EP2107304A1 - Drallzerstäubungsdüse zur Zerstäubung von Flüssigbrennstoff und Herstellungsverfahren derselben, Düsenstock für einen Brenner mit der Drallzerstäubungsdüse - Google Patents

Drallzerstäubungsdüse zur Zerstäubung von Flüssigbrennstoff und Herstellungsverfahren derselben, Düsenstock für einen Brenner mit der Drallzerstäubungsdüse Download PDF

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Publication number
EP2107304A1
EP2107304A1 EP08006681A EP08006681A EP2107304A1 EP 2107304 A1 EP2107304 A1 EP 2107304A1 EP 08006681 A EP08006681 A EP 08006681A EP 08006681 A EP08006681 A EP 08006681A EP 2107304 A1 EP2107304 A1 EP 2107304A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
hollow cylinder
swirl
chamber
blank
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Withdrawn
Application number
EP08006681A
Other languages
German (de)
English (en)
French (fr)
Inventor
Andreas Dr. Heilos
Oliver Dr. Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP08006681A priority Critical patent/EP2107304A1/de
Priority to US12/935,027 priority patent/US20110024517A1/en
Priority to PCT/EP2009/053361 priority patent/WO2009121743A1/de
Priority to JP2011502336A priority patent/JP5230795B2/ja
Priority to EP09726964A priority patent/EP2257741A1/de
Priority to RU2010144475/02A priority patent/RU2492959C2/ru
Publication of EP2107304A1 publication Critical patent/EP2107304A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
    • F23D11/103—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber with means creating a swirl inside the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • B21K21/14—Shaping end portions of hollow articles closed or substantially-closed ends, e.g. cartridge bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F23D11/383—Nozzles; Cleaning devices therefor with swirl means

Definitions

  • the invention relates to a swirl atomizing nozzle for the atomization of liquid fuel, a method for producing the swirl atomizing nozzle and a nozzle assembly for a combustion chamber, in particular for a gas turbine, with the swirl atomizing nozzle.
  • a gas turbine has a compressor, a combustion chamber and a turbine.
  • a combustion air-fuel mixture is brought to the ignition, whereby a Schugastrom arises.
  • the heating gas stream is expanded in the turbine, which drives the compressor and provides a net output.
  • the net power may be, for example, a shaft power for driving a generator in a power plant.
  • both gaseous fuels and liquid fuels can be burned in the combustion chamber. If a liquid fuel is used, it must be atomised to a pre-determined droplet size distribution and concentration in the combustion air before combustion. Conventionally, the atomization of liquid fuel is accomplished with a spray nozzle.
  • the atomizing nozzle is housed directly in the combustion chamber or in a premixing chamber. Due to the cramped conditions in the combustion chamber or the premixing chamber, it is necessary that the atomizing nozzle should only have a predetermined limited depth.
  • An atomizing nozzle constructed taking into account the limited structural depth has a limited atomizing effect, so that the atomizing nozzle with an additional swirl generating device is equipped to generate a twist in the liquid fuel-combustion air mixture.
  • a conventional atomizing nozzle with swirling is rotated from a solid material, milled and / or drilled, or alternatively manufactured in micro-laminate construction, which is costly.
  • the object of the present invention is to provide a swirl atomizing nozzle for atomizing liquid fuel, a method of manufacturing the swirl atomizing nozzle, and a nozzle for a gas turbine burner having the swirl atomizing nozzle, wherein the swirl atomizing nozzle and the nozzle are inexpensive to produce and effective in atomizing the liquid fuel.
  • the atomizing nozzle according to the invention for atomizing liquid fuel has a nozzle body which has a hollow cylinder with a bottom closing the wooden cylinder on one side and a final head of the hollow cylinder on the other side, so that in the nozzle body, a swirl chamber is formed, wherein in the Near the bottom in the hollow cylinder at least one inlet hole which is arranged in a plane perpendicular to the longitudinal axis of the hollow cylinder and employed at an angle in the circumferential direction of the hollow cylinder, and provided in the head lying on the longitudinal axis of the hollow cylinder outlet hole, so that a liquid through the inlet hole can be tangentially infiltrated into the swirl chamber by swirling and can be flowed out of the swirl chamber through the outlet opening.
  • the method according to the invention for producing the swirl atomizing nozzle comprises the steps of providing a hollow cylinder having a bottom closing the hollow cylinder on one side and an open longitudinal end on the other side, at least one in the vicinity of the bottom in the hollow cylinder Inlet hole, in a plane perpendicular to the longitudinal axis of the hollow cylinder and is arranged at an angle tangent to the circumference of the hollow cylinder employed, and seen in the longitudinal direction of the hollow cylinder between the inlet hole and the open longitudinal end optionally formed around the longitudinal axis of the hollow cylinder annular step on the outer circumference of the hollow cylinder, so that the outer diameter of the hollow cylinder relative to the Ring stage on the side of the inlet hole is smaller than on the side of the open longitudinal end; Providing a press having a retainer sleeve and a forming die formed by a cone and a base which is in alignment with the retainer sleeve; Inserting the blank with the soil in advance into the retaining sleeve until the
  • the nozzle assembly according to the invention for a gas turbine combustor has a conical section in which a nozzle chamber is formed, wherein in the cone section a Düsenstock pretaustrittsloch is provided, in which a Sputtering is inserted with its bottom projecting into the nozzle chamber, so that a liquid fuel-air mixture of the nozzle block chamber can be flowed in through the inlet hole with a swirling action into the swirl chamber and can be flowed out of the swirl chamber through the outlet opening out of the nozzle chamber.
  • the swirl atomizing nozzle can be produced cost-effectively with the method according to the invention and has a high atomization efficiency. Further, the liquid fuel-air mixture flows from the nozzle chamber through the swirl atomizing nozzle into the gas turbine combustor, and the swirl atomizing nozzle is accommodated in the cone portion of the nozzle body. As a result, the atomization of the liquid fuel caused by swirling takes place in the combustion air the cone section of the nozzle block by means of the swirl atomizing nozzle, whereby a high homogeneity of the droplet size distribution of the liquid fuel in the combustion air can be achieved. Thus, the atomization of the liquid fuel in the combustion air with the nozzle is effective.
  • the diameter-to-height ratio of the nozzle body is less than one.
  • the height of the nozzle body is small, so that the swirl atomizing nozzle has a low overall height. This is advantageous since only limited space is available in the nozzle chamber chamber outlet hole, so that the swirl atomizing nozzle according to the invention can be installed in the nozzle assembly according to the invention.
  • the swirl atomizing nozzle in a plane has two point-symmetrically arranged around the center of the hollow cylinder inlet holes, in particular holes and / or slots, having their longitudinal axes parallel to each other.
  • the plane is located closer to the ground than to the head.
  • position of the inlet holes in the swirl chamber effectively a swirl flow in the swirl chamber can be generated, so that the atomization effect of the swirl atomizing nozzle is high.
  • the blank can be supported on the holding sleeve in the manufacture of the swirl atomizing nozzle.
  • the bottom and the area of the blank between the annular step and the bottom are held by the holding sleeve, so that this area of the forming is not affected. Rather, the area of the blank is affected from the annular step to the open longitudinal end of the blank, so that an undesired bending of the blank in the region of the blank between the annular step and the ground in the preparation of the swirl atomizing nozzle can not occur.
  • the blank is a rotary part.
  • the blank is inexpensive to produce in large quantities.
  • the forming die is freely rotatably mounted about the axis of symmetry of its cone, so that the blank is roll-formed.
  • the blank can be processed with a large wall thickness.
  • the method of manufacturing the swirl atomizing nozzle includes the step of drilling the exit opening to a predetermined diameter.
  • the diameter of the outlet opening can advantageously be determined after the rolling deformation process.
  • the open longitudinal end is deformed inwards in such a way that the outlet opening is completely closed.
  • the method for producing the swirl-producing nozzle comprises the step of fabricating the inlet hole as a tangentially engaged slot and / or a tangentially set bore.
  • an inlet hole can advantageously be produced in the nozzle body of the swirl atomizing nozzle after completion of the rolling deformation of the nozzle body.
  • nozzle block a plurality of nozzle nozzle chamber outlet holes and the respective atomizing nozzles arranged therein are arranged distributed over the circumference of the cone section.
  • the swirl atomizing nozzle is caulked and / or soldered in the nozzle cavity exit hole.
  • the swirl atomizing nozzle is fixed stably and inexpensively in the nozzle floor chamber outlet hole.
  • a swirl atomizing nozzle 1 has a nozzle body 2, which is formed by a hollow cylinder 5 and a hollow cylinder 5 at one end of the bottom end 4 and a hollow cylinder 5 at the other end final head 6.
  • a swirl chamber 3 is formed by the hollow cylinder 5, the bottom 4 and the head 6.
  • a first inlet hole 7 and a second inlet hole 8 see Fig. 3 .
  • the inlet holes 7, 8 lie in a plane which is perpendicular to the longitudinal axis of the hollow cylinder 5 and in which the inlet holes 7, 8 are made in the same direction by an angle of attack 10 in the circumferential direction of the hollow cylinder 5. Further, the inlet holes 7, 8 are arranged point-symmetrically about the longitudinal axis of the hollow cylinder 5, wherein the longitudinal axes of the inlet holes 7, 8 are parallel to each other. As a result, the inlet holes 7, 8 open tangentially into the swirl chamber 3 and are arranged opposite to each other, so that, when through the inlet holes 7, 8 a liquid fuel-air mixture is flowed into the swirl chamber 3, in the swirl chamber 3 is acted upon by a twist Flow trains.
  • an outlet hole 9 is provided, wherein the longitudinal axis of the outlet hole 6 coincides with that of the hollow cylinder 5.
  • the atomization is selectively adjustable.
  • the head 6 adjoins the hollow cylinder 5 with a rounding 13 and the outer peripheral edge of the outlet hole 9 seen from the swirl chamber 3 is provided with a chamfer 14.
  • the nozzle body 2 is equipped with round contours on the head side.
  • this is provided with a circumferential annular step 11, wherein the region of the hollow cylinder 5 from the annular step 11 to the bottom 4 has a smaller outer diameter than the region of the hollow cylinder 5 from the annular step 11 to the head 6 back.
  • FIGS. 2 and 3 a blank 12 of the swirl atomizing nozzle 1 is shown.
  • the blank 12 differs from the nozzle body 2 of the swirl atomizing nozzle 1 in that the Head 6 is not yet formed. Rather, the blank 6 with the bottom 4 has the shape of a semi-closed hollow cylinder having an open longitudinal end 16 with an opening 15.
  • a press 15 with a holding sleeve 18 and a forming die 19 is shown.
  • the sleeve 18 has a recess which is modeled on the shape of the blank in the region of the annular step 11 to the bottom 4 out.
  • the recess of the blank 12 is inserted, wherein the blank 12 is supported on the annular step 11 on the holding sleeve 18 and the inlet holes 7, 8 are covered by the holding sleeve 18.
  • the open longitudinal end 16 of the blank 12 protrudes from the holding sleeve 18 and is arranged facing the forming die 19.
  • the circumferential punch 19 has on its side facing the longitudinal end 16 a cone 20 whose longitudinal axis coincides with the longitudinal axis of the holding sleeve 18, wherein the cone 20 is bridged in its central region by a base 21 which is perpendicular to the longitudinal axis of the cone 20.
  • the cone 20 and the base 21 are designed such that when the holding sleeve 18 is moved in the direction of the forming die 19 parallel to its longitudinal axis, the longitudinal end 16 abuts the cone 20 and slides inwardly toward the longitudinal axis of the holding sleeve 19 , Finally, the open longitudinal end 16 passes under rolling deformation on the base 21, whereby the head 6 is formed with its rounding 13, wherein the outlet hole 9 in the region of the longitudinal axis of the holding sleeve 18 remains.
  • a nozzle assembly 22 is shown in the interior of which a nozzle chamber 23 is formed.
  • the liquid fuel flows through a nozzle chamber inlet opening 24 into the nozzle chamber 23.
  • the nozzle assembly 22 has a cylinder portion 25 and a cone portion 26, wherein the nozzle chamber 23 is formed both in the cylinder portion 25 and in the cone portion 26 and the cone portion 26 forms a conclusion of the nozzle chamber 23.
  • the conical section 26 are arranged uniformly distributed over the circumference Düsenstock pretaustrittslöcher 27, in each of which a swirl atomizing nozzle 1 is housed.
  • the swirl atomizing nozzle 1 is accommodated in the nozzle floor chamber outlet hole 27 so that the head 6 is flush with the outer surface of the cone portion 26 and the area of the nozzle body 2 protrudes into the nozzle chamber 23 in which the inlet holes 7, 8 and the bottom 4 are provided.
  • the liquid contained in the nozzle chamber 23 enters the swirl chamber 3 through the inlet holes 7, 8 to form a swirling flow, and re-flows out of the outlet hole 9 with a predetermined atomization of the liquid fuel and is supplied to a combustion chamber arranged downstream.
  • the air is mixed by cross-flow to the outlet of the atomized liquid with this prior to combustion.
  • the swirl atomizing nozzles 1 are pierced into the Düsenstockammeraustrittslöcher 27 and / or soldered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Nozzles (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Spray-Type Burners (AREA)
  • Forging (AREA)
EP08006681A 2008-04-01 2008-04-01 Drallzerstäubungsdüse zur Zerstäubung von Flüssigbrennstoff und Herstellungsverfahren derselben, Düsenstock für einen Brenner mit der Drallzerstäubungsdüse Withdrawn EP2107304A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP08006681A EP2107304A1 (de) 2008-04-01 2008-04-01 Drallzerstäubungsdüse zur Zerstäubung von Flüssigbrennstoff und Herstellungsverfahren derselben, Düsenstock für einen Brenner mit der Drallzerstäubungsdüse
US12/935,027 US20110024517A1 (en) 2008-04-01 2009-03-23 Swirl spraying nozzle for sprayng liquid fuel, and method of producing same, and a nozzle assembly for a burner with the swirl spraying nozzle
PCT/EP2009/053361 WO2009121743A1 (de) 2008-04-01 2009-03-23 Drallzerstäubungsdüse zur zerstäubung von flüssigbrennstoff und herstellungsverfahren derselben, düsenstock für einen brenner mit der drallzerstäubungsdüse
JP2011502336A JP5230795B2 (ja) 2008-04-01 2009-03-23 液体燃料を噴霧するための渦巻噴霧ノズル、渦巻噴霧ノズルの製造方法、及び渦巻噴霧ノズルを備えたバーナ用ノズル組立体
EP09726964A EP2257741A1 (de) 2008-04-01 2009-03-23 Drallzerstäubungsdüse zur zerstäubung von flüssigbrennstoff und herstellungsverfahren derselben, düsenstock für einen brenner mit der drallzerstäubungsdüse
RU2010144475/02A RU2492959C2 (ru) 2008-04-01 2009-03-23 Способ изготовления вихревой распылительной форсунки для распыления жидкого топлива

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08006681A EP2107304A1 (de) 2008-04-01 2008-04-01 Drallzerstäubungsdüse zur Zerstäubung von Flüssigbrennstoff und Herstellungsverfahren derselben, Düsenstock für einen Brenner mit der Drallzerstäubungsdüse

Publications (1)

Publication Number Publication Date
EP2107304A1 true EP2107304A1 (de) 2009-10-07

Family

ID=39884551

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08006681A Withdrawn EP2107304A1 (de) 2008-04-01 2008-04-01 Drallzerstäubungsdüse zur Zerstäubung von Flüssigbrennstoff und Herstellungsverfahren derselben, Düsenstock für einen Brenner mit der Drallzerstäubungsdüse
EP09726964A Withdrawn EP2257741A1 (de) 2008-04-01 2009-03-23 Drallzerstäubungsdüse zur zerstäubung von flüssigbrennstoff und herstellungsverfahren derselben, düsenstock für einen brenner mit der drallzerstäubungsdüse

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09726964A Withdrawn EP2257741A1 (de) 2008-04-01 2009-03-23 Drallzerstäubungsdüse zur zerstäubung von flüssigbrennstoff und herstellungsverfahren derselben, düsenstock für einen brenner mit der drallzerstäubungsdüse

Country Status (5)

Country Link
US (1) US20110024517A1 (ja)
EP (2) EP2107304A1 (ja)
JP (1) JP5230795B2 (ja)
RU (1) RU2492959C2 (ja)
WO (1) WO2009121743A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402653A1 (en) * 2010-07-02 2012-01-04 Siemens Aktiengesellschaft Swirled fuel injection

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101940335B1 (ko) * 2013-05-07 2019-01-18 현대중공업 주식회사 우레아 분사 노즐
KR101631891B1 (ko) * 2014-12-18 2016-06-20 한국항공우주연구원 핀틀-스월 혼합형 추진제 분사장치
US10060628B2 (en) * 2015-03-26 2018-08-28 General Electric Company Systems and methods for creating a seal about a liquid fuel injector in a gas turbine engine
US20170058742A1 (en) * 2015-08-28 2017-03-02 General Electric Company Methods and systems related to selective catalytic reduction
RU2639704C1 (ru) * 2016-12-19 2017-12-21 Олег Савельевич Кочетов Форсунка вихревая

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE916971C (de) * 1950-02-19 1954-08-23 Siemens Ag Zerstaeubungsduese, insbesondere fuer fluessige Brennstoffe
DE1451351A1 (de) * 1964-02-13 1969-01-30 Versuchsanstalt Fuer Luftfahrt Zerstaeubungsdrallduese mit nur einem Drallkanal
DE4338202A1 (de) * 1993-11-09 1995-05-11 Vdo Schindling Düse für einen Brenner einer mit Kraftstoff betriebenen Heizung für einen Katalysator eines Kraftfahrzeugs
WO1999019670A2 (en) * 1997-10-10 1999-04-22 Siemens Westinghouse Power Corporation FUEL NOZZLE ASSEMBLY FOR A LOW NOx COMBUSTOR
US6595558B2 (en) * 2000-05-29 2003-07-22 Usui Kokusai Sangyo Kaisha Limited High-pressure metal pipe with connection head, method of forming the head and connection washer for the connection head
US20070029408A1 (en) * 2005-08-02 2007-02-08 Aerojet-General Corporation Throttleable swirling injector for combustion chambers

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US2628867A (en) * 1948-01-07 1953-02-17 Gen Motors Corp Duplex nozzle
JPS49146512U (ja) * 1973-04-13 1974-12-18
JPS52145832A (en) * 1976-05-31 1977-12-05 Nissan Motor Co Ltd Pressure type swirl jet valve in burner
DE8621135U1 (de) * 1985-09-02 1987-01-29 Callahan, George Edgar, Prof., 40479 Düsseldorf Sprühvorrichtung zum Aufsetzen auf einen zusammenpressbaren Behälter
RU2117177C1 (ru) * 1995-08-25 1998-08-10 Научно-исследовательский институт машиностроения Главного управления ракетно-космической техники Комитета по оборонным отраслям промышленности Способ изготовления струйной форсунки
AU2003269842A1 (en) * 2002-10-07 2004-04-23 Man B And W Diesel A/S Method of manufacturing a nozzle for a fuel valve in a diesel engine, and a nozzle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE916971C (de) * 1950-02-19 1954-08-23 Siemens Ag Zerstaeubungsduese, insbesondere fuer fluessige Brennstoffe
DE1451351A1 (de) * 1964-02-13 1969-01-30 Versuchsanstalt Fuer Luftfahrt Zerstaeubungsdrallduese mit nur einem Drallkanal
DE4338202A1 (de) * 1993-11-09 1995-05-11 Vdo Schindling Düse für einen Brenner einer mit Kraftstoff betriebenen Heizung für einen Katalysator eines Kraftfahrzeugs
WO1999019670A2 (en) * 1997-10-10 1999-04-22 Siemens Westinghouse Power Corporation FUEL NOZZLE ASSEMBLY FOR A LOW NOx COMBUSTOR
US6595558B2 (en) * 2000-05-29 2003-07-22 Usui Kokusai Sangyo Kaisha Limited High-pressure metal pipe with connection head, method of forming the head and connection washer for the connection head
US20070029408A1 (en) * 2005-08-02 2007-02-08 Aerojet-General Corporation Throttleable swirling injector for combustion chambers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402653A1 (en) * 2010-07-02 2012-01-04 Siemens Aktiengesellschaft Swirled fuel injection
WO2012000792A1 (en) * 2010-07-02 2012-01-05 Siemens Aktiengesellschaft Swirled fuel injection
US9212819B2 (en) 2010-07-02 2015-12-15 Siemens Aktiengesellschaft Swirled fuel injection

Also Published As

Publication number Publication date
JP2011517761A (ja) 2011-06-16
EP2257741A1 (de) 2010-12-08
US20110024517A1 (en) 2011-02-03
RU2010144475A (ru) 2012-05-10
RU2492959C2 (ru) 2013-09-20
WO2009121743A1 (de) 2009-10-08
JP5230795B2 (ja) 2013-07-10

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