EP0813670B1 - Axial gestufte doppelring-brennkammer einer gasturbine - Google Patents
Axial gestufte doppelring-brennkammer einer gasturbine Download PDFInfo
- Publication number
- EP0813670B1 EP0813670B1 EP96904099A EP96904099A EP0813670B1 EP 0813670 B1 EP0813670 B1 EP 0813670B1 EP 96904099 A EP96904099 A EP 96904099A EP 96904099 A EP96904099 A EP 96904099A EP 0813670 B1 EP0813670 B1 EP 0813670B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- pilot burner
- section
- zone
- burner zone
- 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.)
- Expired - Lifetime
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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
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/34—Feeding into different combustion zones
Definitions
- the invention relates to an axially stepped annular combustion chamber of a gas turbine with a central axis, with a plurality of pilot burners located between annular wall sections and with main burners opening downstream and radially outside of this into the combustion chamber, to which a main burner zone adjoins, with an outer and an inner ring Combustion chamber wall, which each extend towards the combustion chamber outlet, the inner combustion chamber wall in the region of the pilot burner zone having a wall section running essentially parallel to the pilot burner axis.
- the inner combustion chamber wall following the inner wall section forming the pilot burner zone and also essentially parallel to the central axis, runs towards the main burner zone with respect to the combustion chamber (ie viewed from within the combustion chamber) when viewed downstream has convex-concave deflection section, which, viewed in the radial direction with respect to the central axis, merges between the pilot burner axis and the downstream edge of the outer pilot burner wall section into a wall section which runs in a straight line and slightly diverging with respect to the central axis to the combustion chamber outlet.
- Advantageous training and further education are included in the subclaims.
- Fig. 1 is a partial longitudinal section of an annular combustion chamber is shown.
- Fig. 2 shows two possible partial cross sections of an inventive Ring combustion chamber.
- the central axis is a fundamentally known one Annular combustion chamber 2 in particular referred to an aircraft gas turbine.
- the Annular combustion chamber 2 are several pilot burners distributed over their circumference 3 and several main burners 4 are arranged.
- the main burner 4 are like usual in the radial direction outside and can in a preferred embodiment with their longitudinal axes or main burner axes 4a inclined with respect to the longitudinal axes 3a of the pilot burner 3, d. H. inclined towards the so-called pilot burner axes 3a.
- the radial direction Main burners 4 arranged outside the pilot burner 3 thus open out downstream of the pilot burner 3 into the combustion chamber 2 Pilot burner 3 a so-called pilot burner zone 5, while directly downstream of the Main burner 4, a so-called main burner zone 5 'is formed.
- the entire combustion chamber 2 i.e. the unit of pilot burner zone 5 and main burner zone 5 'from an outer annular combustion chamber wall 10 and towards the central axis 1 from an inner combustion chamber wall 11.
- the latter consists of individual so-called wall sections, and from an inner wall section assigned to the pilot burner zone 5 6a, from an adjoining so-called deflection section 12, and from a wall section 13 leading to the combustion chamber outlet 8.
- the pilot burner zone 5 is limited in the radial direction towards the outside from an outer wall section 6b which extends to the main burner 4.
- the outer wall section 6b closes or closes the main burner (s) 4, whereby - as can be seen - each main burner 4 or each main burner axis 4a inclined to the pilot burner axis 3a each Pilot burner 3 is arranged. Downstream far outside of the combustion chamber would the two longitudinal axes 3a, 4a of the burners 3, 4 intersect while the longitudinal axis 3a is substantially parallel to the central axis 1 is aligned.
- the individual Longitudinal axes 3a, 4a of the pilot burner 3 or the main burner 4 are different (for example, parallel) to be arranged.
- the pilot burners also need to 3 and main burner 4 not - as shown here - each in one common longitudinal section plane, but it can be the pilot burner 3 and the main burner 4 also offset from one another in the circumferential direction be arranged, as shown in simplified form in FIG. Basically, the direction of flow is still generally in the combustion chamber 2 the combustion gases represented by arrow 7.
- the course of the inner combustion chamber wall 11 is essential here points - as shown - to the one forming the pilot burner zone 5 Wall section 6a one running towards the main burner zone 5 ' Deflection section 12.
- This deflection section 12 is at least partially in the radial direction (by definition this is perpendicular to the central axis 1) aligned, i.e. a straight extension of the deflection section 12 would center axis 1 in the embodiment shown here cut at an angle of approx. 45 °.
- This partially radial alignment of the Deflection section 12 causes the combustion gases of the pilot burner 3 guided through this deflection section 12 essentially in a radial direction Enter the direction into the main burner zone 5 '.
- This course of the inner combustion chamber wall 11 can also be described in such a way that this combustion chamber wall 11 in the region of the deflection section 12 and in relation to the combustion chamber 2, that is to say from the interior viewed from the combustion chamber when viewed downstream (namely in flow direction 7) is convex-concave.
- the transition in terms of straight line the central axis 1 is slightly divergent to the combustion chamber outlet 8 Viewed in the radial direction, the wall section lies between the pilot burner axis 3a and the downstream edge of the outer Pilot burner wall section 6b.
- This described design represents an optimal mix of the above Main burner 4 with fuel entering the main burner zone 5 ' the air in the main burner zone 5 '. This will reduce the exhaust emissions minimized and there can be the temperature distribution at the combustion chamber outlet 8 aligned to that of a non-stepped combustion chamber become.
- the outer wall section 6b of the pilot burner zone 5 facing the main burner 4 is inclined relative to the longitudinal axis 3a of the associated pilot burner 3 in such a way that the cross section D of the pilot burner zone 5 is in the flow direction, ie from the pilot burner 3 in the direction of the arrow 7 to the center the combustion chamber 2 down.
- the axially stepped according to the invention described here can be Ring combustion chamber 2 basically as an assembly of two independent Designate a non-stepped ring burner.
- the main burner zone is on the outside 5 'constructed like a conventional non-staged ring combustion chamber, the main burner axis 4a essentially in the direction of the combustion chamber axis shows or coincides with this.
- Mixed air jets 9 are in the main burner zone 5 'or in the ring combustion chamber 2 on both sides, i.e. admixed from the inside and outside, as is the case with conventional ones Annular combustion chambers is common. It is now also planned for this (conventional) ring combustion chamber 2 a coupled pilot burner zone 5, i.e. quasi a separate pilot combustion chamber, the radial inside and upstream to the main burner zone 5 '.
- the described design of the annular combustion chamber advantageously results 2 additionally an extremely compact design, i.e. the Diameter of a ring combustion chamber designed in this way or its so-called. Overall height can be minimized. This results in the cheapest Ratios when the dimension of the penetration depth A is related to the cross section D * of the pilot burner zone 5 in the area of the pilot burner 3 in the value range from 0.1 to 0.3, i.e. 0.1 ⁇ ⁇ / D * ⁇ 0.3.
- the outer wall section 6b of the pilot burner zone 5 also runs as the entire ring combustion chamber 2 is essentially ring-shaped, however this does not mean that the reduction in cross section mentioned above Pilot burner zone 5 essentially over the entire ring combustion chamber 2 must be provided in the same size all around, although this is quite possible. Rather, only in the area of the main burner 4 quasi bowl-shaped depressions otherwise essentially parallel to the pilot burner longitudinal axis 3 extending outer wall section 6b be provided.
- the latter design is in the lower half of Fig.2 shown schematically, while the first design in the upper half of Fig.2, which is basically a view against the flow direction 7 shows.
- pilot burner zone 5 formed by cup-shaped depressions
- Cross-sectional reduction of the pilot burner zone 5 essentially in the through the longitudinal axes 4a of the main burner 4 and the central axis 1 of the Ring combustion chamber 2 levels provided.
- the Wall section 13 essentially part of the main burner zone 5 ' or the corresponding main combustion chamber.
- the pilot burner zone 5 viewed in the direction of flow 7 in the region of the deflection section 12 their end.
- Mixed air jets 14 both inside and - shortly upstream of the main burner 4 - are supplied on the outside.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Description
Zum bekannten Stand der Technik wird beispielshalber auf die WO 93/25851 oder die DE-OS 28 38 258 , insbesondere jedoch auch auf die GB-A-2 010 408 verwiesen, worin eine axial gestufte Ring-Brennkammer gezeigt ist, bei der die Verbrennungsgase der Pilotbrenner-Zone durch eine entsprechende Gestaltung insbesondere der inneren Brennkammerwand in die Hauptbrennerzone eingeleitet werden.
Vorteilhafte Aus- und Weiterbildungen sind Inhalt der Unteransprüche.
Wie ersichtlich ist der äußere, dem Hauptbrenner 4 zugewandte Wandabschnitt 6b der Pilotbrenner-Zone 5 gegenüber der Längsachse 3a des zugeordneten Pilotbrenners 3 derart geneigt, daß sich der Querschnitt D der Pilotbrenner-Zone 5 in Strömungsrichtung, d.h. vom Pilotbrenner 3 gemäß Pfeilrichtung 7 zum Zentrum der Brennkammer 2 hin, verringert. Dies bedeutet, daß der Hauptbrenner 4 quasi in die Pilotbrenner-Zone 5 eintaucht bzw. eindringt, wie dies in Form der sog. Eindringtiefe Δ besonders gut ersichtlich wird. Diese Querschnittsverringerung der Pilotbrenner-Zone 5 bzw. dieses Eindringen des Hauptbrenners 4 in die Pilotbrenner-Zone 5 bewirkt zum einen eine besonders gute Vermischung der Hauptbrennergase mit den Gasen des Pilotbrenners 3, da letztere eine vorteilhafte Veränderung ihres Strömungsfeldes erfahren. Die Pilotbrennergase werden nämlich durch den äußeren Wandabschnitt 6b verstärkt verwirbelt und aufgrund der Querschnittsverringerung zusätzlich beschleunigt. Eine bessere Mischung im Zentrum der Brennkammer 2 mit den von den Hauptbrenner 4 emittierten Gasströmungen ist somit die Folge.
Claims (8)
- Axial gestufte Ring-Brennkammer einer Gasturbine mit einer Zentralachse (1), mit mehreren zwischen ringförmigen Wandabschnitten (6a, 6b) liegenden Pilotbrennern (3) sowie mit stromab und radial außerhalb dieser in die Brennkammer (2) mündenden Hauptbrennern (4), an die sich eine Hauptbrennerzone (5') anschließt, mit einer äußeren (10) und einer inneren (11) jeweils ringförmigen Brennkammerwand, die sich jeweils zum Brennkammer-Austritt (8) hin erstrecken, wobei die innere Brennkammerwand (11) im Bereich der Pilotbrenner-zone (5) einen im wesentlichen parallel zur Pilotbrenner-Achse (3a) verlaufenden Wandabschnitt (6a) aufweist,
dadurch gekennzeichnet, daß die innere Brennkammerwand (11) im Anschluß an den die Pilotbrennerzone (5) bildenden und im wesentlichen auch parallel zur Zentralachse (1) verlaufenden inneren Wandabschnitt (6a) einen zur Hauptbrennerzone (5') hin verlaufenden, in Bezug auf die Brennkammer (2) bei stromabwärtiger Betrachtung konvex-konkav geformten Umlenkabschnitt (12) aufweist,
welcher in radialer Richtung bezüglich der Zentralachse (1) betrachtet zwischen der Pilotbrenner-Achse (3a) und der stromabwärtigen Kante des äußeren Pilotbrenner-Wandabschittes (6b) in einen Wandabschnitt (13) übergeht, der in gerader Linie und bezüglich der Zentralachse (1) leicht divergierend zum Brennkammer-Austritt (8) verläuft. - Ring-Brennkammer nach Anspruch 1,
dadurch gekennzeichnet, daß die Verbrennungsgase der Pilotbrenner (3) geführt durch den Umlenkabschnitt (12) im wesentlichen in radialer Richtung in die Hauptbrennerzone (5') eintreten. - Ring-Brennkammer nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der den Hauptbrennern (4) zugewandte äußere Wandabschnitt (6b) der Pilotbrenner-Zone (5) gegenüber der Längsachse (3a) des zugeordneten Pilotbrenners (3) geneigt verläuft, wodurch sich der Querschnitt (D) der Pilotbrenner-Zone (5) in Strömungsrichtung (7) verringert. - Ring-Brennkammer nach Anspruch 3,
dadurch gekennzeichnet, daß das Maß der sich mit der Querschnittsverringerung der Pilotbrenner-Zone (5) einstellenden Eindringtiefe (Δ) der Hauptbrenner (4) in die Pilotbrenner-Zone (5) bezogen auf den Querschnitt (D*) der Pilotbrenner-Zone (5) im Bereich der Pilotbrenner (3) im Wertebereich von 0,1 bis 0,3 liegt. - Ring-Brennkammer nach Anspruch 3 oder 4,
dadurch gekennzeichnet, daß die Querschnittsverringerung der Pilotbrenner-Zone (5) im wesentlichen in den durch die Längsachsen (4a) der Hauptbrenner (4) sowie die Zentralachse (1) der Ring-Brennkammer (2) gebildeten Ebenen vorgesehen ist. - Ring-Brennkammer nach Anspruch 3 oder 4,
dadurch gekennzeichnet, daß die Querschnittsverringerung der Pilotbrenner-Zone (5) im wesentlichen über der gesamten Ring-Brennkammer (2) umlaufend vorgesehen ist. - Ring-Brennkammer nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Hauptbrenner (4) und Pilotbrenner (3) in Umfangsrichtung versetzt zueinander angeordnet sind. - Ring-Brennkammer nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß das stromabwärtige Ende der Pilotbrennerzone (5) durch über Öffnungen in der Brennkammerwand (11, 6b) zugeführte Mischluftstrahlen (14) definiert ist.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995108109 DE19508109A1 (de) | 1995-03-08 | 1995-03-08 | Axial gestufte Ring-Brennkammer einer Gasturbine |
| DE19508109 | 1995-03-08 | ||
| DE1996100837 DE19600837A1 (de) | 1996-01-12 | 1996-01-12 | Axial gestufte Ring-Brennkammer einer Gasturbine |
| DE19600837 | 1996-01-12 | ||
| PCT/EP1996/000895 WO1996027766A1 (de) | 1995-03-08 | 1996-03-04 | Axial gestufte doppelring-brennkammer einer gasturbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0813670A1 EP0813670A1 (de) | 1997-12-29 |
| EP0813670B1 true EP0813670B1 (de) | 2000-06-28 |
Family
ID=26013126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96904099A Expired - Lifetime EP0813670B1 (de) | 1995-03-08 | 1996-03-04 | Axial gestufte doppelring-brennkammer einer gasturbine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6058710A (de) |
| EP (1) | EP0813670B1 (de) |
| CA (1) | CA2216115A1 (de) |
| DE (1) | DE59605505D1 (de) |
| WO (1) | WO1996027766A1 (de) |
Families Citing this family (27)
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| GB2319078B (en) * | 1996-11-08 | 1999-11-03 | Europ Gas Turbines Ltd | Combustor arrangement |
| DE10020598A1 (de) * | 2000-04-27 | 2002-03-07 | Rolls Royce Deutschland | Gasturbinenbrennkammer mit Zuleitungsöffnungen |
| CN100529547C (zh) * | 2002-01-14 | 2009-08-19 | 阿尔斯通技术有限公司 | 用于燃气轮机的环形燃烧室的燃烧器装置 |
| RU2210034C1 (ru) * | 2002-03-06 | 2003-08-10 | Государственное унитарное предприятие Тушинское машиностроительное конструкторское бюро "Союз" - дочернее предприятие Федерального государственного унитарного предприятия Российской самолётостроительной корпорации "МиГ" | Кольцевая камера сгорания газотурбинного двигателя |
| US6968699B2 (en) * | 2003-05-08 | 2005-11-29 | General Electric Company | Sector staging combustor |
| FR2856468B1 (fr) * | 2003-06-17 | 2007-11-23 | Snecma Moteurs | Chambre de combustion annulaire de turbomachine |
| US7506511B2 (en) * | 2003-12-23 | 2009-03-24 | Honeywell International Inc. | Reduced exhaust emissions gas turbine engine combustor |
| ITMI20032621A1 (it) * | 2003-12-30 | 2005-06-30 | Nuovo Pignone Spa | Sistema di combustione a basse emissioni inquinanti |
| RU2315913C2 (ru) * | 2005-09-26 | 2008-01-27 | Открытое акционерное общество "Авиадвигатель" | Малоэмиссионная камера сгорания газовой турбины |
| US7631500B2 (en) * | 2006-09-29 | 2009-12-15 | General Electric Company | Methods and apparatus to facilitate decreasing combustor acoustics |
| DE102008053755A1 (de) | 2008-10-28 | 2010-04-29 | Pfeifer, Uwe, Dr. | Register Pilotbrennersystem für Gasturbinen |
| US8281597B2 (en) * | 2008-12-31 | 2012-10-09 | General Electric Company | Cooled flameholder swirl cup |
| RU2534189C2 (ru) * | 2010-02-16 | 2014-11-27 | Дженерал Электрик Компани | Камера сгорания для газовой турбины(варианты) и способ эксплуатации газовой турбины |
| EP2434222B1 (de) * | 2010-09-24 | 2019-02-27 | Ansaldo Energia IP UK Limited | Verfahren zum betrieb einer verbrennungskammer |
| US8991187B2 (en) | 2010-10-11 | 2015-03-31 | General Electric Company | Combustor with a lean pre-nozzle fuel injection system |
| US9243802B2 (en) | 2011-12-07 | 2016-01-26 | Pratt & Whitney Canada Corp. | Two-stage combustor for gas turbine engine |
| US9194586B2 (en) | 2011-12-07 | 2015-11-24 | Pratt & Whitney Canada Corp. | Two-stage combustor for gas turbine engine |
| US9416972B2 (en) * | 2011-12-07 | 2016-08-16 | Pratt & Whitney Canada Corp. | Two-stage combustor for gas turbine engine |
| EP2677239A1 (de) * | 2012-06-19 | 2013-12-25 | Alstom Technology Ltd | Verfahren zum Betrieb einer zwei-stufigen Gasturbinen-Brennkammer |
| CA2829613C (en) * | 2012-10-22 | 2016-02-23 | Alstom Technology Ltd. | Method for operating a gas turbine with sequential combustion and gas turbine for conducting said method |
| WO2015009449A1 (en) * | 2013-07-17 | 2015-01-22 | United Technologies Corporation | Supply duct for cooling air |
| US10641176B2 (en) * | 2016-03-25 | 2020-05-05 | General Electric Company | Combustion system with panel fuel injector |
| US10739003B2 (en) | 2016-10-03 | 2020-08-11 | United Technologies Corporation | Radial fuel shifting and biasing in an axial staged combustor for a gas turbine engine |
| US10508811B2 (en) | 2016-10-03 | 2019-12-17 | United Technologies Corporation | Circumferential fuel shifting and biasing in an axial staged combustor for a gas turbine engine |
| US11073286B2 (en) | 2017-09-20 | 2021-07-27 | General Electric Company | Trapped vortex combustor and method for operating the same |
| US10816213B2 (en) | 2018-03-01 | 2020-10-27 | General Electric Company | Combustor assembly with structural cowl and decoupled chamber |
| US12031486B2 (en) * | 2022-01-13 | 2024-07-09 | General Electric Company | Combustor with lean openings |
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-
1996
- 1996-03-04 EP EP96904099A patent/EP0813670B1/de not_active Expired - Lifetime
- 1996-03-04 WO PCT/EP1996/000895 patent/WO1996027766A1/de not_active Ceased
- 1996-03-04 DE DE59605505T patent/DE59605505D1/de not_active Expired - Fee Related
- 1996-03-04 CA CA002216115A patent/CA2216115A1/en not_active Abandoned
- 1996-03-04 US US08/913,123 patent/US6058710A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1996027766A1 (de) | 1996-09-12 |
| DE59605505D1 (de) | 2000-08-03 |
| US6058710A (en) | 2000-05-09 |
| CA2216115A1 (en) | 1996-09-12 |
| EP0813670A1 (de) | 1997-12-29 |
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