DE102012010935A1 - Heat exchanger for aircraft gas turbine, has substantially tubular twisting element that is arranged at fuel inlet, and is formed for applying twist on flowing fuel by twisting of twisting element - Google Patents
Heat exchanger for aircraft gas turbine, has substantially tubular twisting element that is arranged at fuel inlet, and is formed for applying twist on flowing fuel by twisting of twisting element Download PDFInfo
- Publication number
- DE102012010935A1 DE102012010935A1 DE201210010935 DE102012010935A DE102012010935A1 DE 102012010935 A1 DE102012010935 A1 DE 102012010935A1 DE 201210010935 DE201210010935 DE 201210010935 DE 102012010935 A DE102012010935 A DE 102012010935A DE 102012010935 A1 DE102012010935 A1 DE 102012010935A1
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- heat exchanger
- twisting
- swirl element
- fuel inlet
- 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.)
- Withdrawn
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/224—Heating fuel before feeding to the burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/006—Preventing deposits of ice
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0021—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for aircrafts or cosmonautics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Wärmetauscher einer Fluggasturbine, welcher dazu dient, den kühleren zugeführten Kraftstoff im Wärmeaustausch mit wärmerem Öl zu erwärmen. Das Öl wird beispielsweise aus den Lagern oder Getrieben der Fluggasturbine zugeführt. Derartige Wärmetauscher sind aus dem Stand der Technik bekannt, sie werden als Fuel Cooled Oil Cooler (FCOC) oder Fuel Oil Heat Exchanger (FOHE) bezeichnet.The invention relates to a heat exchanger of an aircraft gas turbine, which serves to heat the cooler fuel supplied in the heat exchange with warmer oil. The oil is supplied, for example, from the bearings or gears of the aircraft gas turbine. Such heat exchangers are known from the prior art, they are referred to as Fuel Cooled Oil Cooler (FCOC) or Fuel Oil Heat Exchanger (FOHE).
Derartige Wärmetauscher umfassen eine Matrix mit röhrenartigen Strömungskanälen und Prallplatten.Such heat exchangers include a matrix with tubular flow channels and baffles.
Unter ungünstigen Betriebsbedingungen eines Flugzeuges kann es vorkommen, dass das im Kraftstoff enthaltene Wasser so abgekühlt wird, dass sich Schneepartikel oder Eispartikel bilden. Dies kann im ungünstigsten Fall dazu führen, dass der gesamte Wärmetauscher durch die Schneepartikel oder Eispartikel verstopft, so dass die Kraftstoffzufuhr unterbrochen wird. Dies kann insbesondere im Landeanflug eines Flugzeuges zu gefährlichen Situationen führen, da dann keine ausreichende Leistung der Fluggasturbine mehr zur Verfügung steht.Under unfavorable operating conditions of an aircraft, it can happen that the water contained in the fuel is cooled down to form snow particles or ice particles. In the worst case, this can cause the entire heat exchanger to become blocked by the snow particles or ice particles, thus interrupting the fuel supply. This can lead to dangerous situations, especially in the landing approach of an aircraft, since then sufficient power of the aircraft gas turbine is no longer available.
Das oben beschriebene Problem tritt insbesondere dann auf, wenn der Kraftstoffeinlass des Wärmetauschers vollständig durch die Schneepartikel oder Eispartikel blockiert wird. Diese Situation kann sich deshalb einstellen weil Wasser statistisch im Kraftstoff vorkommt und sich während des Flugs als Eis an Wänden ablagert. Dieses Eis kann je nach Betriebsbedingungen schlagartig dem Wärmetauscher zugeführt werden.The problem described above particularly occurs when the fuel inlet of the heat exchanger is completely blocked by the snow particles or ice particles. This situation can occur because water statistically occurs in the fuel and deposits itself as ice on walls during the flight. This ice can be fed suddenly to the heat exchanger depending on the operating conditions.
Der Erfindung liegt die Aufgabe zugrunde, einen Wärmetauscher einer Fluggasturbine zu schaffen, welcher bei einfachem Aufbau und einfacher, kostengünstiger. Anwendbarkeit eine Blockierung des Kraftstoffflusses durch Schneepartikel oder Eispartikel ausschließt. Darüber hinaus soll die Erfindung auch noch einfach, ohne großen Umbau aufwand, im Feld nachgerüstet werden können.The invention has for its object to provide a heat exchanger of an aircraft gas turbine, which in a simple structure and easier, cheaper. Applicability excludes blocking of fuel flow by snow particles or ice particles. In addition, the invention should also be easy to retrofit without major conversion can be retrofitted in the field.
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
Erfindungsgemäß ist somit vorgesehen, am Kraftstoffeinlass des Wärmetauschers ein als separates, zusätzliches Bauteil gefertigtes Drallelement anzuordnen. Das Drallelement ist so ausgebildet, dass es einen Drall auf den durch das Drallelement strömenden Kraftstoff aufbringt.According to the invention, it is thus provided to arrange a swirl element manufactured as a separate, additional component at the fuel inlet of the heat exchanger. The swirl element is designed such that it applies a twist to the fuel flowing through the swirl element.
Durch den Drall in der das rohrförmige Drallelement durchströmenden Kraftstoffströmung werden die Schneepartikel oder Eispartikel stromauf des Wärmetauschers in dessen Einströmbereich von dem Kraftstoff separiert. Die Schneepartikel oder Eispartikel sammeln sich dabei an dem Umfangsbereich des rohrförmigen Drallelements und/oder des Wärmetauschers, während der mittlere Bereich des Drallelements und/oder des Wärmetauschers weiterhin für eine Durchströmung des Kraftstoffs freigehalten wird. Das Drallelement, welches einen rohrartigen Strömungskanal aufweist, ist erfindungsgemäß direkt an dem Kraftstoffeinlass des Wärmetauschers angeflanscht oder anderweitig verbunden. Hierdurch ergibt sich der entscheidende Vorteil, dass der Wärmetauscher selbst konstruktiv nicht verändert werden muss. Es können somit die üblichen Wärmetauscher unverändert weiter betrieben werden. Dies vereinfacht die Verwendung des erfindungsgemäßen Drallelements, da der zertifizierte und für die Fluggasturbine zugelassene Wärmetauscher unverändert weiterverwendet werden kann. Es ist lediglich erforderlich, im Rahmen einer kleinen Modifikation, zusätzlich das Drallelement am Kraftstoffeinlass anzuflanschen oder anderweitig zu verbinden.The swirl in the fuel flow flowing through the tubular swirl element separates the snow particles or ice particles upstream of the heat exchanger into its inflow region from the fuel. The snow particles or ice particles accumulate here at the peripheral region of the tubular swirl element and / or the heat exchanger, while the middle region of the swirl element and / or the heat exchanger is kept free for a flow of the fuel. The swirl element, which has a tubular flow channel, according to the invention flanged directly to the fuel inlet of the heat exchanger or otherwise connected. This results in the decisive advantage that the heat exchanger itself does not have to be changed structurally. It can thus continue to operate the usual heat exchanger unchanged. This simplifies the use of the twist element according to the invention, since the certified and approved for the aircraft gas turbine heat exchanger can be used unchanged. It is only necessary, as part of a small modification, to additionally flanging or otherwise connecting the swirl element to the fuel inlet.
Ein weiterer, wesentlicher Vorteil besteht darin, dass das Drallelement einfach und kostengünstig hergestellt werden kann. Es kann somit als zusätzliches Ausrüstungselement in einfacher Weise verwendet werden.Another major advantage is that the swirl element can be easily and inexpensively manufactured. It can thus be used as an additional piece of equipment in a simple manner.
Wie erwähnt, führt die Aufbringung des Dralls in dem rohrartigen Strömungskanal des Drallelements dazu, dass sich die Schneepartikel oder Eispartikel an der Außenwandung des rohrartigen Strömungskanals und/oder des Wärmetauschers anlagern. Dort werden sie durch die Wärme des Wärmetauschers aufgeschmolzen. Somit wird eine vollständige Blockade der Wärmetauschermatrix verhindert, so dass auch in den beschriebenen ungünstigen Betriebszuständen Kraftstoff in die Brennkammer der Gasturbine gefördert werden kann, um eine ausreichende Leistungsreserve der Fluggasturbine zur Verfügung zu haben. Die erforderliche Wärme zum Schmelzen der Schneepartikel oder Eispartikel wird durch das dem Wärmetauscher zugeführte Öl bereitgestellt.As mentioned, the application of the swirl in the tubular flow channel of the swirl element causes the snow particles or ice particles to adhere to the outer wall of the tubular flow channel and / or the heat exchanger. There they are melted by the heat of the heat exchanger. Thus, a complete blockage of the heat exchanger matrix is prevented, so that even in the described unfavorable operating conditions fuel can be conveyed into the combustion chamber of the gas turbine in order to have a sufficient power reserve of the aircraft gas turbine available. The heat required to melt the snow particles or ice particles is provided by the oil supplied to the heat exchanger.
Das erfindungsgemäße Drallelement weist an der Innenwandung des rohrartigen Strömungskanals zumindest eine Drallstruktur auf. Diese kann in Form einer Rippe oder Finne ausgebildet sein. Es ist auch möglich, mehrere derartige Rippen oder Finnen vorzusehen. Die Innenwandung des Drallelements ist somit durch die Drallstruktur so konturiert, dass sich eine langgestreckte Spirale o. Ä. ergibt, durch welche eine Bewegungskomponente in tangentialer Richtung auf den Kraftstoff aufgebracht wird. Durch die dabei wirksame Zentrifugalkraft werden die Schneepartikel oder Eispartikel separiert. Hierdurch bildet sich ein freier Strömungsquerschnitt des rohrförmigen Drallelements und/oder der Wärmetauschermatrix, welcher nicht durch die Schneepartikel oder Eispartikel (Schneematsch) im Kraftstoff verstopft werden kann.The swirl element according to the invention has at least one swirl structure on the inner wall of the tubular flow channel. This may be in the form of a rib or fin. It is also possible to provide a plurality of such ribs or fins. The inner wall of the swirl element is thus contoured by the swirl structure so that an elongated spiral o. Ä. results, by which a component of motion in the tangential direction is applied to the fuel. By doing so effective centrifugal force are the Snow particles or ice particles separated. This creates a free flow cross section of the tubular swirl element and / or the heat exchanger matrix, which can not be blocked by the snow particles or ice particles (slush) in the fuel.
Es versteht sich, dass das erfindungsgemäße Drallelement so dimensioniert ist, dass es auch bei einer Separierung von Schneepartikeln oder Eispartikeln noch einen ausreichenden Strömungsquerschnitt aufweist. Bevorzugt wird somit das Drallelement an seinem rohrartigen Strömungskanal einen größeren Querschnitt aufweisen als der nachfolgende Kanalquerschnitt des Kraftstoffeinlasses des Wärmetauschers.It is understood that the swirl element according to the invention is dimensioned so that it still has a sufficient flow cross-section even with a separation of snow particles or ice particles. Thus, the swirl element will preferably have a larger cross section at its tubular flow channel than the subsequent channel cross section of the fuel inlet of the heat exchanger.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:In the following the invention will be described by means of an embodiment in conjunction with the drawing. Showing:
Die
Stromab des Kraftstoffauslasses
Die
Die
Die
Erfindungsgemäß ergibt sich somit in einfacher Weise eine erhebliche Steigerung der Betriebssicherheit, da ein Leistungsverlust der Fluggasturbine durch eine Blockade der Kraftstoffzuführung im Bereich des Kraftstoff-Öl Wärmetauschers vermieden wird.According to the invention thus results in a simple manner, a significant increase in reliability, since a loss of power of the aircraft gas turbine is avoided by blocking the fuel supply in the field of fuel-oil heat exchanger.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Kraftstoff-Öl-Wärmetauscher (FOHE) bzw. (FCOC)Fuel-oil heat exchanger (FOHE) or (FCOC)
- 22
- Öleinlassoil inlet
- 33
- Ölauslassoil outlet
- 44
- KraftstoffeinlassFuel inlet
- 4'4 '
- KraftstoffeinlassströmungFuel inlet flow
- 55
- Kraftstoffauslassfuel outlet
- 66
- Drallelementswirl element
- 77
- Kraftstoff vom TankFuel from the tank
- 88th
- Draintankdrain tank
- 99
- KraftstoffpumpeFuel pump
- 1010
- KraftstofffilterFuel filter
- 1111
- Bypassventilbypass valve
- 1212
- KraftstoffpumpeFuel pump
- 1313
- Rücklaufreturns
- 1414
- Kraftstoff-ZumessvorrichtungFuel metering
- 1515
- Kraftstoff-MesserFuel meter
- 1616
- KraftstofffilterFuel filter
- 1717
- Einspritzdüseinjection
- 1818
- Steuereinheitcontrol unit
- 1919
- ÜberdruckventilPressure relief valve
- 2020
- ÜberdruckventilPressure relief valve
- 2121
- Strömungskanalflow channel
- 2222
- Innenwandunginner wall
- 2323
- Drallstrukturswirl structure
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210010935 DE102012010935A1 (en) | 2012-06-01 | 2012-06-01 | Heat exchanger for aircraft gas turbine, has substantially tubular twisting element that is arranged at fuel inlet, and is formed for applying twist on flowing fuel by twisting of twisting element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210010935 DE102012010935A1 (en) | 2012-06-01 | 2012-06-01 | Heat exchanger for aircraft gas turbine, has substantially tubular twisting element that is arranged at fuel inlet, and is formed for applying twist on flowing fuel by twisting of twisting element |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012010935A1 true DE102012010935A1 (en) | 2013-12-05 |
Family
ID=49579116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210010935 Withdrawn DE102012010935A1 (en) | 2012-06-01 | 2012-06-01 | Heat exchanger for aircraft gas turbine, has substantially tubular twisting element that is arranged at fuel inlet, and is formed for applying twist on flowing fuel by twisting of twisting element |
Country Status (1)
Country | Link |
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DE (1) | DE102012010935A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104196589A (en) * | 2014-08-29 | 2014-12-10 | 哈尔滨东安发动机(集团)有限公司 | Fuel and slide oil radiator structure |
EP2995788A1 (en) * | 2014-09-12 | 2016-03-16 | Rolls-Royce Corporation | Cyclonic air-oil separating fuel cooled oil cooler |
DE102015112325A1 (en) * | 2015-07-28 | 2017-02-02 | Rolls-Royce Deutschland Ltd & Co Kg | An aircraft engine with a fuel supply device and with at least one hydraulic fluid reservoir comprising a hydraulic fluid circuit with a heat exchanger |
EP3249334A1 (en) * | 2016-05-23 | 2017-11-29 | Hamilton Sundstrand Corporation | Multiple flow heat exchanger |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658249A (en) * | 1970-10-21 | 1972-04-25 | Gen Motors Corp | Apparatus and method for burning contaminated fuel |
GB1482744A (en) * | 1974-08-30 | 1977-08-10 | Denco Miller Ltd | Nozzle for heat exchange tube |
US6502630B1 (en) * | 2001-12-03 | 2003-01-07 | Pratt & Whitney Canada Corp. | Combined hydraulic fluid cooler/tank |
EP0822345B1 (en) * | 1996-07-31 | 2003-09-24 | United Technologies Corporation | Fuel drain metering device for gas turbine augmentors |
US20110185731A1 (en) * | 2010-01-29 | 2011-08-04 | Rolls-Royce Plc | Oil cooler |
-
2012
- 2012-06-01 DE DE201210010935 patent/DE102012010935A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658249A (en) * | 1970-10-21 | 1972-04-25 | Gen Motors Corp | Apparatus and method for burning contaminated fuel |
GB1482744A (en) * | 1974-08-30 | 1977-08-10 | Denco Miller Ltd | Nozzle for heat exchange tube |
EP0822345B1 (en) * | 1996-07-31 | 2003-09-24 | United Technologies Corporation | Fuel drain metering device for gas turbine augmentors |
US6502630B1 (en) * | 2001-12-03 | 2003-01-07 | Pratt & Whitney Canada Corp. | Combined hydraulic fluid cooler/tank |
US20110185731A1 (en) * | 2010-01-29 | 2011-08-04 | Rolls-Royce Plc | Oil cooler |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104196589A (en) * | 2014-08-29 | 2014-12-10 | 哈尔滨东安发动机(集团)有限公司 | Fuel and slide oil radiator structure |
EP2995788A1 (en) * | 2014-09-12 | 2016-03-16 | Rolls-Royce Corporation | Cyclonic air-oil separating fuel cooled oil cooler |
US10323606B2 (en) | 2014-09-12 | 2019-06-18 | Rolls-Royce North American Technologies, Inc. | Cyclonic air-oil separating fuel cooled oil cooler |
DE102015112325A1 (en) * | 2015-07-28 | 2017-02-02 | Rolls-Royce Deutschland Ltd & Co Kg | An aircraft engine with a fuel supply device and with at least one hydraulic fluid reservoir comprising a hydraulic fluid circuit with a heat exchanger |
EP3249334A1 (en) * | 2016-05-23 | 2017-11-29 | Hamilton Sundstrand Corporation | Multiple flow heat exchanger |
US10612860B2 (en) | 2016-05-23 | 2020-04-07 | Hamilton Sunstrand Corporation | Multiple flow heat exchanger |
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Legal Events
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R163 | Identified publications notified | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20150101 |