Search

CN-118168025-B - Centrifugal atomizing nozzle with front cyclone

CN118168025BCN 118168025 BCN118168025 BCN 118168025BCN-118168025-B

Abstract

The invention relates to the technical field of engines, and provides a centrifugal atomizing nozzle with a front cyclone. The centrifugal atomizing nozzle with the front cyclone comprises a heat shield, a nozzle body and a vortex assembly. The heat-insulating cover is internally provided with a cavity, the side wall of the heat-insulating cover is provided with a first through hole and a second through hole, the first through hole, the second through hole and the cavity are communicated to form a channel, the nozzle body is arranged in the cavity, the outlet end of the nozzle body is communicated with the outside through the second through hole, and the vortex assembly is arranged in the channel and positioned between the first through hole and the second through hole and is used for forming gas turbulence and gas vortex. The centrifugal atomizing nozzle solves the defect that the atomizing effect of the atomizing nozzle on fuel oil in the prior art is limited, realizes the centrifugal atomizing nozzle with the front-arranged vortex device assembly, generates the spiral air flow after the air flow passes through the vortex device assembly, atomizes the fuel oil, and improves the atomizing performance, the ignition performance and the flame stability of the combustion chamber of the aero-engine.

Inventors

  • LIN YUZHEN
  • ZHAO HONGHUA
  • DUAN WEI
  • WANG YUZHUO
  • WANG JIANCHEN

Assignees

  • 北京航空航天大学

Dates

Publication Date
20260508
Application Date
20240320

Claims (9)

  1. 1. A swirl-tipped centrifugal atomizing nozzle, comprising: the heat insulation cover (100) is internally provided with a cavity, the side wall of the heat insulation cover (100) is provided with a first through hole (111) and a second through hole (112), and the first through hole (111), the second through hole (112) and the cavity are communicated; the nozzle body (200) is partially arranged in the cavity, and the outlet end of the nozzle body (200) is communicated with the outside through the second through hole (112); a vortex assembly (300) disposed inside the cavity and between the first through hole (111) and the second through hole (112) for forming a gas turbulence and a gas vortex; The vortex assembly (300) comprises: The first vortex device (310) is arranged between the outer wall of the nozzle body (200) and the inner wall of the cavity, the first vortex device (310) is provided with a plurality of first vortex holes (311), and the plurality of first vortex holes (311) are arranged at circular intervals; The second vortex device (320) is arranged between the nozzle body (200) and the inner wall of the cavity and is arranged at an upper-lower interval with the first vortex device (310), the second vortex device (320) is provided with a plurality of second vortex holes (321), and the second vortex holes (321) are arranged at a circular interval; the rotation direction of the first vortex hole (311) is opposite to the rotation direction of the second vortex hole (321).
  2. 2. The swirl-prepositive centrifugal atomizing nozzle according to claim 1, wherein the first swirler (310) further comprises a first swirl plate body (313), the first swirl holes (311) are formed in the first swirl plate body (313), two first swirl plate bodies (313) are arranged, two first swirl plate bodies (313) are enclosed on the periphery of the nozzle body (200), and the peripheries of the two first swirl plate bodies (313) are connected with the inner wall of the cavity.
  3. 3. The centrifugal atomizing nozzle with the front swirling flow according to claim 1, wherein the second swirler (320) further comprises a second swirling flow plate body (323), the second swirling flow holes (321) are formed in the second swirling flow plate body (323), two second swirling flow plate bodies (323) are arranged, two second swirling flow plate bodies (323) are surrounded on the outer periphery of the nozzle body (200), and the outer periphery of the two second swirling flow plate bodies (323) are connected with the inner wall of the cavity.
  4. 4. The swirl-advanced centrifugal atomizing nozzle according to claim 1, characterized in that the nozzle body (200) comprises a first conduit (220), the first conduit (220) extending through a nozzle body connection (210) and partly into the cavity interior; The nozzle body connecting part (210) is provided with a limiting part (211), and the nozzle body connecting part (210) is in sealing connection with the heat shield (100) through the limiting part (211); The first conduit (220) is internally provided with a first flow channel (221), and the first vortex device (310) and the second vortex device (320) are both positioned between the outer wall of the first conduit (220) and the inner wall of the cavity.
  5. 5. The swirl-prepositive centrifugal atomizing nozzle according to claim 4, wherein a second conduit (240) is provided at one end of the first conduit (220) outside the chamber, a second flow channel (241) is provided inside the second conduit (240), and the second flow channel (241) is in communication with the first flow channel (221).
  6. 6. The swirl-advanced centrifugal atomizing nozzle according to claim 4, characterized in that the first conduit (220) is provided with a swirler (230) at one end inside the cavity, the outlet of the swirler (230) being located in the second through hole (112).
  7. 7. The centrifugal atomizing nozzle with the front swirling flow according to claim 4, wherein a first limit groove (222) and a second limit groove (223) are provided on the outer wall of the first conduit (220) at an upper-lower interval, and the first swirler (310) and the second swirler (320) are located in the first limit groove (222) and the second limit groove (223) in a one-to-one correspondence.
  8. 8. The swirl-prepositive centrifugal atomizing nozzle according to claim 4, wherein the heat shield (100) comprises a heat shield body (110), a heat shield connecting part (120) is arranged at the top end of the heat shield body (110), the heat shield connecting part (120) is connected with the nozzle body connecting part (210), the cavity is positioned inside the heat shield body (110), the first through hole (111) is positioned at the middle upper part of the outer side of the heat shield body (110), and the second through hole (112) is positioned at the bottom of the outer side of the heat shield body (110).
  9. 9. The centrifugal atomizing nozzle with the front cyclone according to claim 8, wherein an opening (121) is arranged in the middle of the heat shield connecting portion (120), and the limiting portion (211) is in sealing connection with the opening (121).

Description

Centrifugal atomizing nozzle with front cyclone Technical Field The invention relates to the technical field of engines, in particular to a centrifugal atomizing nozzle with a front cyclone. Background Combustion chamber ignition and stable combustion are one of key steps of operation of the aero-engine, reliability and safety of the aero-engine are directly influenced, and ignition success and flame stabilization are one of the most basic technical requirements of all aero-engines and the most important technical requirements. The factors influencing the ignition and flame stabilization of the combustion chamber are many, and mainly comprise the inlet temperature, pressure, air flow, ignition energy and the like of the combustion chamber from the viewpoint of state parameters, and mainly comprise the fuel atomization quality, flow field structure, oil mist distribution and the like from the viewpoint of design parameters. The traditional centrifugal atomizing nozzle with the heat shield is provided with an air inlet small hole through processing the heat shield, air flows into the small hole after entering the two channels of the combustion chamber, and is combusted in the flame tube after being mixed with fuel oil at the outlet of the centrifugal atomizing nozzle. But traditional centrifugal atomizing nozzle with heat shield atomizes fuel through the interaction of the cyclone and nozzle orifice of the nozzle, and the atomization effect of the fuel is limited. Disclosure of Invention The invention provides a centrifugal atomizing nozzle with a front swirling flow, which is used for solving the defect that in the prior art, fuel oil is atomized only through interaction of a swirler arranged in the nozzle and small holes of a nozzle opening, and the atomization effect of the fuel oil is improved to a limited extent. The invention provides a centrifugal atomizing nozzle with a front cyclone, which comprises: the heat insulation cover is internally provided with a cavity, the side wall of the heat insulation cover is provided with a first through hole and a second through hole, and the first through hole, the second through hole and the cavity are communicated; the nozzle body is partially arranged in the cavity, and the outlet end of the nozzle body is communicated with the outside through the second through hole; And the vortex assembly is arranged in the cavity and is positioned between the first through hole and the second through hole and used for forming gas turbulence and gas vortex. According to the invention, a swirl-prepositioned centrifugal atomizing nozzle is provided, and the swirl assembly comprises: The first vortex device is arranged between the outer wall of the nozzle body and the inner wall of the cavity, and is provided with a plurality of first vortex holes which are arranged at intervals in a circular shape; The second vortex device is arranged between the nozzle body and the inner wall of the cavity and is arranged at an upper-lower interval with the first vortex device, and is provided with a plurality of second vortex holes which are arranged at a circular interval; The swirling direction of the first vortex hole is opposite to the swirling direction of the second vortex hole. According to the centrifugal atomizing nozzle with the front swirling flow, the first swirling flow device further comprises the first swirling flow plate body, the first swirling flow holes are formed in the first swirling flow plate body, two first swirling flow plate bodies are arranged and are enclosed on the periphery of the nozzle body, and the periphery of the two first swirling flow plate bodies is connected with the inner wall of the cavity. According to the centrifugal atomizing nozzle with the front swirling flow, the second swirling flow device further comprises second swirling flow plate bodies, the second swirling flow holes are formed in the second swirling flow plate bodies, two second swirling flow plate bodies are arranged and surround the periphery of the nozzle body, and the periphery of the two second swirling flow plate bodies is connected with the inner wall of the cavity. According to the centrifugal atomizing nozzle with the front swirling flow, the nozzle body comprises a first guide pipe, and the first guide pipe penetrates through the connecting part of the nozzle body and extends to the inside of the cavity partially; The nozzle body connecting part is provided with a limiting part, and the nozzle body connecting part is in sealing connection with the heat shield through the limiting part; The first conduit is internally provided with a first flow passage, and the first vortex device and the second vortex device are both positioned between the outer wall of the first conduit and the inner wall of the cavity. According to the centrifugal atomizing nozzle with the front cyclone, one end of the first conduit, which is positioned outside the cavity, is provided with the second conduit, t