EP2417394A2 - Brennkammer mit helmholtzdämpfer - Google Patents
Brennkammer mit helmholtzdämpferInfo
- Publication number
- EP2417394A2 EP2417394A2 EP10714236A EP10714236A EP2417394A2 EP 2417394 A2 EP2417394 A2 EP 2417394A2 EP 10714236 A EP10714236 A EP 10714236A EP 10714236 A EP10714236 A EP 10714236A EP 2417394 A2 EP2417394 A2 EP 2417394A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- helmholtz damper
- burners
- chamber according
- helmholtz
- 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 77
- 238000013016 damping Methods 0.000 claims abstract description 45
- 238000009434 installation Methods 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 description 8
- 239000002826 coolant Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- 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 a combustion chamber according to the preamble of claim 1.
- thermoacoustic oscillations in frequency and amplitude are influenced by a variety of geometric and operating parameters of the combustion chamber, the expected vibrations can be predicted very difficult and incomplete in a new combustion chamber. It may therefore be that the Helmholtz damper used on the combustion chamber are not optimally adapted to the vibrations actually occurring in the combustion chamber, especially if this combustion chamber have to cover wide operating behavior.
- the publication EP 02 782 607.2 has become known from the prior art, which shows how a Helmholtz damper is installed in a combustion chamber.
- the final purpose here is to form the Helmholtz damper such that its damping frequency is adjustable, and in particular is designed to be continuously adjustable.
- the damping can be easily adapted to the thermoacoustic behavior of the combustion chamber and optimized accordingly.
- An exchange of parts or entire dampers is not required, so that can be dispensed with corresponding large-sized access options.
- the adjustability of the Helmholtz damper the need for different resonant frequencies differently configured damper or damper parts manufacture and ready.
- Helmholtz dampers are related to a combustion chamber of a gas turbine, which is operated with Vormischbrennern the newer generation.
- These Helmholtz damper are provided on the inlet side of the combustion chamber, which is formed for example with two rings of premix burners and arranged therebetween, adjustable Helmholtz damper.
- the gas turbine itself is enclosed by a gas turbine housing within which is a plenum filled with compressed air.
- the plenum surrounds the combustion chamber, which is separated from the plenum by a combustion chamber housing.
- the arrangement of the combustion chamber within the gas turbine is essentially the same as described in the aforementioned document EP-A1 -0 597 138.
- the combustion chamber is separated on the inlet side by a front cover.
- the combustion chamber is further ring-shaped and equipped with said Vormischbrennern, as shown for example in the basic protection rights EP-O 321 809 A1 or EP-O 704 657 A1, and in the following developments, all references here an integrating Form part of this application.
- the premix burners are arranged in corresponding openings in the front cover and open into the combustion chamber.
- Helmholtz dampers are provided between the burners. These Helmholtz damper each have a damping volume, which is composed of a fixed cylindrical and a variable cylindrical damping volume.
- the damping volume is connected to the combustion chamber via a comparatively narrow connection channel.
- the arrangement of connecting channel and damping volume forms a damping resonator whose resonant frequency is determined inter alia by the size of the damping volume.
- the invention aims to remedy this situation.
- the invention as characterized in the claims, the object is to design the execution of a Helmholtz damper of the type mentioned so that it can be used without fundamental modifications to the combustion chamber as needed, place and number manifold, and on the respective damping to be achieved provides a simple adjustment.
- the Helmholtz damper designed according to the invention can be used instead of a remotely located premix burner of the known type.
- premix burners due to the progress in premix combustion in the annular combustion chamber, premix burners can now be used whose number for the same power is less than the number of premix burners originally provided, so that some burner positions are no longer needed in such repowering of the annular combustion chamber and therefore the vacant position is also available.
- Another advantage of the invention lies in the fact that the exact arrangement of the Helmholtz damper can be optimized by means of a previously carried out thermoacoustic simulation, bearing in mind that now sufficient Einstellvariationen are available, so that in the installation of such a Helmholtz damper not in any form is limited, neither in terms of the number, nor the position to be assigned within a composite of Vormischbrennern. Accordingly, these Helmholtz damper can be easily installed in the places where they also maximized Give damping effect, because if incorrectly positioning only a single Helmholtz damper, it may easily happen that overall no satisfactory effect is achieved.
- Another advantage of the invention lies in the fact that the predetermined space conditions can be optimally utilized by a maximum damping volume by proposing the Helmholtz damper according to the invention not to provide the tuning tube upstream, as is usually the case, but to project deep into the damping volume , which has a positive effect on the space available for installation.
- Another advantage of the invention is the fact that measures against the thermal load acting there is remedied on the exposed positioning of the Helmholtz damper. These measures consist of initially providing efficient impingement cooling, which cools the front surface of the Helmholtz damper.
- the Helmholtz damper is equipped with a special transition piece with radial air supply holes through which the cooling medium is supplied.
- Another significant advantage of the invention is the fact that the Helmholtz damper for adjusting the frequency directly from the outside, without removal or removal of any covers, is fully accessible.
- a further advantage of the invention is that the Helmholtz damper is designed to not only have axial flexibility within the combustion chamber in relation to the other various components, but also to provide lateral compliance, so that there is a space constraint is not given during installation, and otherwise behaves compliant during operation.
- FIG. 2 shows the installation of a Helmholtz damper according to the invention instead of a premix burner
- FIG. 3 shows the installation of a Helmholtz damper according to the invention between two premix burners
- FIG. 5 shows a section through the rear part of an inventive Helmholtz damper.
- Fig. 1 is in a section in cross section, the inlet side of the combustion chamber of a gas turbine with, as already mentioned above, two rings of double-cone burners and an interposed, adjustable Helmholtz damper according to a belonging to the prior art design.
- the gas turbine 10 is enclosed by a gas turbine housing 11 within which a filled with compressed air plenum 12 is located.
- the plenum 12 surrounds the combustion chamber 16, which is separated from the plenum 12 by a combustion chamber housing 13.
- the arrangement of the combustion chamber 16 within the gas turbine 10 is substantially the same as described in the aforementioned document EP-A1 -0 597 138.
- the combustion chamber 16 is bounded on the inlet side by a front cover 26.
- the combustion chamber 16 is annular and is equipped with so-called premix burners 14, 15, which are known by the applicant as EV burners or AEV burners, and are well known in the art, and are arranged in rings around the axis of the gas turbine, such as this is disclosed in EP-A1-0 597 138 or in EP 0 976 982 B1, in particular Fig. 2.
- the premix burners 14, 15 are arranged in corresponding openings in the front cover 20 and open into the combustion chamber 16.
- Helmholtz dampers 17 are provided between the rings with the burners 14, 15. These Helmholtz damper 17 have a damping volume that is composed of a fixed cylindrical and a variable cylindrical damping volume.
- the damping volume is connected to the combustion chamber 16 via a comparatively narrow connection channel 18.
- the arrangement of connecting channel 18 and damping volume forms a damping resonator whose resonant frequency is determined inter alia by the size of the damping volume, said connecting channel 18 is directly connected to the combustion chamber in communication.
- the installation of such a Helmholtz damper requires a previous specific installation structure, which leads to a fixed positioning of the Helmholtz damper.
- FIG. 2 shows an identical output configuration of the combustion chamber 16 as in FIG. 1.
- the original premix burner 15 from FIG. 1 is replaced by a Helmholtz damper 30 according to the invention.
- This Helmholtz damper 30 is designed so that it can therefore be replaced with a premix burner.
- the Helmholtz damper 30 and in the front plate already existing there can be radially guided and axially freely installed, so that such an installation does not require any special mounting structure.
- this Helmholtz damper 30 is discussed in more detail in the description of FIGS. 4 and 5.
- the Helmholtz damper 30 thanks to its slender held embodiment, even within the annular combustion chamber between two Vormischbrennern 14, 15 install, so wherever a previously made thermoacoustic simulation provides appropriate information.
- Such a configuration thus allows maximum flexibility in the positioning of the Helmholtz damper 30 within a composite of premix burners, the same also applies if diffusion burners should be provided instead of premix burners.
- the insertion of the Helmholtz damper and its frequency setting can then be made readily from the outside, if a corresponding opening is provided in the gas turbine housing 1 1, as indicated in FIG. 3.
- an individual regulation of the Helmholtz damper 30 can be accomplished from the outside.
- the anchoring for the Helmholtz damper 30 can be achieved, for example, by utilizing the already existing suspension structure of the premix burner.
- FIG. 4 shows the front part 30a of the installed Helmholtz damper 30, in which it can be seen that a tuning tube 31 is arranged on the inside.
- the length of such a tuning tube 31, which is so important for the effect can be designed to be very flexible, since the available space within the tube length 30a is large, so that the tuning tube 31 does not have to be stored as usual, but rather deep inside Damping volume 35 can protrude.
- the cooling medium 33 itself flows through a transition piece 34 and through radial or quasi-radial openings 33a mounted there into the interior of the damping volume 35.
- the thermally consumed cooling medium then flows from the front side of the front surface 32, as can be seen from the illustrations in FIGS. 2 and 3.
- the damping volume 35 is selected so that the damping frequency that can be achieved in the vicinity of the frequency of one of the expected in the combustion chamber thermoacoustic oscillations.
- a tuning tube 31 The envisaged by the construction described in detail implementation of a tuning tube 31 is achieved that is possible by the design of this tuning tube 31, both in terms of its diameter, its wall thickness, as well as its length, in a newly put into operation gas turbine Helmholtz damper 30th to tune exactly to the occurring vibration frequencies and thus obtain the lowest possible means optimal damping.
- the optimal installation position can be determined by a previously performed thermoacoustic simulation. However, this option is only possible if the installation specifications regarding a Helmholtz damper 30 according to FIGS. 2 and 3 are also to be fulfilled.
- thermoacoustic simulation on the one hand, therefore, a finer tuning against thermoacoustic vibrations can be achieved by the proposed construction.
- These adjustments which can be implemented individually or in combinations with one another, make it possible to cover a wide variety of oscillation frequencies by a single embodiment of a Helmholtz damper 30, thereby avoiding the need to use differently dimensioned Helmholtz dampers for damping different oscillation frequencies.
- Fig. 5 shows the rear portion 30b of the Helmholtz damper 30, which is therefore pointed to two other advantages of the system.
- a possible adjustment of the damping volume 35 is additionally provided in this case in that this adjustment is configured in particular so that it can be carried out in the installed state of the Helmholtz damper 30, as shown in FIGS. 2 and 3.
- the end-side damping volume 35 is provided with a mecanicbüchse 36, which the end-side storage and management of a Piston rod 37 is used.
- this piston rod 37 is connected to an adjusting piston 38 which detects the clear width of the damping volume 35.
- the displaceability of the adjusting piston 38 which causes a change in volume of the active damping volume 35, is achieved by the displacement of said piston rod 37 in operative connection with an adjustable compression fitting 39 or by other means.
- an additional component is provided which on the one hand can be applied to the turbine housing without extensive provisions, and on the other hand allows an immediate fine adjustment of the active damping volume as needed, especially when it comes to the damping behavior in transient load areas of the gas turbine, in which a damping correction against unforeseen thermoacoustic vibrations in the combustion chamber is necessary.
- the Helmholtz damper 30 has a lateral adjustment, which proves to be extremely advantageous during installation or operation.
- an apparent in FIGS. 2 and 3 flange 40 is provided, which ensures that a fixed point recording 41 of the Helmholtz damper 30 is given.
- This intermediate flange 40 is in direct operative connection with an outer shell 42 of the Helmholtz damper 30.
- the inclusion of lateral strains in operative connection with an approximately placed in the longitudinal center of the Helmholtz damper 30 adjusting piston 43 is ensured.
- the intermediate flange 40 is arranged in the region of the front part of the combustion chamber housing 13 and anchored there, as apparent from FIGS. 2 and 3.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00596/09A CH700799A1 (de) | 2009-04-11 | 2009-04-11 | Brennkammer mit Helmholtzdämpfer für eine Gasturbine. |
PCT/EP2010/054701 WO2010115980A2 (de) | 2009-04-11 | 2010-04-09 | Brennkammer mit helmholtzdämpfer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2417394A2 true EP2417394A2 (de) | 2012-02-15 |
EP2417394B1 EP2417394B1 (de) | 2017-12-20 |
Family
ID=40578473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10714236.6A Active EP2417394B1 (de) | 2009-04-11 | 2010-04-09 | Brennkammer mit helmholtzdämpfer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2417394B1 (de) |
AU (1) | AU2010233724B2 (de) |
CH (1) | CH700799A1 (de) |
MY (1) | MY160094A (de) |
WO (1) | WO2010115980A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10197275B2 (en) | 2016-05-03 | 2019-02-05 | General Electric Company | High frequency acoustic damper for combustor liners |
US10513984B2 (en) | 2015-08-25 | 2019-12-24 | General Electric Company | System for suppressing acoustic noise within a gas turbine combustor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH702594A1 (de) * | 2010-01-28 | 2011-07-29 | Alstom Technology Ltd | Helmholtzdämpfer für den Einbau in die Brennkammer einer Gasturbine sowie Verfahren zum Einbau eines solchen Helmholtzdämpfers. |
WO2015022222A1 (de) * | 2013-08-15 | 2015-02-19 | Siemens Aktiengesellschaft | Hitzeschild mit mindestens einem helmholtzresonator |
EP2848865A1 (de) | 2013-09-12 | 2015-03-18 | Alstom Technology Ltd | Thermoakustisches Stabilisierungsverfahren |
US10221769B2 (en) * | 2016-12-02 | 2019-03-05 | General Electric Company | System and apparatus for gas turbine combustor inner cap and extended resonating tubes |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH674561A5 (de) | 1987-12-21 | 1990-06-15 | Bbc Brown Boveri & Cie | |
EP0597138B1 (de) * | 1992-11-09 | 1997-07-16 | Asea Brown Boveri AG | Gasturbinen-Brennkammer |
DE4435266A1 (de) | 1994-10-01 | 1996-04-04 | Abb Management Ag | Brenner |
DE59810344D1 (de) | 1998-07-27 | 2004-01-15 | Alstom Switzerland Ltd | Verfahren zum Betrieb einer Gasturbinenbrennkammer mit gasförmigem Brennstoff |
DE10058688B4 (de) * | 2000-11-25 | 2011-08-11 | Alstom Technology Ltd. | Dämpferanordnung zur Reduktion von Brennkammerpulsationen |
EP1476699B1 (de) * | 2002-01-16 | 2013-11-13 | Alstom Technology Ltd | Brennkammer und dämpferanordnung zur reduzierung von brennkammerpulsationen in einer gasturbinenanlage |
EP1605209B1 (de) * | 2004-06-07 | 2010-08-04 | Siemens Aktiengesellschaft | Brennkammer mit einer Dämpfungseinrichtung zur Dämpfung von thermoakustischen Schwingungen |
DE102005062284B4 (de) * | 2005-12-24 | 2019-02-28 | Ansaldo Energia Ip Uk Limited | Brennkammer für eine Gasturbine |
-
2009
- 2009-04-11 CH CH00596/09A patent/CH700799A1/de not_active Application Discontinuation
-
2010
- 2010-04-09 EP EP10714236.6A patent/EP2417394B1/de active Active
- 2010-04-09 AU AU2010233724A patent/AU2010233724B2/en not_active Ceased
- 2010-04-09 MY MYPI2011004855A patent/MY160094A/en unknown
- 2010-04-09 WO PCT/EP2010/054701 patent/WO2010115980A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010115980A2 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10513984B2 (en) | 2015-08-25 | 2019-12-24 | General Electric Company | System for suppressing acoustic noise within a gas turbine combustor |
US10197275B2 (en) | 2016-05-03 | 2019-02-05 | General Electric Company | High frequency acoustic damper for combustor liners |
Also Published As
Publication number | Publication date |
---|---|
CH700799A1 (de) | 2010-10-15 |
WO2010115980A3 (de) | 2011-10-20 |
MY160094A (en) | 2017-02-28 |
WO2010115980A2 (de) | 2010-10-14 |
AU2010233724B2 (en) | 2015-06-18 |
EP2417394B1 (de) | 2017-12-20 |
AU2010233724A1 (en) | 2011-11-03 |
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