EP0892212A2 - Druckzerstäuberdüse - Google Patents
Druckzerstäuberdüse Download PDFInfo
- Publication number
- EP0892212A2 EP0892212A2 EP98810650A EP98810650A EP0892212A2 EP 0892212 A2 EP0892212 A2 EP 0892212A2 EP 98810650 A EP98810650 A EP 98810650A EP 98810650 A EP98810650 A EP 98810650A EP 0892212 A2 EP0892212 A2 EP 0892212A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- bore
- liquid
- outlet bore
- nozzle outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title description 12
- 239000007788 liquid Substances 0.000 claims description 47
- 239000000945 filler Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 22
- 238000000889 atomisation Methods 0.000 description 12
- 239000003921 oil Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010053615 Thermal burn Diseases 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 206010016754 Flashback Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3478—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet the liquid flowing at least two different courses before reaching the swirl chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
- B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
- B05B1/3442—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a cone having the same axis as the outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
-
- 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 the field of combustion technology. It affects a pressure atomizing nozzle, comprising a nozzle body with a mixing chamber, which is connected to an outside space via a nozzle bore.
- the nozzle body has a first feed channel for a liquid to be atomized through which said liquid is under pressure and swirl-free Chamber can be fed. At least one opens into the chamber of the nozzle body another supply channel for part of the liquid to be atomized or for one second liquid to be atomized, through which said part of the liquid or the second liquid can be supplied under pressure and with swirl.
- Such Nozzle is known for example from DE 196 08 349.4.
- Atomizer burners are known in which the oil that is burned mechanically finely distributed. It is divided into fine droplets of approx. 10 to 400 ⁇ m Disassembled diameter (oil mist), which is mixed with the combustion air in evaporate and burn the flame.
- pressure atomizers see Lueger - Lexicon of technology, Deutsche Verlags-Anstalt Stuttgart, 1965, volume 7, p.600
- the oil is supplied to an atomizing nozzle under high pressure by an oil pump.
- the oil gets into a through essentially tangential slots Swirl chamber and leaves the nozzle through a nozzle bore. This ensures that the oil particles have two motion components, one axial and one radial, preserved.
- the one emerging from the nozzle bore as a rotating hollow cylinder Oil film expands to a hollow cone due to centrifugal force Edges vibrate unstably and tear into small oil droplets.
- the atomized oil forms a cone with a more or less large opening angle.
- Swirl nozzles pressure atomizers
- air-assisted atomizers of the known types with a pressure up to approx. 100 bar are hardly suitable because they do not allow small spreading angle, the atomization quality is restricted and the impulse of the drop spray is low.
- swirl-stabilized burners e.g. double-cone type burners
- the flame stabilization is achieved
- the fuel is atomized into the flow, which is what easiest to do with a pressure atomizing nozzle.
- droplets exposed to a swirl flow field can cause one The droplets are thrown out due to the centrifugal forces (cyclone effect). Wetting the swirl generator or the mixing tube walls would have Consequence that the mixture deteriorates and that there is a risk of flashback along the walls and the appearance of deposits due to Fuel decomposition occurs.
- An improvement is with the high pressure atomizing nozzle known from EP 0 496 016 B1 to reach.
- This consists of a nozzle body in which a turbulence chamber is formed which has at least one nozzle bore communicates with an outside space, and which have at least one Has supply channel for the liquid to be atomized under pressure. It is characterized in that the cross-sectional area of the turbulence chamber mouth is larger by a factor of 2 to 10 than that Cross-sectional area of the nozzle bore.
- the aim is to if possible over the entire load range of the gas turbine (approx. 10% to 120% Mass flow of fuel based on nominal load conditions) a drop spray generate a stable, low-emission combustion throughout the area in a given air flow field.
- the invention tries to avoid all of these disadvantages.
- a Methods for effective operation of this pressure atomizing nozzle are proposed become.
- a pressure atomizing nozzle comprising a Nozzle body, in which a mixing chamber is formed, which has a Nozzle outlet bore communicates with an outside space and a first one Feed channel with a feed hole for a liquid to be atomized , through which said liquid can be supplied swirl-free and under pressure, wherein in the chamber at least one additional supply channel for part of the atomizing liquid or for a second liquid to be atomized, through which said part of the liquid or the second liquid under Pressure and swirl can be fed, the feed bore of the first feed channel lies on one axis with the nozzle outlet bore, thereby achieved that the outlet-side diameter of the nozzle outlet bore is at most so is as large as the diameter of the feed bore and the length of the nozzle outlet bore at least 2 to a maximum of 10 times the outlet side Diameter of the nozzle outlet bore.
- the advantages of the invention include that it enables the possibility is given, the spray angle of the nozzle to an extremely small angle, i.e. up to a full jet without reducing disturbing turbulence. So that will the peculiarities of the swirl flow field of a swirl-stabilized burner Taken into account. On the other hand, the operation of a conventional one atomizing pressure atomizer nozzle can be maintained. Between these Extreme is a sliding control, the setting of all operating conditions, i.e. Spray angles and degrees of atomization possible.
- the pressure atomizer nozzle has an outlet side Has diameter of the nozzle outlet bore, which is smaller than that Diameter of the feed hole, in particular it should be approximately 0.7 times the Diameter of the feed hole. This will make a bigger part of the total pressure drop across the outlet opening, resulting in a high Stability of the full jet leads.
- an embodiment variant is advantageous in which the nozzle outlet bore is arranged in the cover of a first tube, in which a second tube smaller outer diameter is used, up to the said lid is sufficient, and at least one slot in the cover-side end of the second tube is provided, which is made tangential and forms a swirl channel and which is the annulus between the first and second tubes with the chamber connects, from which the nozzle outlet bore leads into the outside space, the chamber being essentially through the lid, the inner walls of the second Pipe and a filler in the second pipe is limited, and the feed hole arranged in the filler on the same axis as the nozzle outlet bore is.
- This nozzle is characterized by a simple design.
- a pressure atomizing nozzle according to the invention is advantageously used, whose nozzle outlet bore is constant over its entire length Has cross-sectional area. This is very easy to manufacture.
- the nozzle outlet bore over their entire length in the direction of flow has a continuously decreasing cross-sectional area, so due to the converging Partly advantageous in the swirl stage, a uniform acceleration of the liquid to be atomized.
- the friction losses are less than in an embodiment in which a nozzle with a constant cross section of the Nozzle outlet bore is provided.
- the pressure atomizing nozzle according to the invention has a Nozzle outlet bore, which has an inlet radius at its inlet end has at least as large as the radius of the mixing chamber. This prevents the flow from detaching at the inlet into the outlet bore and thereby loss of flow or at high speeds possible cavitation prevented.
- FIGS. 1 to 3 show a first embodiment of the invention, with Fig. 1 the Pressure atomizer nozzle in a partial longitudinal section and FIGS. 2 and 3 two Show cross sections in different planes.
- the pressure atomizing nozzle comprises a nozzle body 30, consisting of a first tube 31, which is closed at its end seen in the direction of flow by a conical cover 32. In the middle of the cover 32 there is a nozzle bore 33, the longitudinal axis of which is designated by 34. According to the invention, the length of the nozzle outlet bore is at least 2 to a maximum of 10 times the diameter on the outlet side of the nozzle outlet bore.
- a second tube 35 which has a smaller outside diameter than the inside diameter of the first tube 31, is inserted into the tube 31 and extends as far as the cover 32 and lies thereon.
- the annular space 36 between the two tubes 31 and 35 serves to supply the or a part of the liquid 37 to be atomized.
- the end of the tube 35 resting on the cover 32 is provided with four tangentially arranged slots 38 which connect the annular space 36 to produce a chamber 39 which serves as a swirl chamber for the liquid 37 to be atomized flowing through the slots 38.
- the chamber 39 is delimited by the inner walls of the cover 32 and the second tube 35, and by a filler 40 which is inserted in the interior of the second tube 35 and fastened therein. This filler 40 is located at the same height as the upper edge of the slots 38, but it can also be spaced from the upper edge of the slots 38 in another embodiment variant, not shown.
- the feed bore 41 lies with the nozzle outlet bore 33 on the same axis 34.
- the feed bore 41 has a constant diameter d z over its entire length L. This diameter d z is dimensioned somewhat larger than the diameter d a of the nozzle outlet bore 33.
- the ratio of d a to d z should preferably be about 0.7. Then a good stability of the full jet is achieved when the nozzle is operated in the full jet stage, because a larger part of the total pressure drop occurs via the nozzle outlet bore.
- the ratio of length L to the outlet-side diameter d a of the nozzle outlet bore 33 is also of particular importance for the function of the nozzle. According to the invention, it is in a range from 2 to 10. If the length-to-diameter ratio is too high, the twist becomes degraded too much from the swirl stage and the atomization in the pressure atomizer operation is insufficient. If the ratio of the length to the diameter of the nozzle outlet bore 33 is too small, on the other hand, the full jet has too great a divergence, which can lead to undesired ejection of drops.
- the pressure atomizing nozzle according to the invention thus has two stages - one Full jet stage (see Fig. 2) and a pressure swirl stage (see Fig. 3), depending on the requirements can be operated either together or individually.
- the pressure atomizing nozzle also be provided with more or fewer slots 38.
- slots 38 There is also one other distribution of the channels over the circumference possible.
- Other swirl generators, for example blades, can also be arranged in the channel 36 be that ensure that the liquid to be atomized comes out of the channel 36 swirls into the chamber 39 enters.
- FIG. 4 shows in a partial longitudinal section a second exemplary embodiment of an inventive one two-stage pressure atomizer nozzle with full jet stage and swirl stage.
- the structure of the nozzle differs from the embodiment described above only in that the nozzle outlet bore 33 does not have a constant Has diameter, but that the diameter seen in the direction of flow over the entire length L of the nozzle outlet bore to the actual one Exit steadily decreases.
- This has compared to the first embodiment the additional advantages that a smooth acceleration of the liquid flow in the nozzle that occurs the friction losses in the swirl stage be reduced so that no turbulence occurs in the full jet stage or possibly existing ones are broken down and that the atomization of the liquid is suppressed becomes.
- FIG. 5 shows in a partial longitudinal section a third exemplary embodiment of a two-stage pressure atomizer nozzle according to the invention with a full jet stage and a swirl stage.
- the structure of the nozzle differs from the first exemplary embodiment described above only in that here too the nozzle outlet bore 33 has no constant diameter.
- the nozzle outlet bore has an inlet radius R e which should be approximately as large as the radius R k of the chamber 39.
- R e which should be approximately as large as the radius R k of the chamber 39.
- the nozzle according to the invention can be swirl-stabilized, for example Gas turbine or boiler burners, e.g. a burner of the double cone type, installed and to the requirements of the respective burner flow field or Operating conditions of the gas turbine combustion chamber or the boiler adjusted if necessary, also during operation.
- the nozzle is operated via the pressure swirl stage, by the liquid 37, in this case fuel, via the feed channel 36 and the swirl channel 38 (or via a swirl generator arranged in the channel 36) below high pressure and swirl enters the chamber 39 and through the nozzle outlet bore 33 is injected into the combustion chamber as a finely atomized drop.
- the rotating movement causes a hollow cone flow at the nozzle bore 33 generated.
- Both stages can be operated simultaneously, then takes place in the chamber 39 a mixture of the two fuel flows instead.
- the nozzle can also be in only one Stage operated. As extremely small as possible at full load and overload Spray angle should be set, for example, only the full jet level used, and the fuel mass flow flowing through the swirl channels 38 is completely switched off. It is also possible, depending on the load range different liquids, e.g. Water and oil, through channels 36, 38 and 42, 41 to feed the chamber 39 and atomize after their mixing.
- liquids e.g. Water and oil
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
- Nozzles (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
Description
- Fig. 1
- einen Teillängsschnitt einer erfindungsgemässen Druckzerstäuberdüse mit Vollstrahlstufe und Drallstufe in einer ersten Ausführungsvariante;
- Fig. 2
- einen Querschnitt der Druckzerstäuberdüse nach Fig. 1 im Bereich der Vollstrahlstufe entlang der Linie II-II;
- Fig. 3
- einen Querschnitt der Druckzerstäuberdüse nach Fig. 1 im Bereich der Drallstufe entlang der Linie III-III;
- Fig. 4
- einen Teillängsschnitt einer erfindungsgemässen Druckzerstäuberdüse mit Vollstrahlstufe und Drallstufe in einer zweiten Ausführungsvariante;
- Fig. 5
- einen Teillängsschnitt einer erfindungsgemässen Druckzerstäuberdüse mit Vollstrahlstufe und Drallstufe in einer dritten Ausführungsvariante.
- 30
- Düsenkörper
- 31
- erstes Rohr
- 32
- Deckel von Pos. 31
- 33
- Düsenaustrittsbohrung
- 34
- Längsachse der Düse
- 35
- zweites Rohr
- 36
- Ringraum zwischen Pos. 31 und 35
- 37
- zu zerstäubende Flüssigkeit
- 37'
- zweite zu zerstäubende Flüssigkeit
- 38
- tangential angestellter Schlitz
- 39
- Drallkammer
- 40
- Füllstück
- 41
- Zuführungbohrung
- 42
- Zufuhrkanal
- L
- Länge von Pos. 33
- da
- Durchmesser von Pos. 33
- dz
- Durchmesser von Pos. 41
- Re
- Einlaufradius von Pos. 33
- Rk
- Radius von Pos. 39
Claims (10)
- Druckzerstäuberdüse, umfassend einen Düsenkörper (30), in welchem eine Mischkammer (39) ausgebildet ist, welche über eine Düsenaustrittsbohrung (33) mit einem Aussenraum in Verbindung steht und einen ersten Zufuhrkanal (42) mit einer Zuführung bohrung (41) für eine zu zerstäubende Flüssigkeit (37) aufweist, durch welche besagte Flüssigkeit (37) drallfrei und unter Druck zuführbar ist, wobei in die Kammer (39) mindestens ein weiterer Zufuhrkanal (36) für einen Teil der zu zerstäubenden Flüssigkeit (37) oder für eine zweite zu zerstäubende Flüssigkeit (37') mündet, durch welchen besagter Teil der Flüssigkeit (37) oder die zweite Flüssigkeit (37') unter Druck und mit Drall zuführbar ist, wobei die Zuführungsbohrung (41) des ersten Zufuhrkanales (42) mit der Düsenaustrittsbohrung (33) auf einer Achse (34) liegt, dadurch gekennzeichnet, dassa) der austrittsseitige Durchmesser (da) der Düsenaustrittsbohrung (33) höchstens so gross ist wie der Durchmesser (dz) der Zuführungsbohrung (41) undb) die Länge (L) der Düsenaustrittsbohrung (33) mindestens das 2- bis maximal 10-fache des austrittsseitigen Durchmessers (da) der Düsenaustrittsbohrung (33) beträgt.
- Druckzerstäuberdüse nach Anspruch 1, dadurch gekennzeichnet, dass der austrittsseitige Durchmesser (da) der Düsenaustrittsbohrung (33) ca. das 0,7-fache des Durchmessers (dz) der Zuführungsbohrung (41) beträgt.
- Druckzerstäuberdüse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Düsenaustrittsbohrung (33) im Deckel (32) eines ersten Rohres (31) angeordnet ist, in welchem ein zweites Rohr (35) kleineren Aussendurchmessers eingesetzt ist, das bis zu dem besagten Deckel (32) reicht, und im deckelseitigen Ende des zweiten Rohres (35) mindestens ein Schlitz (38) vorgesehen ist, welcher tangential angestellt ist und einen Drallkanal bildet und welcher den Ringraum (36) zwischen den ersten (31) und dem zweiten Rohr (35) mit der Kammer (39) verbindet, von welcher die Düsenaustrittsbohrung (33) in den Aussenraum führt, wobei die Kammer (39) im wesentlichen durch den Deckel (32), die Innenwände des zweiten Rohres (35) und ein Füllstück (40) im zweiten Rohr (35) begrenzt ist, und die Zuführungsbohrung (41) im Füllstück (40) auf der gleichen Achse (34) wie die Düsenaustrittsbohrung (33) angeordnet ist.
- Druckzerstäuberdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Düsenaustrittsbohrung (33) über ihre Gesamtlänge (L) eine konstante Querschnittsfläche aufweist.
- Druckzerstäuberdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Düsenaustrittsbohrung (33) über ihre Gesamtlänge (L) eine in Strömungsrichtung stetig abnehmende Querschnittsfläche aufweist.
- Druckzerstäuberdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Düsenaustrittsbohrung (33) an ihrem einlaufseitigen Ende einen Einlaufradius (Ra) aufweist, welcher mindestens so gross ist wie der Radius (Rk) der Kammer (39).
- Verfahren zum Betrieb einer Druckzerstäuberdüse nach einem der Ansprüche 1 bis 6 in einem drallstabilisierten Brenner, wobei beim Zünden und im Teillastbetrieb die Düse über eine Druckdrallstufe betrieben wird, indem ein Teil der zu zerstäubenden Flüssigkeit (37) oder ein Teil der zu zerstäubenden Flüssigkeit (37') über den Zufuhrkanal (38) verdrallt der Kammer (39) zugeführt und dort eine stark verdrallte Strömung erzeugt wird, welche anschliessend durch die Düsenaustrittsbohrung (33) in den Aussenraum gelangt, wobei der Anteil der über die Drallstufe zugeführten Flüssigkeit (37, 37') mit zunehmenden Gesamtflüssigkeitsmassenstrom verringert wird, dadurch gekennzeichnet, dass die Düse bei Voll- und Überlastbetrieb über eine Vollstrahlstufe betrieben wird, indem die Flüssigkeit (37) über die Zuführungsbohrung (41) der Kammer (39) zugeführt wird und von dort aus durch die Düsenaustrittsbohrung (33) als Vollstrahl in den Aussenraum gelangt.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass zwischen beiden Stufen gleitend umgeschalten wird.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass beide Stufen gleichzeitig und im Durchsatz variierbar betrieben werden.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass nur eine der beiden Stufen betrieben wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19730617A DE19730617A1 (de) | 1997-07-17 | 1997-07-17 | Druckzerstäuberdüse |
DE19730617 | 1997-07-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0892212A2 true EP0892212A2 (de) | 1999-01-20 |
EP0892212A3 EP0892212A3 (de) | 1999-02-10 |
EP0892212B1 EP0892212B1 (de) | 2003-04-09 |
Family
ID=7835979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810650A Expired - Lifetime EP0892212B1 (de) | 1997-07-17 | 1998-07-08 | Druckzerstäuberdüse |
Country Status (4)
Country | Link |
---|---|
US (1) | US6045058A (de) |
EP (1) | EP0892212B1 (de) |
JP (1) | JP4049893B2 (de) |
DE (2) | DE19730617A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012006769A1 (zh) * | 2010-07-13 | 2012-01-19 | Tang Bingsheng | 全能分控低碳水嘴 |
CN112474093A (zh) * | 2020-11-23 | 2021-03-12 | 中国科学技术大学 | 一种基于复合流协同的射流增程方法及装置 |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2772118B1 (fr) * | 1997-12-05 | 2001-08-17 | Saint Gobain Vitrage | Procede de combustion et bruleur a pulverisation de combustible mettant en oeuvre un tel procede |
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CN112474093A (zh) * | 2020-11-23 | 2021-03-12 | 中国科学技术大学 | 一种基于复合流协同的射流增程方法及装置 |
Also Published As
Publication number | Publication date |
---|---|
DE19730617A1 (de) | 1999-01-21 |
EP0892212B1 (de) | 2003-04-09 |
EP0892212A3 (de) | 1999-02-10 |
DE59807805D1 (de) | 2003-05-15 |
US6045058A (en) | 2000-04-04 |
JPH1172205A (ja) | 1999-03-16 |
JP4049893B2 (ja) | 2008-02-20 |
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