | Gasturbinenbrennkammer |
WO2003074936A1 (de) * | 2002-03-07 | 2003-09-12 | Siemens Aktiengesellschaft | Gasturbine |
CN1320314C (zh) * | 2002-03-07 | 2007-06-06 | 西门子公司 | 燃气轮机 |
US7246493B2 (en) | 2002-03-07 | 2007-07-24 | Siemens Aktiengesellschaft | Gas turbine |
EP1342953A1 (de) * | 2002-03-07 | 2003-09-10 | Siemens Aktiengesellschaft | Gasturbine |
GB2390150A (en) * | 2002-06-26 | 2003-12-31 | Alstom | Reheat combustion system for a gas turbine including an accoustic screen |
US6981358B2 (en) | 2002-06-26 | 2006-01-03 | Alstom Technology Ltd. | Reheat combustion system for a gas turbine |
WO2004079264A1 (de) * | 2003-03-07 | 2004-09-16 | Alstom Technology Ltd | Vormischbrenner |
US6964170B2 (en) | 2003-04-28 | 2005-11-15 | Pratt & Whitney Canada Corp. | Noise reducing combustor |
WO2004101975A1 (de) * | 2003-05-15 | 2004-11-25 | Alstom Technology Ltd | Vorrichtung zur schalldämpfung in einem strömungskanal |
US7913936B2 (en) | 2003-05-15 | 2011-03-29 | Alstom Technology Ltd | Device for sound attenuation in a flow duct |
US7549290B2 (en) | 2004-11-24 | 2009-06-23 | Rolls-Royce Plc | Acoustic damper |
DE102006026969A1 (de) * | 2006-06-09 | 2007-12-13 | Rolls-Royce Deutschland Ltd & Co Kg | Gasturbinenbrennkammerwand für eine mager-brennende Gasturbinenbrennkammer |
US7926278B2 (en) | 2006-06-09 | 2011-04-19 | Rolls-Royce Deutschland Ltd & Co Kg | Gas-turbine combustion chamber wall for a lean-burning gas-turbine combustion chamber |
DE102009032277A1 (de) | 2009-07-08 | 2011-01-20 | Rolls-Royce Deutschland Ltd & Co Kg | Brennkammerkopf einer Gasturbine |
US8677757B2 (en) | 2009-07-08 | 2014-03-25 | Rolls-Royce Deutschland Ltd & Co Kg | Combustion chamber head of a gas turbine |
EP2273196A2 (de) | 2009-07-08 | 2011-01-12 | Rolls-Royce Deutschland Ltd & Co KG | Brennkammerkopf einer Gasturbine |
US9022726B2 (en) | 2010-06-25 | 2015-05-05 | Alstom Technology Ltd | Thermally loaded, cooled component |
EP2400115B1 (de) * | 2010-06-25 | 2019-05-29 | Ansaldo Energia Switzerland AG | Wärmebelastetes, Gekühltes Bauteil |
US10823409B2 (en) | 2013-03-15 | 2020-11-03 | President And Fellows Of Harvard College | Void structures with repeating elongated-aperture pattern |
WO2014151045A1 (en) | 2013-03-15 | 2014-09-25 | President And Fellows Of Harvard College | Low porosity auxetic sheet |
JP2016514781A (ja) * | 2013-03-15 | 2016-05-23 | プレジデント アンド フェローズ オブ ハーバード カレッジ | 低孔隙率オーゼティックシート |
JP2016520784A (ja) * | 2013-03-15 | 2016-07-14 | プレジデント アンド フェローズ オブ ハーバード カレッジ | 繰り返しの細長い開口パターンを有するボイド構造 |
WO2016112366A1 (en) | 2015-01-09 | 2016-07-14 | President And Fellows Of Harvard College | Negative poisson's ratio waffle structures |
US10611118B2 (en) | 2015-01-09 | 2020-04-07 | President And Fellows Of Harvard College | Negative poisson's ratio waffle structures |
US10603866B2 (en) | 2015-01-09 | 2020-03-31 | President And Fellows Of Harvard College | Hybrid dimple-and-void auxetic structures with engineered patterns for customized NPR behavior |
US10843505B2 (en) | 2015-01-09 | 2020-11-24 | President And Fellows Of Harvard College | Zero-porosity NPR structure and tuning of NPR structure for particular localities |
JPWO2019021483A1 (ja) * | 2017-07-28 | 2020-05-28 | イビデン株式会社 | 吸音部材、車両用部品及び自動車 |
EP3660834A4 (de) * | 2017-07-28 | 2021-03-10 | Ibiden Co., Ltd | Schallabsorptionsglied, fahrzeugkomponente und kraftfahrzeug |
Also Published As
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DE59810343D1 (de) | 2004-01-15 |
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