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CN-121993816-A - Rotary knocking combustion chamber

CN121993816ACN 121993816 ACN121993816 ACN 121993816ACN-121993816-A

Abstract

The application discloses a rotary detonation combustion chamber which comprises a gas supply oil supply assembly, an injection assembly and a combustion chamber body, wherein the combustion chamber body is provided with an annular channel, the gas supply oil supply assembly is communicated with a gas supply system and can form high-speed gas flow to enter the annular channel, and the gas supply oil supply assembly is communicated with an energy supply system and the injection assembly, so that fuel can enter the injection assembly through the gas supply oil supply assembly, primary atomization is carried out in the injection assembly and fuel jet flow is formed into the annular channel, the high-speed gas flow and the fuel jet flow can collide in the annular channel to carry out secondary atomization to form a combustible mixture, the combustion chamber body is provided with an igniter for detonating the combustible mixture to form rotary detonation waves, the gas flow is expanded and accelerated at the downstream of the detonation waves through the combustion mode of rotary detonation, and is discharged from the tail part of the combustion chamber in the form of high-temperature gas, the self-pressurization characteristic of the rotary detonation combustion chamber can improve the thermal efficiency of combustion, reduce the emission of pollutants such as NOx and the like, and the rotary detonation combustion chamber has a more compact structure.

Inventors

  • WANG BING
  • QIN WENKAI
  • WEN HAOCHENG

Assignees

  • 清华大学

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. The rotary detonation combustor is characterized by comprising a gas supply and oil supply assembly (100), an injection assembly (200) and a combustor body; wherein the combustion chamber body is formed with an annular channel (330), and the air supply and oil supply assembly (100) is communicated with an air supply system and can form high-speed air flow into the annular channel (330); The air supply and oil supply assembly (100) is communicated with the energy supply system and the injection assembly (200), fuel can enter the injection assembly (200) through the air supply and oil supply assembly (100), and the fuel can be atomized for the first time in the injection assembly (200) and forms fuel jet flow to enter the annular channel (330); The high velocity gas stream is capable of impinging with the fuel jet in the annular passage (330) for secondary atomization to form a combustible mixture, and the combustion chamber body is configured with an igniter for detonating the combustible mixture to form a rotary detonation wave.
  2. 2. The rotary detonation combustor of claim 1, wherein the air and fuel supply assembly (100) includes a fuel panel (110), a fuel cover plate (120), an air panel (130), and a connection panel (140); Wherein the fuel panel (110) is connected with the fuel cover plate (120) to form a liquid collecting cavity (150), the upstream of the fuel panel (110) is connected with the connecting panel (140), and the connecting panel (140) is used for connecting with the air supply system; -connecting the air panel (130) downstream of the fuel panel (110), mounting the injection assembly (200) on the fuel panel (110), the injection assembly (200) extending to the air panel (130) and forming an annular gap with the air panel (130); The gas provided by the gas supply system is ejected from the annular gap between the injection assembly (200) and the air panel (130) at a high speed after entering the fuel panel (110) from the connection panel (140) to form the high-speed gas flow.
  3. 3. The rotary detonation combustor of claim 2, wherein a circumferential side wall of the fuel panel (110) is provided with a connection hole (111), the connection hole (111) being for connecting the energy supply system with the liquid collection cavity (150); The injection assembly (200) comprises fuel channels (210) and an injection body (220) which are distributed in sequence along the flow direction, wherein the fuel channels (210) are communicated with the liquid collecting cavity (150); After the fuel provided by the energy supply system enters the liquid collecting cavity (150) from the connecting hole (111), the fuel enters the injection body (220) through the fuel channel (210) for primary atomization and forms the fuel jet.
  4. 4. The rotary detonation combustor of claim 3, wherein the injector body (220) comprises: a housing (221), wherein the housing (221) is of a hollow structure, a first end of the housing (221) is connected with the fuel channel (210), and a second end of the housing (221) forms a nozzle (222); The cyclone (223), the cyclone (223) is installed in the second end of the shell (221), an atomization cavity (224) is formed at one end, close to the nozzle (222), of the cyclone (223), the atomization cavity (224) is communicated with the nozzle (222), and a through hole (2231) is formed in the side wall of the cyclone (223); The filter element (225) is arranged at one end, far away from the nozzle (222), of the cyclone (223), the filter element (225) is of an annular sheet structure, a gap is formed between the filter element (225) and the inner wall of the shell (221), and the filter element (225) is provided with a filter hole; The fuel enters the shell (221) from the fuel channel (210), is filtered by the filter element (225), enters the atomization cavity (224) from a gap between the filter element (225) and the inner wall of the shell (221) through the through hole (2231), is primarily atomized in the atomization cavity (224), and is sprayed out through the nozzle (222) to form the fuel jet.
  5. 5. The rotary detonation combustor of claim 4, wherein an axis of the through bore (2231) is angled from a radial direction of the swirler (223) such that a tangential velocity is obtained during fuel entering the atomizing chamber (224) through the through bore (2231).
  6. 6. The rotary detonation combustor of claim 5, wherein the number of through holes (2231) is at least three, and at least three of the through holes (2231) are sequentially equally divided along the circumference of the swirler (223) such that fuel forms at least three high-speed swirls to collide in the atomizing chamber (224) to form primary atomization.
  7. 7. The rotary detonation combustor of claim 4, wherein the nozzle (222) forms a convergent-divergent structure in a fuel flow direction.
  8. 8. The rotary detonation combustor of claim 4, further comprising a spring (226), the spring (226) disposed on an inner wall of the filter element (225), the spring (226) connected to an end of the swirler (223) remote from the nozzle (222) for axially spacing the swirler (223).
  9. 9. The rotary detonation combustor of claim 1, wherein the combustor body includes an inner wall surface (310) and an outer wall surface (320), the annular channel (330) being formed between the inner wall surface (310) and the outer wall surface (320); The igniter is disposed on the outer wall surface (320).
  10. 10. The rotary detonation combustor of any one of claims 1-9, wherein there are a plurality of the injection assemblies (200), a plurality of the injection assemblies (200) are sequentially equally spaced apart along a circumference of the air and oil supply assembly (100), and all of the injection assemblies (200) correspond to the annular channel (330).

Description

Rotary knocking combustion chamber Technical Field The application relates to the technical field of combustion chambers, in particular to a rotary detonation combustion chamber. Background The combustion chamber can generate high-temperature gas, form thrust or provide thermal power, and has wide application in the fields of metallurgy, automobiles, chemical industry, aerospace and the like, however, the traditional combustion chamber is used for organizing combustion by an isobaric principle, and the traditional combustion chamber has the defects of complex equipment structure, large volume, low thermal efficiency, large pollution of NOx and the like. In summary, how to improve the thermal efficiency of the combustion chamber and reduce the emission of pollutants is a problem to be solved by those skilled in the art. Disclosure of Invention In view of the above, the present application aims to provide a rotary detonation combustor, which improves the thermal efficiency of the combustor and reduces pollutant emissions. In order to achieve the above purpose, the present application provides the following technical solutions: A rotary detonation combustor comprises a gas supply and oil supply assembly, an injection assembly and a combustor body. The combustion chamber comprises a combustion chamber body, an air supply and oil supply assembly, an energy supply system, an injection assembly, a fuel injection assembly and an igniter, wherein the combustion chamber body is provided with an annular channel, the air supply and oil supply assembly is communicated with the air supply system and can form high-speed air flow to enter the annular channel, the air supply and oil supply assembly is communicated with the energy supply system and the injection assembly, fuel can enter the injection assembly through the air supply and oil supply assembly, the fuel can be atomized for the first time in the injection assembly and form fuel jet flow to enter the annular channel, the high-speed air flow and the fuel jet flow can collide in the annular channel to be atomized for the second time to form a combustible mixture, and the combustion chamber body is provided with the igniter for detonating the combustible mixture to form a rotary detonation wave. In some embodiments, the air supply and oil supply assembly comprises a fuel panel, a fuel cover plate, an air panel and a connecting panel, wherein the fuel panel is connected with the fuel cover plate to form a liquid collecting cavity, the upstream of the fuel panel is connected with the connecting panel, the connecting panel is used for being connected with the air supply system, the downstream of the fuel panel is connected with the air panel, the injection assembly is arranged on the fuel panel, the injection assembly extends to the air panel and forms an annular gap with the air panel, and gas provided by the air supply system is sprayed out at a high speed from the annular gap between the injection assembly and the air panel after entering the fuel panel from the connecting panel, so that the high-speed airflow is formed. In some embodiments, a connecting hole is formed in a circumferential side wall of the fuel panel, the connecting hole is used for connecting the energy supply system and the liquid collecting cavity, the injection assembly comprises a fuel channel and an injection body which are distributed in sequence along a flow direction, the fuel channel is communicated with the liquid collecting cavity, and fuel provided by the energy supply system enters the liquid collecting cavity from the connecting hole, enters the injection body through the fuel channel for primary atomization and forms the fuel jet. In some embodiments, the injection body comprises a shell, a swirler, a filter element and a filter element, wherein the shell is of a hollow structure, a first end of the shell is connected with the fuel channel, a nozzle is formed at a second end of the shell, the swirler is installed inside the second end of the shell, an atomization cavity is formed at one end of the swirler, which is close to the nozzle, the atomization cavity is communicated with the nozzle, a through hole is formed in the side wall of the swirler, the filter element is installed at one end, far away from the nozzle, of the swirler, the filter element is of an annular sheet structure, a gap is formed between the filter element and the inner wall of the shell, a filter hole is formed in the filter element, fuel enters the shell from the fuel channel, is filtered by the filter element, enters the atomization cavity from the gap between the filter element and the inner wall of the shell through the through hole, is atomized for the first time in the atomization cavity, and is sprayed out through the nozzle to form the fuel jet. In some embodiments, the axis of the through hole is at an angle to the radial direction of the swirler such that tangential velocity is obtained during the passage