EP2075506B1 - Reaction chamber cladding - Google Patents

Reaction chamber cladding Download PDF

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Publication number
EP2075506B1
EP2075506B1 EP08021918.1A EP08021918A EP2075506B1 EP 2075506 B1 EP2075506 B1 EP 2075506B1 EP 08021918 A EP08021918 A EP 08021918A EP 2075506 B1 EP2075506 B1 EP 2075506B1
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EP
European Patent Office
Prior art keywords
combustion chamber
ceramic
metallic
air
hollow
Prior art date
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Expired - Fee Related
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EP08021918.1A
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German (de)
French (fr)
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EP2075506A2 (en
EP2075506A3 (en
Inventor
Miklos Dr. Gerendas
Sermed Sadig
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Rolls Royce Deutschland Ltd and Co KG
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Rolls Royce Deutschland Ltd and Co KG
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Publication of EP2075506A3 publication Critical patent/EP2075506A3/en
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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
    • F23R3/002—Wall structures
    • 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
    • F23R3/007—Continuous combustion chambers using liquid or gaseous fuel constructed mainly of ceramic components
    • 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
    • F23R3/06—Arrangement of apertures along the flame tube
    • 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
    • F23R2900/03041—Effusion cooled combustion chamber walls or domes
    • 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
    • F23R2900/03042—Film cooled combustion chamber walls or domes
    • 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
    • F23R2900/03044—Impingement cooled combustion chamber walls or subassemblies

Definitions

  • the invention relates to a combustion chamber for a gas turbine according to the features of the preamble of claim 1.
  • the invention relates to a combustion chamber for a gas turbine with a metallic support structure and with a plurality of distributed circumferentially arranged ceramic hollow profiles, which are fixed to the support structure.
  • This prior art is from the DE 195 02 730 A1 previously known.
  • the DE 195 02 730 A1 describes the ceramic lining of a combustion chamber with at least one uncooled wall plate, which consists of high-temperature-resistant structural ceramic and which is connected by means of a fastening element resiliently to a holding device.
  • the bonding surface between the fastener and the ceramic is shaped to provide minimal thermal stress.
  • the disadvantage is that only a convective cooling of the metallic wall is possible, which requires a high cooling air mass flow.
  • the fastener rests on the side facing the hot gas side and is thus exposed to elevated thermal loads.
  • the EP 0 943 867 B1 describes the ceramic lining of a combustion chamber with individual juxtaposed segments in the form of hollow chambers, which can also serve for flow guidance.
  • the ceramic lining can be fixed on the side facing the metallic structure.
  • the cavity can also be provided for cooling guidance and thus achieves higher Heat transfer rates; but this cooling technology is limited only to a convective cooling of the ceramic wall element directed towards the internal combustion chamber. Furthermore, it is not apparent how a dosage of the cooling air takes place and also a control of the local cooling mass flows in the continuous cavity is considered difficult. Another disadvantage is that the entire axial length is made in one piece. The result is that kinks must be mitgefertigt in one piece.
  • the EP 1 431 661 A1 which forms the closest prior art, discloses a plurality of metallic tubular hollow profiles arranged on a support structure on the circumference of a combustion chamber, which are rectilinear and designed as individual segments.
  • a metallic hollow body which is flowed through by cooling air arranged. The resulting heat transfer of the metallic materials results in optimum cooling under all operating conditions.
  • the EP 1 271 056 A1 shows a gas turbine combustor with hollow elements of metallic or ceramic materials.
  • the invention has for its object to provide a combustion chamber of the type mentioned for a gas turbine, which With a simple structure and simple, reliable application is inexpensive to produce and avoids the disadvantages of the prior art.
  • the ceramic, tubular hollow profiles are each formed in a straight line and are arranged as individual segments.
  • a metallic hollow body is arranged, which is preferably formed in the form of a hollow box.
  • On at least one wall air passage openings are provided on the metallic hollow body, which may be formed in the form of a perforation. Through this air passage openings escapes cooling air, which is introduced into the metallic hollow body.
  • the metallic hollow body is preferably arranged to form a gap in the ceramic hollow profile, so that the cooling air flowing through the air passage openings can be distributed in the ceramic hollow profile.
  • the ceramic hollow profile is provided on its wall facing a combustion chamber with additional air passage openings.
  • the air passage openings (perforation) of the metallic hollow body are preferably formed on the combustion chamber interior facing wall to ensure effective cooling of the ceramic hollow profile.
  • the metallic hollow body is preferably connected by means of a cooling air supply line to a cooling air system. Thus, cooling air leaks are avoided.
  • the ceramic hollow profile is formed as a straight profile and when several such ceramic hollow sections are arranged segment-like on the wall of the combustion chamber to form the curved contour of the combustion chamber is particularly favorable.
  • a metallic support structure 6 with segmented in the circumferential and axial direction ceramic tubular hollow sections 2, which can be produced from a section of a straight profile.
  • a one-sided perforated, air-flow, metallic hollow box 1 which is fastened by means of one or more fasteners 7 together with the ceramic hollow section 2 on the metallic support 6.
  • cooling air supply line 8 in the metallic support 6, the ceramic hollow sections 2 and the metallic hollow box 1 is provided, which is as close as possible to a fastener on this and several as centrally located between them.
  • the hollow box through which the cooling air flows serves to control the cooling air.
  • the air passage openings (perforation) 5 which indicates the flow-determining surface, a suitable amount of cooling air in the corresponding area provided for the ceramic hollow profile 2 can be adjusted. Because the metallic hollow box is completed and has only a cooling air supply line 8 and the air passage openings 5, no leakage currents occur.
  • the cooling air that emerges from the metallic hollow box bounces on the back of the ceramic lining 3 and thus significantly increases the heat transfer.
  • the air escapes thereafter at the ends of the ceramic hollow profile and, due to the axial segmentation, can serve for film cooling of the ceramic surface facing the hot gas, but also for protecting the metallic structure from hot gas penetration into the intermediate gaps.
  • a perforation of the hot gas side ceramic surface 9 is advantageous.
  • the one-sided perforated, air-flow, metallic hollow box allows a controlled cooling air distribution in the combustion chamber wall. There are no parasitic leakage currents. Through the perforation of the hollow box, the back of the ceramic surface facing the combustion chamber can be cooled tightly. As a result, the heat flow from the wall is significantly increased. By an additional perforation of the ceramic surface, the cooling effect can be increased again. If the holes for cooling air supply positioned as close as possible to the fasteners, no leakage currents can occur along the gaps between the individual components.
  • the segmented structure makes it possible to produce universally applicable ceramic components that can be used in combustion chambers of any size and shape.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

Die Erfindung bezieht sich auf eine Brennkammer für eine Gasturbine gemäß den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a combustion chamber for a gas turbine according to the features of the preamble of claim 1.

Im Einzelnen bezieht sich die Erfindung auf eine Brennkammer für eine Gasturbine mit einer metallischen Tragstruktur sowie mit mehreren am Umfang verteilt angeordneten keramischen Hohlprofilen, welche an der Tragstruktur befestigt sind. Dieser Stand der Technik ist aus der DE 195 02 730 A1 vorbekannt.In detail, the invention relates to a combustion chamber for a gas turbine with a metallic support structure and with a plurality of distributed circumferentially arranged ceramic hollow profiles, which are fixed to the support structure. This prior art is from the DE 195 02 730 A1 previously known.

Die DE 195 02 730 A1 beschreibt die keramische Auskleidung einer Brennkammer mit mindestens einer ungekühlten Wandplatte, die aus hochtemperaturbeständiger Strukturkeramik besteht und die mit Hilfe eines Befestigungselements federelastisch an eine Haltevorrichtung angebunden ist. Die Verbindungsfläche zwischen dem Befestigungselement und der Keramik ist so geformt, dass nur minimale thermische Spannungen entstehen.The DE 195 02 730 A1 describes the ceramic lining of a combustion chamber with at least one uncooled wall plate, which consists of high-temperature-resistant structural ceramic and which is connected by means of a fastening element resiliently to a holding device. The bonding surface between the fastener and the ceramic is shaped to provide minimal thermal stress.

Der Nachteil besteht darin, dass nur eine konvektive Kühlung der metallischen Wand möglich ist, die einen hohen Kühlluftmassenstrom erfordert. Hinzu kommt, dass das Befestigungselement auf der zum Heißgas hingewandten Seite aufliegt und somit erhöhten thermischen Belastungen ausgesetzt ist.The disadvantage is that only a convective cooling of the metallic wall is possible, which requires a high cooling air mass flow. In addition, the fastener rests on the side facing the hot gas side and is thus exposed to elevated thermal loads.

Die EP 0 943.867 B1 beschreibt die keramische Auskleidung einer Brennkammer mit einzelnen nebeneinander angeordneten Segmenten in Form von Hohlkammern, die auch zur Strömungsführung dienen können. Die keramische Auskleidung kann auf der zur metallischen Struktur gewandten Seite befestigt werden.The EP 0 943 867 B1 describes the ceramic lining of a combustion chamber with individual juxtaposed segments in the form of hollow chambers, which can also serve for flow guidance. The ceramic lining can be fixed on the side facing the metallic structure.

Zwar kann bei dieser Lösung der Hohlraum auch zur Kühlungsführung vorgesehen werden und erreicht damit höhere Wärmeübertragungsraten; aber diese Kühltechnik beschränkt sich lediglich auf eine konvektive Kühlung des zum Brenninnenraum gerichteten keramischen Wandelements. Desweiteren ist nicht ersichtlich, wie eine Dosierung der Kühlluft erfolgt und auch eine Kontrolle der lokalen Kühlmassenströme in dem durchgehenden Hohlraum wird als schwierig erachtet. Ein weiterer Nachteil ist, dass die gesamte axiale Baulänge aus einem Stück gefertigt wird. Das führt dazu, dass Knicke in einem Stück mitgefertigt werden müssen.Although in this solution, the cavity can also be provided for cooling guidance and thus achieves higher Heat transfer rates; but this cooling technology is limited only to a convective cooling of the ceramic wall element directed towards the internal combustion chamber. Furthermore, it is not apparent how a dosage of the cooling air takes place and also a control of the local cooling mass flows in the continuous cavity is considered difficult. Another disadvantage is that the entire axial length is made in one piece. The result is that kinks must be mitgefertigt in one piece.

Beide vorbekannten Lösungen haben den Nachteil, dass federnd gelagerte elastische Befestigungselemente verwendet werden. Bei den bekannten Oszillationen in einem Triebwerk mit dementsprechend hohen Drücken führt das zu Schwingungen wie bei einem Feder-Masse-Schwingsystem.Both previously known solutions have the disadvantage that resiliently mounted elastic fastening elements are used. In the known oscillations in an engine with correspondingly high pressures, this leads to vibrations as in a spring-mass vibration system.

Die EP 1 431 661 A1 , welche den nächstkommenden Stand der Technik bildet, offenbart mehrere am Umfang einer Brennkammer an einer Tragstruktur angeordnete metallische rohrförmige Hohlprofile, welche geradlinig ausgebildet und als einzelne Segmente ausgestaltet sind. In dem Hohlprofil ist jeweils ein metallischer Hohlkörper, welcher von Kühlluft durchströmt wird, angeordnet. Durch die sich ergebenden Wärmeübergänge der metallischen Materialien ergibt sich unter allen Betriebsbedingungen eine optimale Kühlung.The EP 1 431 661 A1 , which forms the closest prior art, discloses a plurality of metallic tubular hollow profiles arranged on a support structure on the circumference of a combustion chamber, which are rectilinear and designed as individual segments. In the hollow profile is in each case a metallic hollow body, which is flowed through by cooling air arranged. The resulting heat transfer of the metallic materials results in optimum cooling under all operating conditions.

Die EP 1 271 056 A1 zeigt eine Gasturbinen-Brennkammer mit Hohlelementen aus metallischen oder keramischen Materialien.The EP 1 271 056 A1 shows a gas turbine combustor with hollow elements of metallic or ceramic materials.

Der Erfindung liegt die Aufgabe zugrunde, eine Brennkammer der eingangs genannten Art für eine Gasturbine zu schaffen, welche bei einfachem Aufbau und einfacher, funktionssicherer Anwendbarkeit kostengünstig herstellbar ist und die Nachteile des Standes der Technik vermeidet.The invention has for its object to provide a combustion chamber of the type mentioned for a gas turbine, which With a simple structure and simple, reliable application is inexpensive to produce and avoids the disadvantages of the prior art.

Erfindungsgemäß wird die Aufgabe durch die Merkmalskombination des Anspruchs 1 gelöst, die Unteransprüche zeigen weitere vorteilhafte Ausgestaltungen der Erfindung.According to the invention the object is achieved by the combination of features of claim 1, the dependent claims show further advantageous embodiments of the invention.

Erfindungsgemäß ist somit vorgesehen, dass die keramischen, rohrförmigen Hohlprofile jeweils geradlinig ausgebildet sind und als einzelne Segmente angeordnet sind. In den keramischen Hohlprofilen ist jeweils ein metallischer Hohlkörper angeordnet, welcher bevorzugterweise in Form einer Hohlbox ausgebildet ist. An zumindest einer Wandung sind an dem metallischen Hohlkörper Luftdurchtrittsöffnungen vorgesehen, welche in Form einer Perforation ausgebildet sein können. Durch diese Luftdurchtrittsöffnungen entweicht Kühlluft, welche in den metallischen Hohlkörper eingeleitet wird.According to the invention it is thus provided that the ceramic, tubular hollow profiles are each formed in a straight line and are arranged as individual segments. In the ceramic hollow profiles, in each case a metallic hollow body is arranged, which is preferably formed in the form of a hollow box. On at least one wall air passage openings are provided on the metallic hollow body, which may be formed in the form of a perforation. Through this air passage openings escapes cooling air, which is introduced into the metallic hollow body.

Der metallische Hohlkörper ist bevorzugterweise unter Bildung eines Zwischenraums in dem keramischen Hohlprofil angeordnet, so dass die durch die Luftdurchtrittsöffnungen entströmende Kühlluft sich in dem keramischen Hohlprofil verteilen kann.The metallic hollow body is preferably arranged to form a gap in the ceramic hollow profile, so that the cooling air flowing through the air passage openings can be distributed in the ceramic hollow profile.

Das keramische Hohlprofil ist an seiner einer Brennkammer zugewandten Wandung mit zusätzlichen Luftdurchtrittsöffnungen versehen sein.The ceramic hollow profile is provided on its wall facing a combustion chamber with additional air passage openings.

Die Luftdurchtrittsöffnungen (Perforation) des metallischen Hohlkörpers sind bevorzugterweise an der dem Brennkammerinnenraum zugewandten Wandung ausgebildet, um eine effektive Kühlung des keramischen Hohlprofils zu gewährleisten.The air passage openings (perforation) of the metallic hollow body are preferably formed on the combustion chamber interior facing wall to ensure effective cooling of the ceramic hollow profile.

Der metallische Hohlkörper ist bevorzugterweise mittels einer Kühlluftzuleitung an ein Kühlluftsystem angeschlossen. Somit werden Kühlluft-Leckagen vermieden.The metallic hollow body is preferably connected by means of a cooling air supply line to a cooling air system. Thus, cooling air leaks are avoided.

Besonders günstig ist es, wenn das keramische Hohlprofil als geradliniges Profil ausgebildet ist und wenn mehrere derartige keramische Hohlprofile segmentartig an der Wandung der Brennkammer angeordnet sind, um die gekrümmte Kontur der Brennkammer zu bilden.It when the ceramic hollow profile is formed as a straight profile and when several such ceramic hollow sections are arranged segment-like on the wall of the combustion chamber to form the curved contour of the combustion chamber is particularly favorable.

Im Folgenden wird die Erfindung anhand von Ausführungsbeispielen in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:

Fig. 1
eine perspektivische Teil-Ansicht einer erfindungsgemäßen Brennkammerauskleidung,
Fig. 2
eine perspektivische Ansicht als Unteransicht der in Fig. 1 dargestellten Anordnung,
Fig. 3
eine abgewandelte Ausgestaltungsform, analog der Darstellung der Fig. 1, und
Fig. 4
eine perspektivische Unteransicht der Anordnung gemäß Fig. 3.
In the following the invention will be described by means of embodiments in conjunction with the drawing. Showing:
Fig. 1
a partial perspective view of a combustion chamber lining according to the invention,
Fig. 2
a perspective view as a bottom view of in Fig. 1 arrangement shown,
Fig. 3
a modified embodiment, analogous to the representation of Fig. 1 , and
Fig. 4
a perspective bottom view of the arrangement according to Fig. 3 ,

In der folgenden Erfindung werden alle Ausführungsbeispiele in Verbindung mit den Fig. 1-4 beschrieben.In the following invention, all embodiments in conjunction with the Fig. 1-4 described.

Es ist erfindungsgemäß vorgesehen, eine metallische Tragstruktur 6 mit in Umfangs- und Axialrichtung segmentierten keramischen, rohrförmigen Hohlprofilen 2 auszukleiden, die sich aus einem Abschnitt eines geraden Profils herstellen lassen. Im Hohlraum 10 des keramischen Hohlprofils befindet sich eine einseitig perforierte, luftdurchströmte, metallische Hohlbox 1, die mit Hilfe eines oder mehrerer Befestigungselemente 7 zusammen mit dem keramischen Hohlprofil 2 am metallischen Träger 6 befestigt wird.It is inventively provided to line a metallic support structure 6 with segmented in the circumferential and axial direction ceramic tubular hollow sections 2, which can be produced from a section of a straight profile. In the cavity 10 of the ceramic hollow profile is a one-sided perforated, air-flow, metallic hollow box 1, which is fastened by means of one or more fasteners 7 together with the ceramic hollow section 2 on the metallic support 6.

Zur Befestigung wird ein entsprechendes Befestigungselement nach US 4,512,699 (daze fasteners) vorgeschlagen, jedoch eignet sich hierfür jedes sich im Laufe eines Betriebes spannungsfrei verhaltende Befestigungselement.For attachment, a corresponding fastener after US 4,512,699 (daze fasteners) proposed, but this is suitable for any stress-free behaving in the course of operation fastener.

Es wird eine Kühlluftzuleitung 8 in dem metallischen Träger 6, den keramischen Hohlprofilen 2 und der metallischen Hohlbox 1 vorgesehen, die bei einem Befestigungselement möglichst nah an diesem liegt und bei mehreren möglichst mittig zwischen jenen liegt.There is a cooling air supply line 8 in the metallic support 6, the ceramic hollow sections 2 and the metallic hollow box 1 is provided, which is as close as possible to a fastener on this and several as centrally located between them.

Die im Anschluss von der Kühlluft durchströmte Hohlbox dient zur Kühlluftkontrolle. Durch die Luftdurchtrittsöffnungen (Perforation) 5, die die strömungsbestimmende Oberfläche angibt, kann eine geeignete Menge an Kühlluft in dem entsprechend dafür vorgesehenen Bereich des keramischen Hohlprofils 2 eingestellt werden. Da die metallische Hohlbox abgeschlossen ist und lediglich über eine Kühlluftzuleitung 8 und die Luftdurchtrittsöffnungen 5 verfügt, treten keine Leckageströme auf.The hollow box through which the cooling air flows serves to control the cooling air. Through the air passage openings (perforation) 5, which indicates the flow-determining surface, a suitable amount of cooling air in the corresponding area provided for the ceramic hollow profile 2 can be adjusted. Because the metallic hollow box is completed and has only a cooling air supply line 8 and the air passage openings 5, no leakage currents occur.

Die Kühlluft, die aus der metallischen Hohlbox austritt, prallt auf der Rückseite der keramischen Auskleidung 3 auf und erhöht damit deutlich den Wärmeübergang. Die Luft entweicht im Anschluss daran an den Enden des keramischen Hohlprofils und kann aufgrund der axialen Segmentierung zur Filmkühlung der zum Heißgas gerichteten keramischen Oberfläche dienen, aber auch zum Schutz der metallischen Struktur vor Heißgaseinbrüch in die Zwischenspalte. Auch eine Perforation der heißgasseitigen keramischen Oberfläche 9 ist vorteilhaft.The cooling air that emerges from the metallic hollow box, bounces on the back of the ceramic lining 3 and thus significantly increases the heat transfer. The air escapes thereafter at the ends of the ceramic hollow profile and, due to the axial segmentation, can serve for film cooling of the ceramic surface facing the hot gas, but also for protecting the metallic structure from hot gas penetration into the intermediate gaps. A perforation of the hot gas side ceramic surface 9 is advantageous.

Die einseitig perforierte, luftdurchströmte, metallische Hohlbox ermöglicht eine kontrollierte Kühlluftaufteilung in der Brennkammerwand. Es treten keine parasitären Leckageströme auf. Durch die Perforation der Hohlbox kann die Rückseite der zum Brennraum gerichteten keramischen Oberfläche prall gekühlt werden. Hierdurch wird der, Wärmestrom aus der Wand deutlich erhöht. Durch eine zusätzliche Perforation der keramischen Oberfläche kann die Kühlwirkung noch mal gesteigert werden. Werden die Bohrungen zur Kühlluftzufuhr möglichst nah an den Befestigungselementen positioniert, können keine Leckageströme entlang der Spalte zwischen den einzelnen Bauteilen auftreten. Der segmentierte Aufbau ermöglicht es, universell einsetzbare keramische Bauteile zu produzieren, die in Brennkammern beliebiger Größe und Form Verwendung finden können.The one-sided perforated, air-flow, metallic hollow box allows a controlled cooling air distribution in the combustion chamber wall. There are no parasitic leakage currents. Through the perforation of the hollow box, the back of the ceramic surface facing the combustion chamber can be cooled tightly. As a result, the heat flow from the wall is significantly increased. By an additional perforation of the ceramic surface, the cooling effect can be increased again. If the holes for cooling air supply positioned as close as possible to the fasteners, no leakage currents can occur along the gaps between the individual components. The segmented structure makes it possible to produce universally applicable ceramic components that can be used in combustion chambers of any size and shape.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Metallische Hohlbox/HohlkörperMetallic hollow box / hollow body
22
Keramisches, rohrförmiges Hohlprofil/SegmentCeramic, tubular hollow section / segment
33
Heißgasseitige keramische WandungHot gas side ceramic wall
44
Trägerseitige, keramische WandungSupport side, ceramic wall
55
Perforation/LuftdurchtrittsöffnungPerforation / air passage opening
66
Metallische Tragstruktur/TrägerMetallic support structure / carrier
77
Befestigungselementfastener
88th
KühlluftzuleitungCooling air supply line
99
Keramische Oberfläche/WandungCeramic surface / wall
1010
Hohlraumcavity
1111
LuftdurchtrittsöffnungAir passage opening
1212
BrennkammerinnenraumCombustion chamber interior
1313
Zwischenraumgap

Claims (8)

  1. Combustion chamber for a gas turbine with a metallic supporting structure (6) and several, circumferentially distributed tubular hollow profiles (2) attached to the supporting structure (6), where each hollow profile (2) is designed straight and arranged as an individual segment, and where at least one metallic hollow body (1) is provided in each hollow profile (2), which on at least one wall has air-passage openings (5) through which cooling air can be guided, characterized in that the tubular hollow profiles (2) are made from a ceramic material, and that a wall (9) of the ceramic hollow profile (2) facing a combustion chamber interior (12) is provided with air-passage openings (11).
  2. Combustion chamber in accordance with Claim 1, characterized in that the metallic hollow body (1) is arranged such in the ceramic hollow profile (2) that an intermediate space (13) is formed.
  3. Combustion chamber in accordance with one of the Claims 1 or 2, characterized in that a wall of the metallic hollow body (1) is provided with air-passage openings (5), said wall facing a combustion chamber interior (12).
  4. Combustion chamber in accordance with one of the Claims 1 to 3, characterized in that the air-passage openings (5) are designed in the form of a perforation.
  5. Combustion chamber in accordance with one of the Claims 1 to 3, characterized in that the ceramic tubular hollow profiles (2) and the metallic hollow bodies (1) are mounted on the supporting structure (6) by means of fastening elements (7).
  6. Combustion chamber in accordance with one of the Claims 1 to 5, characterized in that the metallic hollow body (1) is connected to at least one cooling-air supply line (8).
  7. Combustion chamber in accordance with one of the Claims 1 to 6, characterized in that the ceramic tubular hollow profile (2) is designed in the form of a straight profile.
  8. Combustion chamber in accordance with Claim 6, characterized in that the metallic hollow body (1) is designed as a closed structure, with cooling air being introduced only via the cooling-air supply line (8) and discharged only via the air-passage openings (5).
EP08021918.1A 2007-12-27 2008-12-17 Reaction chamber cladding Expired - Fee Related EP2075506B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007062699A DE102007062699A1 (en) 2007-12-27 2007-12-27 combustion liner

Publications (3)

Publication Number Publication Date
EP2075506A2 EP2075506A2 (en) 2009-07-01
EP2075506A3 EP2075506A3 (en) 2014-11-12
EP2075506B1 true EP2075506B1 (en) 2016-04-27

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CN105765131B (en) * 2013-10-17 2018-02-23 哈尼斯菲格技术公司 Liner system for scraper bowl

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EP2075506A2 (en) 2009-07-01
US20090193810A1 (en) 2009-08-06
EP2075506A3 (en) 2014-11-12
DE102007062699A1 (en) 2009-07-02
US8074453B2 (en) 2011-12-13

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