CN205065799U - A flame holder for combustion chamber and combustion chamber thereof - Google Patents
A flame holder for combustion chamber and combustion chamber thereof Download PDFInfo
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- CN205065799U CN205065799U CN201520589391.5U CN201520589391U CN205065799U CN 205065799 U CN205065799 U CN 205065799U CN 201520589391 U CN201520589391 U CN 201520589391U CN 205065799 U CN205065799 U CN 205065799U
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- combustion chamber
- whirlpool
- hub
- flameholder
- leading portion
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Abstract
The utility model discloses a flame holder to and including this flame holder's combustion chamber, flame holder stays whirlpool and outer loop swirler including the center, and outer loop swirler is by outer loop hub, inner ring hub and a plurality of crooked blades, and a plurality of camber bladess evenly connect between the inner and outer ring hub with 40-60 entry clamping angle, and anterior segment, middle section and the back end of center body in the whirlpool constitute annular cavity in the whirlpool, interior wheel hub and the central anterior segment of the body in whirlpool outer wall constitution runner, novel flame holder is located between combustion chamber expansion section and the combustor basket, is provided with the cooling water passageway in the burner inner liner and is used for the cooling. The utility model discloses a flame holder can make the thermal capacitance intensity of combustion chamber higher, and flame failure limit is lower, and incoming flow speed can be bigger, and variable working condition adaptability is stronger, makes the combustion chamber structure compacter, also reduces flow losses simultaneously.
Description
Technical field
The utility model belongs to gas-turbine combustion chamber field, more specifically, relates to a kind of flameholder for combustion chamber and combustion chamber thereof.
Background technology
Gas-turbine combustion chamber head tissue is the major part affecting chamber performance, and cyclone is the critical component of head of combustion chamber, it is a kind of effective means of turbine gas turbine overheavy firing, produce significant impact to gas-turbine combustion chamber burning, its performance directly has influence on combustion chamber operational and performance.So very important to the research of cyclone.
Cyclone is arranged on gas-turbine combustion chamber leading portion, its Main Function is: produce recirculating zone at head of combustion chamber, increase the relative velocity of air-flow and oil droplet, promote combustion oil atomization, enable the blending better of air and fuel oil, make high-temperature fuel gas reflux simultaneously, form the flame on duty of stability and high efficiency in recirculating zone, stabilize the flame, improve efficiency of combustion.
The structure working principle of existing cyclone be force in air-flow passage between the blades flow through after exit produce tangential velocity, thus can powerful eddy flow be produced, eddy flow makes the air at cyclone outlet place flow to surrounding due to centrifugal action, causes the behind of cyclone outlet can form a low-pressure area.Like this, can in the cyclone recirculating zone that appearance one is contrary with mainstream speed behind under the effect of pressure differential.
The weak point of current turbulent burner is mainly manifested in: 1) responsive to incoming flow, incoming flow is easy to affect flame holding; 2) single-stage cyclone is to combustion chamber variable working condition bad adaptability, Multi-stage spiral device then complex structure; 3) flame failure limit scope is narrower; 4) the airflow inlet flow velocity allowed is low, is generally less than 20m/s, and speed higher combustion chamber in combustion chamber needs the expansion segment length more grown.5) in order to solve the requirement of high heat capacity than combustion chamber, need to use Multi-stage spiral device, complex structure.
Along with the development of aero-engine, the aero-turbine being at present greater than 10 along with thrust-weight ratio is had higher requirement to combustion chamber, specifically 1) higher heat capacity ratio, namely under declared working condition, oil-gas ratio is higher, this just requires that the air inlet except cold gas all enters from head of combustion chamber, air-flow velocity is high, and during variable working condition, change in flow scope strengthens; 2) broader oil-gas ratio, because the air inlet except cold gas all enters from head of combustion chamber, when low operating mode, the oil-gas ratio of combustion zone is lower; 3) more compact structure, shortens chamber length as far as possible.More than require to cause the variable working condition of combustion chamber wider, inlet velocity increases, and flame failure limit reduces, and the length of flame is shorter.And existing turbulent burner will more be difficult to tackle above-mentioned requirements.
Utility model content
For above defect or the Improvement requirement of prior art, the utility model provides a kind of flameholder and combustion chamber thereof, its object is to utilize center body in whirlpool and the textural association with outer shroud cyclone, solve the smooth combustion problem of flame under various complicated condition thus.
For achieving the above object, according to an aspect of the present utility model, a kind of flameholder is provided, comprise center body in whirlpool and the outer shroud cyclone of coaxial setting, it is characterized in that, described outer shroud cyclone is annular, is made up of from the inside to the outside inner ring hub, camber blades and outer shroud hub; Described multiple camber blades are evenly arranged between inner ring hub and outer shroud hub, and the entrance established angle of each camber blades is 40 ° ~ 60 °, camber blades for strengthening the mixing effect of air and fuel oil, enhanced burning efficiency; Described center body in whirlpool is divided into leading portion, stage casing and back segment in the axial direction, described back segment is disc or cylinder, stage casing and leading portion are respectively cylinder, described leading portion is fixed in inner wheel hub, with the inwall looping runner of inner wheel hub, be atomized for making the main fuel of injection and the main combustion district under high operating mode is provided.
Preferably, described back segment is disc, the diameter in described stage casing is less than the diameter of leading portion and back segment, and the cavity in whirlpool of leading portion rear wall, stage casing outer wall and the common looping of back segment antetheca, for reducing air velocity and the primary combustion zone providing flame on duty.
Preferably, described multiple camber blades are 10 ~ 16, and entrance established angle is 45 °.
According to another aspect of the present utility model, additionally provide a kind of combustion chamber comprising above-mentioned flameholder, it is characterized in that, comprise expansion segment and the burner inner liner of coaxial connection from front to back, the passage of described expansion segment for providing air-flow to enter outer shroud cyclone, the front end that described flameholder is positioned at described burner inner liner is inner.
Preferably, described expansion segment is divided into conical section and steady section from front to back in the axial direction, described conical section is truncated cone-shaped, steady section is cylindrical shape, the angle of flare of described conical section is 13 ° ~ 15 °, its top is docked with steady section (22), and bottom, as the entrance of air-flow, is connected with the gas pipeline of ventilation blower.
Preferably, described burner inner liner forms by inner barrel and outer cylinder body are coaxially nested, between inner barrel and outer cylinder body, interlayer is cooling-water duct, the rear and front end of outer cylinder body outer wall is respectively arranged with inlet opening and apopore, multiple inspection section is communicated with outside and the inner barrel inner space of outer cylinder body, the opening of inspection section on outer cylinder body forms peep hole, for observing the flame in combustion chamber.
In general, the above technical scheme conceived by the utility model compared with prior art, owing to taking full advantage of the advantage of burner centre vortex structure trapped vortex combustion, can obtain following beneficial effect:
1, utilize multiple camber blades to enhance the mixing effect of air and fuel oil, improve efficiency of combustion;
2, the reasonable combination of body in whirlpool by cyclone and center, the shear action in the exit of annular channel by air-flow, strengthens atomization, utilizes eddy flow overheavy firing simultaneously, shortens the length of flame;
3, utilize the structure of center body in whirlpool to form cavity in whirlpool, winner's recirculating zone volume is increased, and speed reduces; Flame stabilization can be kept under the oil-gas ratio scope of broadness;
4, by combustion chamber flame drum contraction in length 10% ~ 20%, make chamber structure compacter;
5, arranging cooling-water duct prevents high temperature to the destruction of burner inner liner.
Accompanying drawing explanation
Fig. 1 is the structural representation of flameholder described in the utility model;
Fig. 2 is the structural representation of combustion chamber described in the utility model;
Fig. 3 is the utility model combustion chamber expansion segment structural representation;
Fig. 4 is the utility model combustion chamber flame drum structural representation.
In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein: expansion segment 21-conical section 22-steady section 30-burner inner liner 31-inner barrel 32-outer cylinder body 33-cooling-water duct 34-inlet opening, the back segment of body in whirlpool 12a-inner ring hub 12b-camber blades 12c-outer shroud hub 13-annular channel 20-combustion chamber, 11c-center, the stage casing of body in whirlpool, the leading portion of body in whirlpool 11b-center, the 12-of body in whirlpool outer shroud cyclone 11a-center, 10-flameholder 11-center 35-apopore 36-peep hole 37-inspection section 40-screw thread
Detailed description of the invention
The utility model provides a kind of flameholder, and comprise center body in whirlpool 11 and the outer shroud cyclone 12 of coaxial setting, it is characterized in that, described outer shroud cyclone 12 is annular, is made up of from the inside to the outside inner ring hub 12a, camber blades 12b and outer shroud hub 12c; Described multiple camber blades 12b is evenly connected between inner ring hub 12a and outer shroud hub 12c, and the entrance established angle of each camber blades is 40 ° ~ 60 °, camber blades for strengthening the mixing effect of air and fuel oil, enhanced burning efficiency; Described center body in whirlpool 11 is divided into leading portion 11a, stage casing 11b and back segment 11c in the axial direction, described back segment 11c is disc or cylinder, stage casing 11b and leading portion 11a is respectively cylinder, leading portion 11a is fixed in inner wheel hub 12a, with the inwall looping runner 13 of inner wheel hub 12a, for as the main combustion district under high operating mode, utilize eddy flow overheavy firing, improve efficiency of combustion, shorten the length of flame; Meanwhile, main fuel can be injected in inwall and the leading portion 11a outer wall of inner wheel hub 12a with the form of oil film, strengthens atomizing effect.
Preferably, described back segment 11c is disc, the diameter of described stage casing 11b is less than the diameter of leading portion 11a and back segment 11c, the cavity in whirlpool of leading portion 11a rear wall, stage casing 11b outer wall and the common looping of back segment 11c antetheca, for operationally reducing air velocity, cyclone is worked under higher speed of incoming flow, because the flame of cavity in whirlpool is not easily blown out, flame temperature is stablized, can as the primary combustion zone of burning under flame on duty and low operating mode.
Preferably, described multiple camber blades 12b is 10 ~ 16, and entrance established angle is 45 °.
According to another aspect of the present utility model, additionally provide a kind of combustion chamber comprising above-mentioned flameholder 10, it is characterized in that, comprise expansion segment 20 and the burner inner liner 30 of coaxial connection from front to back, the passage of described expansion segment 20 for providing air-flow to enter outer shroud cyclone 12, the front end that described flameholder 10 is positioned at described burner inner liner 30 is inner, and with the equal diameters of burner inner liner 30 front end.
Preferably, described expansion segment 20 is divided into conical section 21 and steady section 22 from front to back in the axial direction, and described conical section 21 is truncated cone-shaped, the angle of flare is 13 ° ~ 15 °, its top is docked with columnar steady section 22, and bottom, as the entrance of air-flow, is connected with the gas pipeline of ventilation blower.
Preferably, described burner inner liner 30 forms by inner barrel 31 and outer cylinder body 32 are coaxially nested, between inner barrel 31 and outer cylinder body 32, interlayer is cooling-water duct 33, the destruction of high temperature is prevented for reducing barrel temperature, the rear and front end of outer cylinder body 32 outer wall is respectively arranged with inlet opening 34 and apopore 35, and can front end be apopore 35, rear end be inlet opening 34, also can front end be inlet opening 34, rear end be apopore 35; Multiple inspection section 37 is communicated with outside and inner barrel 31 inner space of outer cylinder body 32, and the opening of inspection section 37 on outer cylinder body 32 forms peep hole 36, for carrying out monitoring and observation to the flame in combustion chamber 30.
Fig. 1 is a kind of according to flameholder 10 of the present utility model, comprises center body in whirlpool 11 and outer shroud cyclone 12.Outer shroud cyclone 12 is made up of outer shroud hub 12c, inner ring hub 12a and 12 bending tablet blade 12b.And camber blades 12b is evenly distributed between outer shroud hub 12c and inner ring hub 12a with the entrance established angle of 45 °, the passage between camber blades 12b strengthens the mixing effect of air and fuel oil, enhanced burning efficiency.
Outer wheel hub 12c diameter is 80mm, and thickness is 1mm, and inner wheel hub 12a diameter is 56mm, and thickness is 2mm, and camber blades 12b width is 40mm, and thickness is 1mm.
Center in Wo Tiyou, the center first paragraph of body in whirlpool 11a, the center second segment of body in whirlpool 11b, center body in whirlpool the 3rd section of 11c composition.The center first paragraph of body in whirlpool 11a rear surface, the center second segment of body in whirlpool 11b outside wall surface, center body in whirlpool the 3rd section of 11c front face form cavity in whirlpool jointly.Length and the diameter of first paragraph 11a are respectively 40mm and 44mm; Second segment 11b length and diameter are respectively 13mm and 12mm; 3rd section of 11c thickness and diameter are respectively 2mm and 32mm.Inner wheel hub 12a and center body in whirlpool first paragraph 11a outside wall surface forms runner 13, and runner 13 width is 4mm; Main fuel can be injected in inwall and center body in the whirlpool first paragraph 11a outside wall surface of inner ring hub 12a with the form of oil film, strengthen combustion oil atomization.
Fig. 2 is the combustion chamber comprising this flameholder 10, and as shown in the figure, it is inner that described flameholder 10 is positioned at combustion chamber flame drum 30 front end, and with the equal diameters of burner inner liner 30 front end.The rear end of combustion chamber expansion segment 20 is connected by M10 screw thread 12 with burner inner liner 30 front end, and front end is then connected with the gas pipeline of ventilation blower.
Combustion chamber expansion segment 20 is positioned at chamber front end, and being mainly blower fan air-flow out provides passage to enter outer shroud cyclone 12.Expansion segment 20 is divided into conical section 21 and steady section 22, and length is respectively 200mm and 50mm, and the point diameter of conical section 21 is 180mm, and the diameter of rear end and steady section 22 connecting place is 80mm, as shown in Figure 3.
Combustion chamber flame drum 30 is divided into inner barrel 31, outer cylinder body 32, and interlayer is between the two cooling-water duct 33, and the head of burner inner liner 30 and afterbody are respectively arranged with inlet opening 34 and apopore 35.The stack shell external diameter of inner barrel 31 and outer cylinder body 32 is respectively 166mm, 186mm, and cylindrical shell wall thickness is 3mm.Cooling-water duct 33 width is 7mm, and multiple inspection section 37 is communicated with outside and inner barrel 31 inner space of outer cylinder body 32, and the opening of inspection section 37 on outer cylinder body 32 forms peep hole 36.Inlet opening 34, apopore 35 and inspection section 37 diameter are 10mm, and inspection section 37 spacing is 50mm, as shown in Figure 2, Figure 4 shows.
When combustion chamber operational, the air-flow entered from expansion segment 20 is after flameholder 10, and air-flow is divided into two parts, and major part, through camber blades 12b, forms swirling eddy, forms vortex-like air-flow at least partially through annular channel 13.After fuel oil enters combustion chamber by annular channel 13, not only can improve combustion oil atomization at the position of cavity in whirlpool, simultaneously under the effect of swirling eddy and vortex-like air-flow, strengthen the mixing effect of combustion oil atomization and air and fuel oil.
Because the vortex structure in combustion chamber can reduce the impact of speed of incoming flow change, make igniting in burning require to reduce, be easy to igniting, and not easily extinguished after igniting.And by the reasonable combination of outer shroud cyclone 12 with center body in whirlpool 11, form stable recirculating zone, and change the adverse pressure gradient of main recirculating zone, rear end, winner's recirculating zone volume is increased, and speed reduces.
After lighting due to fuel oil and air mixing effect good, and fuel atomization effect is good, and causing in burning can Thorough combustion, and efficiency of combustion improves.Burning afterproduct pollutes little, and volumetric heat intensity is large.
The efficiency of combustion of the vortex structure of combustion chamber is high, and volumetric heat intensity is large, can reduce combustion chamber volume, compact conformation.In combustion chamber after fuel combustion, peep hole 36 can be observed aflame temperature, speed.Due to combustion chamber, operationally temperature is higher simultaneously, so pass into cooling water between inside and outside cylindrical shell, to combustion chamber cooling, improves service life.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a flameholder, comprise center body in whirlpool (11) and the outer shroud cyclone (12) of coaxial setting, it is characterized in that, described outer shroud cyclone (12) is annular, is made up of from the inside to the outside inner ring hub (12a), multiple camber blades (12b) and outer shroud hub (12c); Described multiple camber blades (12b) are evenly connected between inner ring hub (12a) and outer shroud hub (12c), and the entrance established angle of each camber blades is 40 ° ~ 60 °; Described center body in whirlpool is divided into leading portion (11a), stage casing (11b) and back segment (11c) in the axial direction, described back segment (11c) is disc or cylinder, stage casing (11b) and leading portion (11a) are respectively cylinder, described leading portion (11a) is fixed in inner wheel hub (12a), with the inwall looping runner (13) of inner wheel hub (12a).
2. flameholder as claimed in claim 1, it is characterized in that, described back segment (11c) is disc, the diameter in described stage casing (11b) is less than the diameter of leading portion (11a) and back segment (11c), the cavity in whirlpool of leading portion (11a) rear wall, stage casing (11b) outer wall and the common looping of back segment (11c) antetheca.
3. flameholder as claimed in claim 1, it is characterized in that, described multiple camber blades (12b) are 10 ~ 16, and entrance established angle is 45 °.
4. one kind comprises the combustion chamber of flameholder as claimed in claim 1, it is characterized in that, comprise expansion segment (20) and the burner inner liner (30) of coaxial connection from front to back, the front end that described flameholder (10) is positioned at described burner inner liner (30) is inner.
5. combustion chamber as claimed in claim 4, it is characterized in that, described expansion segment (20) is divided into conical section (21) and steady section (22) from front to back in the axial direction, described conical section (21) is truncated cone-shaped, steady section (22) is cylindrical shape, the angle of flare of described conical section is 13 ° ~ 15 °, and its top is docked with steady section (22).
6. combustion chamber as described in claim 4 or 5, it is characterized in that, described burner inner liner (30) nestedly to form by inner barrel (31) and outer cylinder body (32) are coaxial, interlayer between inner barrel (31) and outer cylinder body (32) is cooling-water duct (33), the rear and front end of outer cylinder body (32) outer wall is respectively arranged with inlet opening (34) and apopore (35), multiple inspection section (37) is communicated with outside and inner barrel (31) inner space of outer cylinder body (32), the opening of inspection section (37) on outer cylinder body (32) forms peep hole (36).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520589391.5U CN205065799U (en) | 2015-08-03 | 2015-08-03 | A flame holder for combustion chamber and combustion chamber thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520589391.5U CN205065799U (en) | 2015-08-03 | 2015-08-03 | A flame holder for combustion chamber and combustion chamber thereof |
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| CN205065799U true CN205065799U (en) | 2016-03-02 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016307A (en) * | 2016-05-30 | 2016-10-12 | 江苏沃尔特环保有限公司 | Internal combustion biogas incineration torch with stable flame |
| CN107091486A (en) * | 2017-04-10 | 2017-08-25 | 西北工业大学 | A kind of after-burner annular flame barrel structure with cyclone |
| CN109737456A (en) * | 2018-12-25 | 2019-05-10 | 北京动力机械研究所 | A kind of combustion chamber cylinder with circumferential rib |
| CN109737455A (en) * | 2018-12-25 | 2019-05-10 | 北京动力机械研究所 | A kind of heater combustion chamber cylinder of anti-unstability |
| CN110523962A (en) * | 2019-09-27 | 2019-12-03 | 安徽信息工程学院 | Spray furnace in casting ladle baking whirlpool |
| CN112253261A (en) * | 2020-09-11 | 2021-01-22 | 北京动力机械研究所 | Split type heat sink cylindrical rectifier for stable combustion of heater |
| CN112780411A (en) * | 2019-11-06 | 2021-05-11 | 中国航发商用航空发动机有限责任公司 | Gas turbine water vapor hybrid power system, water vapor generation assembly, aircraft and power supply method |
-
2015
- 2015-08-03 CN CN201520589391.5U patent/CN205065799U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016307A (en) * | 2016-05-30 | 2016-10-12 | 江苏沃尔特环保有限公司 | Internal combustion biogas incineration torch with stable flame |
| CN107091486A (en) * | 2017-04-10 | 2017-08-25 | 西北工业大学 | A kind of after-burner annular flame barrel structure with cyclone |
| CN107091486B (en) * | 2017-04-10 | 2019-08-13 | 西北工业大学 | A kind of after-burner annular flame barrel structure with cyclone |
| CN109737456A (en) * | 2018-12-25 | 2019-05-10 | 北京动力机械研究所 | A kind of combustion chamber cylinder with circumferential rib |
| CN109737455A (en) * | 2018-12-25 | 2019-05-10 | 北京动力机械研究所 | A kind of heater combustion chamber cylinder of anti-unstability |
| CN110523962A (en) * | 2019-09-27 | 2019-12-03 | 安徽信息工程学院 | Spray furnace in casting ladle baking whirlpool |
| CN112780411A (en) * | 2019-11-06 | 2021-05-11 | 中国航发商用航空发动机有限责任公司 | Gas turbine water vapor hybrid power system, water vapor generation assembly, aircraft and power supply method |
| CN112253261A (en) * | 2020-09-11 | 2021-01-22 | 北京动力机械研究所 | Split type heat sink cylindrical rectifier for stable combustion of heater |
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