CN117287719A - Oil gas distribution rule adjusting device matched with resident vortex concave cavity flow field - Google Patents
Oil gas distribution rule adjusting device matched with resident vortex concave cavity flow field Download PDFInfo
- Publication number
- CN117287719A CN117287719A CN202311273985.0A CN202311273985A CN117287719A CN 117287719 A CN117287719 A CN 117287719A CN 202311273985 A CN202311273985 A CN 202311273985A CN 117287719 A CN117287719 A CN 117287719A
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- Prior art keywords
- adjusting
- resident
- piston
- inlet
- oil
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Links
- 238000001704 evaporation Methods 0.000 claims abstract description 50
- 239000003381 stabilizer Substances 0.000 claims abstract description 47
- 230000008020 evaporation Effects 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 33
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 7
- 230000035515 penetration Effects 0.000 abstract description 3
- 239000000295 fuel oil Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 16
- 230000000087 stabilizing effect Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
- F23R3/18—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
The invention discloses an oil gas distribution rule adjusting device matched with a resident vortex concave cavity flow field, which is arranged below an evaporation tube inlet of a resident vortex concave cavity duty stabilizer and used for adjusting the opening of the evaporation tube air inlet, and comprises an adjusting plate, a piston, a reset spring and an adjusting oil tube. The adjusting oil pipe is connected with the bottom of the piston and is used for controlling the oil supply quantity inside the piston to adjust the up-and-down motion of the piston so as to adjust the sliding of the adjusting plate in the inlet of the evaporating pipe, thereby achieving the purpose of adjusting the opening of the air inlet of the evaporating pipe. According to the invention, the opening degree of the air inlet of the evaporation tube is adjusted, the air flow flowing into the evaporation tube is controlled, and the penetration depth of the oil-gas mixture in the evaporation tube from evaporating Kong Penru concave cavities is changed. Therefore, the concentration distribution of the fuel oil in the trapped vortex cavity is changed, the purpose of adjusting the oil gas distribution rule is achieved, the oil gas distribution is more matched with the flowing state in the trapped vortex cavity, and the flame stability performance requirements of the stress application or stamping combustion chamber under different working conditions are further met.
Description
Technical Field
The invention relates to the technical field of novel afterburner or ram combustor flame stabilizers, and aims to improve the flame stability performance of an afterburner or ram combustor resident vortex concave cavity on duty stabilizer, and the afterburner or ram combustor flame stabilizer is mainly used as an aeroengine afterburner or ram combustor on duty stabilizer and can also be used in other combustors such as an interstage combustor, a gas turbine combustor and the like.
Technical Field
The flame stabilizer for the afterburner or the ram combustor on duty comprises a blunt flame stabilizer represented by an evaporation tank flame stabilizer, a thin film evaporation flame stabilizer and the like, and a novel flame stabilizer represented by a resident vortex cavity flame stabilizer and the like. In the case of blunt flame holders, the flame holding principle is that a recirculation zone is formed downstream of the holder, in which the fuel and air are mixed to form an oil-gas mixture and ignited. The hot combustion products from the combustion are transported upstream by the recirculation zone to ignite the fresh mixture of gases, thereby achieving the purpose of maintaining flame holding.
Different from the flame stabilizing principle of the blunt body type stabilizer, the vortex-holding cavity flame stabilizer forms a stable main and auxiliary double-vortex structure inside the cavity through the air entraining of the outer duct. The fuel oil is sprayed into the evaporating pipe through the duty nozzle and is mixed with the air flow entering the evaporating pipe to form an oil-gas mixture. The mixture then flows from the evaporation holes into the cavity and is ignited. Inside the cavity, the main vortex plays a role in maintaining flame stability, and the auxiliary vortex plays a role in protecting the main vortex from the main flow. The flame stabilizing performance of the vortex-holding cavity flame stabilizer is stronger than that of a blunt flame stabilizer due to better oil-gas mixing effect and smaller influence of main flow.
Thanks to the excellent flame stabilizing performance, the resident vortex cavity flame stabilizer becomes a duty stabilizer scheme of a plurality of new generation of afterburner or ram combustors. However, as aircraft put forth performance demands for higher altitudes and wider speed ranges, the inlet conditions of the afterburner or ram combustion chamber become extremely severe. With the change of the flying height and the flying speed of the aircraft, the parameter ratio of the inner and outer culvert air flow of the boost or ram combustion chamber, such as the flow ratio, the pressure ratio, the temperature ratio and the like, can greatly change. This can result in a large change in the intake air volume of the resident cavitation chamber evaporator tube, thereby affecting the penetration depth of the oil-gas mixture within the resident cavitation chamber after exiting the evaporation orifice. Under different inlet working conditions, the fuel concentration distribution in the resident cavitation chamber can be changed and cannot be kept in the optimal concentration distribution range, so that the flame stabilizing performance of the resident cavitation chamber flame stabilizer is affected. This creates great difficulties in the design of the resident vortex cavity flame holder.
Therefore, improvement is very necessary for the future advanced stress application or the flame stabilizer on duty of the swirl concave cavity of the ram combustion chamber, so that the flame stabilizer can adjust the air inflow of the evaporating pipe under different internal and external parameter ratios, thereby maintaining better concave cavity fuel concentration distribution and meeting the flame stabilizing performance requirement of the combustion chamber.
Disclosure of Invention
The invention aims to solve the technical problem of providing an oil gas distribution rule adjusting device matched with a resident vortex concave cavity flow field aiming at design challenges related to the background technology.
The invention adopts the following technical scheme for solving the technical problems:
the oil gas distribution rule adjusting device matched with the resident vortex cavity flow field is arranged below an evaporation tube inlet of the resident vortex cavity on-duty stabilizer to adjust the opening of an evaporation tube air inlet, and the cross section of the evaporation tube inlet of the resident vortex cavity on-duty stabilizer is rectangular;
the adjusting device comprises an adjusting plate, a piston, a retaining plate, a return spring and an adjusting oil pipe;
the inlet of the evaporation tube of the resident vortex concave cavity duty stabilizer is provided with a first chute and a second chute which are matched with the adjusting plate at two sides of the inlet, and the lower end of the inlet is provided with a through groove for the adjusting plate to pass through;
the upper end of the adjusting plate extends into the inlet of the evaporating pipe from the through groove, and the two ends of the adjusting plate are respectively matched with the first sliding groove and the second sliding groove and can slide up and down in the inlet of the evaporating pipe; the adjusting plate is in airtight sliding connection with the inlet of the evaporating pipe at the through groove, and the height of the adjusting plate is larger than that of the evaporating pipe;
the piston cylinder of the piston is fixedly connected with the shell of the resident vortex concave cavity duty stabilizer, and the end part of the piston rod is vertically and fixedly connected with the lower end surface of the retaining plate; the upper end face of the abutting plate is vertically and fixedly connected with the lower end of the adjusting plate;
the reset spring is sleeved on a piston rod of the piston, one end of the reset spring is fixedly connected with a piston cylinder of the piston, and the other end of the reset spring is fixedly connected with the retaining plate; the reset spring is in a normal state when the regulating plate is at the lowest end, and is in a stretching state when the regulating plate moves upwards;
the adjusting oil pipe is fixedly connected with the bottom of the piston cylinder of the piston, and a communicating through hole is formed between the adjusting oil pipe and the bottom of the piston cylinder; and the two ends of the adjusting oil pipe are connected with an oil supply system of an engine where the standing vortex concave cavity duty stabilizer is located, and the oil supply system is used for adjusting the height of the adjusting plate by adjusting the oil pressure in a piston cylinder of the piston, so as to adjust the opening of the air inlet of the evaporating pipe.
As a further optimization scheme of the oil gas distribution rule adjusting device matched with the resident cavitation cavity flow field, the resident cavitation cavity stabilizer adopts a double-inlet resident cavitation cavity stabilizer or a single-inlet resident cavitation cavity stabilizer.
Compared with the prior art, the technical scheme provided by the invention has the following technical effects:
1. according to the invention, the air flow flowing into the evaporation tube is controlled, and the oil gas distribution rule in the resident vortex cavity on-duty stabilizer is adjusted, so that the oil gas distribution is more matched with the flowing state in the resident vortex cavity, and the optimal flame stability of the resident vortex cavity on-duty stabilizer is obtained.
2. The adjusting device is relatively simple, the up-and-down movement of the adjusting plate is controlled by controlling the oil quantity in the adjusting oil pipe, and the adjusting scheme is easy to realize in a stress application or punching combustion chamber.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
fig. 3 is a schematic structural diagram of the cooperation of the adjusting plate, the piston, the retaining plate, the return spring and the adjusting oil pipe in the invention.
In the figure, the stabilizer is on duty in a 1-resident vortex concave cavity, an air inlet of a 2-evaporating pipe, a 3-adjusting plate, a 4-return spring, a 5-piston, a 6-adjusting oil pipe and a 7-piston rod.
Description of the embodiments
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings:
this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1 and 2, the invention discloses an oil gas distribution rule adjusting device matched with a resident vortex cavity flow field, which is arranged below an evaporation tube inlet of a resident vortex cavity duty stabilizer to adjust the opening of an evaporation tube air inlet, wherein the cross section of the evaporation tube inlet of the resident vortex cavity duty stabilizer is rectangular;
the adjusting device comprises an adjusting plate, a piston, a retaining plate, a return spring and an adjusting oil pipe;
the inlet of the evaporation tube of the resident vortex concave cavity duty stabilizer is provided with a first chute and a second chute which are matched with the adjusting plate at two sides of the inlet, and the lower end of the inlet is provided with a through groove for the adjusting plate to pass through;
the upper end of the adjusting plate extends into the inlet of the evaporating pipe from the through groove, and the two ends of the adjusting plate are respectively matched with the first sliding groove and the second sliding groove and can slide up and down in the inlet of the evaporating pipe; the adjusting plate is in airtight sliding connection with the inlet of the evaporating pipe at the through groove, and the height of the adjusting plate is larger than that of the evaporating pipe;
as shown in fig. 3, a piston cylinder of the piston is fixedly connected with a shell of the resident vortex cavity duty stabilizer, and the end part of a piston rod is vertically and fixedly connected with the lower end surface of the retaining plate; the upper end face of the abutting plate is vertically and fixedly connected with the lower end of the adjusting plate;
the reset spring is sleeved on a piston rod of the piston, one end of the reset spring is fixedly connected with a piston cylinder of the piston, and the other end of the reset spring is fixedly connected with the retaining plate; the reset spring is in a normal state when the regulating plate is at the lowest end, and is in a stretching state when the regulating plate moves upwards;
the adjusting oil pipe is fixedly connected with the bottom of the piston cylinder of the piston, and a communicating through hole is formed between the adjusting oil pipe and the bottom of the piston cylinder; and the two ends of the adjusting oil pipe are connected with an oil supply system of an engine where the standing vortex concave cavity duty stabilizer is located, and the oil supply system is used for adjusting the height of the adjusting plate by adjusting the oil pressure in a piston cylinder of the piston, so as to adjust the opening of the air inlet of the evaporating pipe.
The resident vortex cavity stabilizer preferentially adopts a double-inlet resident vortex cavity stabilizer or a single-inlet resident vortex cavity stabilizer.
When the oil supply amount in the piston is increased, the piston drives the adjusting plate to move upwards, and the opening of the air inlet of the evaporating pipe is reduced; when the oil supply amount in the piston is reduced, the piston drives the adjusting plate to move downwards under the action of the return spring, and the opening of the air inlet of the evaporating pipe is increased; the air flow flowing into the evaporating pipe is controlled by adjusting the opening of the air inlet of the evaporating pipe, and the penetration depth of the oil-gas mixture in the evaporating pipe from the inside of the cavity of the evaporating Kong Penru is changed, so that the concentration distribution of fuel in the cavity of the trapped vortex is changed, the oil-gas distribution rule is adjusted, the oil-gas distribution is more matched with the flowing state in the cavity of the trapped vortex, and the flame stabilizing performance requirements of the afterburner or the stamping combustion chamber under different working conditions are further met.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (2)
1. The oil gas distribution rule adjusting device matched with the resident vortex cavity flow field is arranged below an evaporation tube inlet of the resident vortex cavity on-duty stabilizer to adjust the opening of an evaporation tube air inlet, and the cross section of the evaporation tube inlet of the resident vortex cavity on-duty stabilizer is rectangular;
the device is characterized by comprising an adjusting plate, a piston, a retaining plate, a return spring and an adjusting oil pipe;
the inlet of the evaporation tube of the resident vortex concave cavity duty stabilizer is provided with a first chute and a second chute which are matched with the adjusting plate at two sides of the inlet, and the lower end of the inlet is provided with a through groove for the adjusting plate to pass through;
the upper end of the adjusting plate extends into the inlet of the evaporating pipe from the through groove, and the two ends of the adjusting plate are respectively matched with the first sliding groove and the second sliding groove and can slide up and down in the inlet of the evaporating pipe; the adjusting plate is in airtight sliding connection with the inlet of the evaporating pipe at the through groove, and the height of the adjusting plate is larger than that of the evaporating pipe;
the piston cylinder of the piston is fixedly connected with the shell of the resident vortex concave cavity duty stabilizer, and the end part of the piston rod is vertically and fixedly connected with the lower end surface of the retaining plate; the upper end face of the abutting plate is vertically and fixedly connected with the lower end of the adjusting plate;
the reset spring is sleeved on a piston rod of the piston, one end of the reset spring is fixedly connected with a piston cylinder of the piston, and the other end of the reset spring is fixedly connected with the retaining plate; the reset spring is in a normal state when the regulating plate is at the lowest end, and is in a stretching state when the regulating plate moves upwards;
the adjusting oil pipe is fixedly connected with the bottom of the piston cylinder of the piston, and a communicating through hole is formed between the adjusting oil pipe and the bottom of the piston cylinder; and the two ends of the adjusting oil pipe are connected with an oil supply system of an engine where the standing vortex concave cavity duty stabilizer is located, and the oil supply system is used for adjusting the height of the adjusting plate by adjusting the oil pressure in a piston cylinder of the piston, so as to adjust the opening of the air inlet of the evaporating pipe.
2. The oil gas distribution law regulating device matched with a resident cavitation flow field according to claim 1, wherein the resident cavitation stabilizer adopts a double-inlet resident cavitation stabilizer or a single-inlet resident cavitation stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311273985.0A CN117287719A (en) | 2023-09-28 | 2023-09-28 | Oil gas distribution rule adjusting device matched with resident vortex concave cavity flow field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311273985.0A CN117287719A (en) | 2023-09-28 | 2023-09-28 | Oil gas distribution rule adjusting device matched with resident vortex concave cavity flow field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117287719A true CN117287719A (en) | 2023-12-26 |
Family
ID=89244069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311273985.0A Pending CN117287719A (en) | 2023-09-28 | 2023-09-28 | Oil gas distribution rule adjusting device matched with resident vortex concave cavity flow field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117287719A (en) |
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2023
- 2023-09-28 CN CN202311273985.0A patent/CN117287719A/en active Pending
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