阅读说明：本技术 钝体结构稳燃燃烧室 (Bluff body structure surely fires combustion chamber ) 是由 席中亚 黑少华 张飞豹 李明明 于 2019-09-19 设计创作，主要内容包括：本发明提供了一种钝体结构稳燃燃烧室,包括燃烧室室壁和钝体甩油盘,钝体甩油盘上设置有钝体结构,钝体结构沿远离甩油盘本体的方向呈外扩状；钝体结构与燃烧室室壁上的甩油盘挡环保持一定间隙,于间隙处形成进气通道。燃油在甩油盘集油腔内受离心作用而增压,并通过集油腔底部的燃油喷射孔喷入燃烧室内,完成雾化和与空气的掺混。空气通过上述进气通道进入燃烧室后在钝体甩油盘后形成回流区流场结构,回流区内部流速较低,且能够诱发高温燃气回流,因此能够显著提高甩油盘燃烧室头部火焰燃烧稳定性,有利于甩油盘燃烧室的地面和高空贫油熄火特性。并且,回流区的存在能够增加气流在燃烧室内的停留时间,因此有助于提高甩油盘燃烧室的燃烧效率。(The present invention provides a kind of bluff body structures surely to fire combustion chamber, including combustion chamber locular wall and bluff body disc, and bluff body structure is provided on bluff body disc, and bluff body structure is in outer expanding shape along the direction far from disc ontology；Disc baffle ring in bluff body structure and combustion chamber locular wall keeps certain interval, forms inlet channel in gap location.Fuel oil in disc collection chamber centrifugalization and be pressurized, and sprayed into combustion chamber by the fuel injection hole of collection chamber bottom, complete atomization and the blending with air.Air is entered by above-mentioned inlet channel forms recirculating zone flow field structure after bluff body disc behind combustion chamber, flow velocity is lower inside recirculating zone, and high-temperature fuel gas reflux can be induced, therefore disc head of combustion chamber flame combustion stability can be significantly improved, is conducive to ground and the high-altitude fuel-lean blowout characteristic of disc combustion chamber.Also, the presence of recirculating zone can increase the residence time of air-flow in the combustion chamber, therefore help to improve the efficiency of combustion of disc combustion chamber.)

1. a kind of bluff body structure surely fires combustion chamber, which is characterized in that including combustion chamber locular wall and bluff body disc, the bluff body is got rid of Food tray includes: disc ontology, bluff body structure, collection chamber and fuel hole, has first axle on the bluff body disc, described Bluff body structure is in outer expanding shape along the direction far from the first axle and far from the disc ontology；On the combustion chamber locular wall Equipped with disc installing zone and disc baffle ring, the bluff body disc is set to the disc installing zone, the combustion chamber Locular wall and bluff body disc surround to form combustion chamber, and the bluff body disc and the disc baffle ring form inlet channel, institute It states combustion chamber and the collection chamber is located at disc ontology two sides, and be connected to by the fuel hole.

2. bluff body structure according to claim 1 surely fires combustion chamber, which is characterized in that the bluff body structure formed it is described into The surface in gas channel is a part on cylindrical surface, circular conical surface or round table surface.

3. bluff body structure according to claim 1 surely fires combustion chamber, which is characterized in that the bluff body structure formed it is described into The surface in gas channel is smooth continuous curve surface.

4. bluff body structure according to claim 1 to 3 surely fires combustion chamber, which is characterized in that the disc ontology is different from institute The one side for stating bluff body structure is provided with bulge-structure, and venthole is provided on the bulge-structure, and the venthole runs through institute Disc ontology is stated, and is connected to the combustion chamber and collection chamber.

5. bluff body structure according to claim 4 surely fires combustion chamber, which is characterized in that the fuel oil hole number is at least two A, the fuel hole is arranged around the bulge-structure.

6. bluff body structure according to claim 4 surely fires combustion chamber, which is characterized in that the bulge-structure is by the oil-collecting Chamber is divided into two relatively independent cavitys, and multiple fuel holes are respectively arranged in each cavity, and multiple fuel holes are in a row Setting.

7. bluff body structure according to claim 4 surely fires combustion chamber, which is characterized in that the number of air hole is at least one It is a.

8. bluff body structure according to any one of claim 1-3 surely fires combustion chamber, which is characterized in that the fuel oil hole count Amount is at least two, and the fuel hole and the first axle are arranged in angle.

9. bluff body structure according to claim 1 surely fires combustion chamber, which is characterized in that the combustion chamber locular wall includes flame Cylinder antetheca and burner inner liner rear wall, the burner inner liner antetheca and/or burner inner liner rear wall are equipped at least one primary holes.

10. bluff body structure according to claim 9 surely fires combustion chamber, which is characterized in that the burner inner liner antetheca and/or fire Flame cylinder rear wall is equipped at least one blending hole.

Technical field

The present invention relates to engine chamber technical fields, surely fire combustion chamber more particularly to a kind of bluff body structure.

Background technique

Currently, low cost and high performance aeroengine combustor buring room technology should be become the spray of middle-size and small-size whirlpool, turbofan and whirlpool paddle One of developing direction and key technology of engine.In order to reduce middle-size and small-size engine chamber cost, on the one hand should protect Combustion chamber manufacturing cost itself is reduced on the basis of card chamber performance, on the other hand should also simplify engine fuel oil system as far as possible Complexity.Disc combustion chamber is a kind of design configuration that can meet above-mentioned requirements simultaneously, it can utilize shaft rotation pair Fuel oil is pressurized, to substantially reduce the requirement to fuel system；Meanwhile compared to Precision Machinings such as cyclone, swirl atomizers Part, the chamber structure is simple, can significantly reduce processing cost.Disc combustion chamber is widely used in U.S. Williams public affairs Department, Honeywell company, Teledyne company and Turbomeca company, France the spray of middle low thrust whirlpool, turbofan or whirlpool paddle start On machine product, such as FJ44 series fanjet, J402 series turbojet engine.

US5323602 patent describes a kind of disc combustion chamber, and the disc of the combustion chamber is mounted on engine spindle On, and rotated with main shaft.Fuel pipe is fed fuel oil in oil collecting ring by the space between centrifugal impeller and burner inner liner, and It is radially ejected by the aperture on oil collecting ring, is captured by the conduit on the inside of disc.Fuel oil conduit on the inside of disc It is interior to spray into combustion chamber since high speed rotation centrifugal action is supercharged to elevated pressures, and by the aperture of disc channel floor, It completes to be atomized and blended with air.US7036321 is by fuel oil oil collecting ring spray-hole direction by radially changing into axial direction； US7942006 is then protected mainly for the cooling of disc flame combustion chamber tube wall surface effusion wall；US4232526 is directed to and gets rid of Fuel injection hole is improved on food tray, so as to improve the distribution character of fuel oil in the combustion chamber, realizes the high-strength of combustion chamber Degree burning；Fuel injection hole on disc is designed as two rows by CN108150292A patent, and two rounds have certain angle, To realize wider atomization cone angle in the combustion chamber；CN108151066A patent on disc by installing swirl atomizer group Part enables disc to obtain the atomization characteristics of similar swirl atomizer.

As seen from the above analysis, the improvement for disc combustion chamber is mainly focused on disc atomizing type Improve, for flow organization in combustion chamber and its with fuel spray cone matching in terms of improve it is less, cause the oil-poor of combustion chamber to be put out Fiery characteristic is bad and efficiency of combustion is lower, and be still greatly improved space.

Summary of the invention

Based on this, it is necessary to for fuel-lean blowout characteristic present in current engine chamber is bad and efficiency of combustion Lower problem provides a kind of bluff body structure and surely fires combustion chamber.

Above-mentioned purpose is achieved through the following technical solutions:

A kind of bluff body structure surely fires combustion chamber, including combustion chamber locular wall and bluff body disc, and the bluff body disc includes: Disc ontology, bluff body structure, collection chamber and fuel hole, the bluff body disc have first axle, bluff body structure edge Direction far from the first axle and far from the disc ontology is in outer expanding shape；The combustion chamber locular wall is equipped with disc Installing zone and disc baffle ring, the bluff body disc are set to the disc installing zone, the combustion chamber locular wall and bluff body Disc surrounds to form combustion chamber, and the bluff body disc and the disc baffle ring form inlet channel, the combustion chamber with The collection chamber is located at disc ontology two sides, and is connected to by the fuel hole.

It is cylindrical surface, circular conical surface that the bluff body structure, which forms the surface of the inlet channel, in one of the embodiments, Or a part of round table surface.

It is smooth continuous curve surface that the bluff body structure, which forms the surface of the inlet channel, in one of the embodiments,.

The disc ontology is provided with raised knot different from the one side of the bluff body structure in one of the embodiments, Structure is provided with venthole on the bulge-structure, and the venthole runs through the disc ontology, and be connected to the combustion chamber and Collection chamber.

The fuel oil hole number is at least two in one of the embodiments, and the fuel hole is around the protrusion knot Structure setting.

The collection chamber is divided into two relatively independent cavitys by the bulge-structure in one of the embodiments, Multiple fuel holes are respectively arranged in each cavity, multiple fuel holes are set in a row.

The number of air hole is at least one in one of the embodiments,.

The fuel oil hole number is at least two in one of the embodiments, the fuel hole and the first axle It is arranged in angle.

The combustion chamber locular wall includes burner inner liner antetheca and burner inner liner rear wall, the flame in one of the embodiments, Cylinder antetheca and/or burner inner liner rear wall are equipped at least one primary holes.

The burner inner liner antetheca and/or burner inner liner rear wall are equipped at least one blending hole in one of the embodiments,.

The beneficial effects of the present invention are:

The present invention provides a kind of bluff body structures surely to fire combustion chamber comprising combustion chamber locular wall and bluff body disc, bluff body Bluff body structure is provided on disc, bluff body structure is in outer expanding shape along the direction far from disc ontology；Bluff body structure and burning Disc baffle ring on the locular wall of room keeps certain interval, forms inlet channel in gap location.Fuel oil in disc collection chamber by Centrifugal action and be pressurized, and sprayed into combustion chamber by the fuel injection hole of collection chamber bottom, complete atomization and mixed with air It is mixed.Air is entered by above-mentioned inlet channel forms recirculating zone flow field structure after bluff body disc behind combustion chamber, in recirculating zone Portion's flow velocity is lower, and can induce high-temperature fuel gas reflux, therefore it is steady to significantly improve disc head of combustion chamber flame combustion It is qualitative, be conducive to ground and the high-altitude fuel-lean blowout characteristic of disc combustion chamber.Also, the presence of recirculating zone can increase air-flow Residence time in the combustion chamber, therefore help to improve the efficiency of combustion of disc combustion chamber.

Detailed description of the invention

Fig. 1 is the structural schematic diagram that bluff body structure provided by one embodiment of the invention surely fires combustion chamber, part arrow in figure Head index wire represents the flow direction of oil gas；

Partial enlarged view in Fig. 2 Fig. 1 at bluff body disc；

Fig. 3 is the structural schematic diagram of bluff body disc provided by the embodiment of the present invention one；

Fig. 4 is the structural schematic diagram of bluff body disc provided by the embodiment of the present invention two.

Wherein:

Bluff body disc 100；Disc ontology 110；Bluff body structure 120；Collection chamber 130；Fuel hole 140；Bulge-structure 150；Venthole 151；Combustion chamber locular wall 200；Baffle ring 211 before disc；Baffle ring 212 after disc；Primary holes 220；Blending hole 230；Oil feed line 300；Oil collecting ring 400；Through-hole 410；Igniter 500；Guide vane 600；Inlet channel 700.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached Figure, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this hair It is bright, it is not intended to limit the present invention.

It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object, Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and It is indirectly connected with (connection).In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", " left side ", The orientation of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " or position are closed System is merely for convenience of description of the present invention and simplification of the description to be based on the orientation or positional relationship shown in the drawings, rather than indicates Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand For limitation of the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

The present invention provides a kind of bluff body structures surely to fire combustion chamber, as shown in Figure 1, Figure 2 and Figure 3 comprising combustion chamber room Wall 200 and bluff body disc 100, bluff body disc 100 include: disc ontology 110, bluff body structure 120,130 and of collection chamber Fuel hole 140 has first axle 900 on bluff body disc 100, and first axle 900 is vertical with engine spindle axis, and position The center of the side of bluff body structure 120 is equipped in bluff body disc 100, and bluff body structure 120 is far from first axle 900 and remote Direction from disc ontology 110 is in outer expanding shape；Combustion chamber locular wall 200 is equipped with disc installing zone and disc baffle ring, combustion It burns room locular wall 200 and the encirclement of bluff body disc 100 forms combustion chamber, bluff body disc 100 is set to disc installing zone, burning Room and collection chamber 130 are located at 110 two sides of disc ontology, and are connected to by fuel hole 140；And bluff body disc after mounting There are a fixed gap, bluff body disc 100 and disc baffle rings between 100 and combustion chamber locular wall 200 forms air inlet in gap Channel 700.Bluff body disc 100 is mounted in the power sources live spindle such as engine, and rotates together with main shaft, therefore fuel oil The centrifugalization in disc collection chamber 130 and be pressurized, and combustion chamber is sprayed by the fuel injection hole of 130 bottom of collection chamber It is interior, complete atomization and the blending with air.The inlet channel that air is formed by bluff body disc 100 and combustion chamber locular wall 200 700 flowing in combustion chamber.100 top of bluff body disc is bluff body structure 120, and air enters burning by above-mentioned inlet channel 700 Recirculating zone flow field structure is formed behind room after bluff body disc 100, flow velocity is lower inside recirculating zone, and can induce high-temperature fuel gas Reflux, therefore disc head of combustion chamber flame combustion stability can be significantly improved, be conducive to the bottom surface of disc combustion chamber With high-altitude fuel-lean blowout characteristic.Also, the presence of recirculating zone can increase the residence time of air-flow in the combustion chamber, therefore help In the efficiency of combustion for improving disc combustion chamber.

Bluff body structure 120 includes the inner surface close to fuel hole 140 and the outer surface close to combustion chamber locular wall 200, bluff body 120 outer surface of structure is used to form inlet channel 700, and shape directly affects the formation of recirculating zone；And the shape of inner surface As long as not influencing the normal ejection of fuel in fuel hole 140.Wherein in some embodiments, 120 appearance of bluff body structure Face surface can be the common ruled surface such as cylindrical surface, circular conical surface, round table surface, be also possible to other smooth continuous curve surfaces, or A part in above-mentioned curved surface, also or the combination of above-mentioned a variety of curved surfaces or part curved surface.For example, outer surface can be considered one Small Taper round table surface, inner surface can be considered a steep-taper round table surface, 110 junction of outer surface, inner surface and disc ontology Certain distance is kept, and due to the difference of taper, outer surface, inner surface intersect in one end far from disc ontology 110.

Wherein in some embodiments, as shown in figure 4, in order to reinforce the blending of recirculating zone fuel and combustion-supporting gas effect Fruit is provided with bulge-structure 150 in 110 collection chamber 130 of disc ontology, venthole 151 is provided in bulge-structure 150, Venthole 151 runs through disc ontology 110, so that collection chamber 130 is connected to recirculating zone.Venthole 151 can introduce air into Flow back district center, on the one hand can improve the atomization characteristics under the Smaller load of combustion chamber, is conducive to the igniting of combustion chamber and the spy that stops working Property；On the other hand it can reinforce oil gas blending, improve the efficiency of combustion under high load capacity.Oil is got rid of since bulge-structure 150 protrudes from Disk ontology 110, fuel preferentially enter in the fuel hole 140 of 130 bottom of collection chamber under the centrifugal action of disc, and It will not enter in the venthole 151 being located on bulge-structure 150, lead to the blocking of venthole 151.

Further, collection chamber 130 is divided into multiple relatively independent cavitys, each cavity bottom by bulge-structure 150 It is provided with fuel hole 140.As shown in figure 3, fuel chamber is divided into two relatively independent cavitys by bulge-structure 150, each Cavity bottom is at least provided with a fuel hole 140.

In some other embodiment, as shown in Figure 3 and Figure 4, in order to improve recirculating zone or fuel in combustion chamber and sky Multiple fuel holes 140 are arranged in the mixing effect of gas on disc ontology 110.Obviously, 140 quantity of fuel hole is more, fuel by The path that collection chamber 130 enters recirculating zone or combustion chamber is more, and fuel dispersion effect is better, can be improved mixing for fuel and air Mixed effect.Specifically, fuel hole 140 can be by around first axle 900 according to circumference array in a manner of arrange, can also collect 130 bottom of oil pocket is arranged in a manner of rectangular array, can also be with other rules or irregular mode arrangement.It should be noted that When 140 quantity of fuel hole is excessive, may intensity to disc ontology 110 and dynamic balance property impact, blend simultaneously The promotion amplitude of effect can be also gradually reduced with the increase of 140 quantity of fuel hole；It therefore, should when fuel hole 140 designs Suitable quantity is selected, and should be symmetrical arranged as far as possible around first axle 900.

For being provided with the bluff body disc 100 of bulge-structure 150, since collection chamber 130 is divided by bulge-structure 150 Multiple relatively independent cavitys should be arranged at least one in order to avoid fuel is accumulated in some independent cavity in each cavity A fuel hole 140.

Further, as shown in figure 3, in order to further increase the blending of recirculating zone or fuel in combustion chamber and air effect Fruit, fuel hole 140 are arranged with first axle 900 at angle.It is arranged in parallel compared to 140 axis of fuel hole with first axle 900 Mode, at the fuel hole 140 that angle is arranged, when one side fuel hole 140 enters combustion chamber or recirculating zone, fuel outlet and the The distance of one axis 900 is bigger；After another aspect fuel enters combustion chamber or recirculating zone out of fuel hole 140, at a certain angle It sprays into.With the case where multiple fuel hole 140 for example, when fuel hole 140 and 130 junction of collection chamber it is constant when, set in parallel When setting, the motion path of fuel is on a cylindrical surface；When being arranged in angle, the motion path of fuel is in a circle On the conical surface；Obviously, the motion range of fuel is bigger when being arranged at angle, also more preferable with the mixing effect of air.

Wherein in some embodiments, as shown in Figure 1, after combustion chamber locular wall 200 is including burner inner liner antetheca and burner inner liner Primary holes 220 is provided on wall, burner inner liner antetheca and burner inner liner rear wall, primary holes 220 is used for after bluff body disc 100 Portion blends further dilution air in the combustion gas of after-combustion, to reach better combustion efficiency.

Further, be additionally provided with blending hole 230 on burner inner liner antetheca and burner inner liner rear wall, blending hole 230 compared to Primary holes 220, farther away from bluff body disc 100, blending hole 230 is used to blend sky again to by the combustion gas of primary holes 220 Gas, and further flow towards combustor exit.

Wherein in some embodiments, the bluff body structure in bluff body disc, which can be, increases material processing side by casting etc. Formula, with integral structure made of disc ontology；The separately made part of bluff body structure can also be passed through into welding, bolt Connection etc. is fixedly connected with mode and is connected as one with disc ontology；Also or by the separately made part of bluff body structure, lead to It crosses other mounting means and is fixedly connected with it with live spindle, and rotated with disc ontology with same rotational speed.

Wherein in some embodiments, primary holes diameter is 8mm-20mm.

Wherein in some embodiments, blending pore diameter size is 8mm-20mm.

Wherein in some embodiments, it is used to form between bluff body disc and disc baffle ring between inlet channel 700 Gap is 1mm-5mm.

Wherein in some embodiments, the aperture of fuel hole is 0.2mm-1mm, and quantity is 8-20.

Wherein in some embodiments, fuel oil centerline hole and first axle corner dimension are 0-60 °.

Wherein in some embodiments, venthole aperture is 1.5mm-4mm, and quantity is 8-20.

Compared with prior art, bluff body structure provided by the present invention surely fires combustion chamber and at least has following advantages:

(1) bluff body structure provided by the invention patent surely fires combustion chamber, and bluff body disc top has bluff body structure, Symmetrical recirculating zone can be formed in head of combustion chamber, provide the steady combustion environment of low speed, rich oil for flame, combustion chamber can be significantly improved Fuel-lean blowout characteristic and efficiency of combustion.

(2) bluff body structure provided by the invention patent surely fires combustion chamber, and bluff body disc collection chamber can be divided into Fuel oil is sprayed into combustion chamber by two rows of fuel injection holes by two independent collection chambers, fuel oil, and bluff body disc center can be with Airport is set, the oil gas blending characteristic of head of combustion chamber can be effectively improved, and then improves combustion efficiency of combustion chamber, reduce dirt Contaminate object emission level.

(3) bluff body structure provided by the invention patent surely fires combustion chamber, is significantly improving the same of combustion chambers burn performance When, do not increase the manufacturing cost of combustion chamber, therefore can be applied to low cost, high-performance aeroengine design.