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CN-122015134-A - Evaporation pipe oil supply device and combustion chamber

CN122015134ACN 122015134 ACN122015134 ACN 122015134ACN-122015134-A

Abstract

The invention relates to the technical field of aeroengines, and discloses an evaporation tube oil supply device and a combustion chamber. The evaporation tube oil supply device comprises a tube body and an oil delivery tube, wherein the tube body comprises an atomization section, a main air inlet and a plurality of sub air inlets are arranged along the axial direction, the sub air inlets are arranged along the circumferential direction, and the main air inlet is intersected with the air flow direction of the sub air inlets to form shearing air flow. The oil delivery pipe comprises an oil injection part which is arranged towards a main air inlet of the atomization section and is used for injecting fuel oil to the inner wall of the atomization section. By means of the design that the axial air inlet and the circumferential multi-strand air inlet are intersected, the atomization and crushing effects of the fuel oil are remarkably enhanced by utilizing the shearing effect of multiple air flows in the evaporating pipe.

Inventors

  • WANG LIANG
  • JIANG LIJUN
  • XU JIAQI
  • TANG ZHUO
  • GAN TIAN

Assignees

  • 中国航发湖南动力机械研究所

Dates

Publication Date
20260512
Application Date
20260204

Claims (10)

  1. 1. An evaporating pipe oil supply device, comprising: The pipe body (1) comprises an atomization section (101), wherein the atomization section (101) is provided with a main air inlet (1012) and a plurality of sub air inlets (10111), the main air inlet (1012) is arranged along the axial direction of the atomization section (101), the plurality of sub air inlets (10111) are arranged along the circumferential direction of the atomization section (101), and the air flow directions of the main air inlet (1012) and the sub air inlets (10111) are intersected; oil delivery pipe (2) comprising an injection portion (201), said injection portion (201) being directed towards a main air inlet (1012) of said atomizing section (101).
  2. 2. The evaporation tube oil supply device according to claim 1, wherein the atomizing section (101) is provided with a diversion area (1011), the sub-air inlet (10111) is provided in the diversion area (1011), the diversion area (1011) is provided with a multi-stage diversion structure group (10112), the diversion structure group (10112) comprises a plurality of diversion sheets (10112-1), the diversion sheets (10112-1) are in one-to-one correspondence with the sub-air inlet (10111), the diversion sheets (10112-1) are arranged at an included angle with the atomizing section (101) and face one end away from the main air inlet (1012), and the diversion sheets (10112-1) partially cover the sub-air inlet (10111).
  3. 3. The evaporating pipe oil supply device according to claim 2, wherein the diversion structure groups (10112) are distributed at intervals along the axial direction of the diversion area (1011), and the diversion structure groups (10112) of two adjacent stages are staggered in the circumferential direction, and the included angle between the diversion sheet (10112-1) and the inner wall of the diversion area (1011) is gradually increased along the air flow direction of the main air inlet (1012).
  4. 4. The evaporation tube oil supply device according to claim 2, characterized in that the atomizing section (101) is further provided with a transition zone (1013), the transition zone (1013) connecting the main air inlet (1012) and the flow guiding zone (1011), the pipe diameter of the transition zone (1013) increasing from the main air inlet (1012) to the flow guiding zone (1011).
  5. 5. The evaporation tube oil supply device according to claim 2, wherein the tube body (1) is further provided with a mixing section (102), one end of the mixing section (102) is provided with an air outlet (1021), the other end is connected with the diversion area (1011), and the mixing section (102) is at least partially arranged at an included angle with the diversion area (1011).
  6. 6. A vaporizing tube oil supply device according to claim 5, wherein the temperature of the mixing section (102) is higher than the temperature of the atomizing section (101).
  7. 7. The evaporator tube oil supply device according to claim 4, wherein the oil injection portion (201) extends into the transition region (1013) along the axial direction of the atomizing section (101), the oil injection portion (201) is provided with at least one oil injection port (202), and the axial direction of the oil injection port (202) is disposed at an angle with the axial direction of the atomizing section (101).
  8. 8. A combustion chamber, comprising: the casing (3) comprises an outer casing (301) and an inner casing (302), which are coaxially arranged and connected with each other, and an annular airflow channel (5) is formed between the two casings; the flame tube (4) is arranged in the airflow channel (5) and is connected with the casing (3); The evaporation tube oil supply apparatus as defined in any one of claims 1 to 7, wherein a tube body (1) is mounted on the flame tube (4), and a mixing section (102) partially extends into the flame tube (4).
  9. 9. The combustor according to claim 8, wherein a plurality of evaporation tube oil supply devices are arranged on the flame tube (4), and the evaporation tube oil supply devices are distributed at intervals along the circumferential direction of the flame tube (4), and oil delivery tubes (2) of the evaporation tube oil supply devices are connected with the casing (3).
  10. 10. The combustion chamber according to claim 8, characterized in that the flame tube (4) is provided with a combustion zone (401), the mixing section (102) is a bent tube section, and the air outlet (1021) is directed in the axial direction towards the combustion zone (401).

Description

Evaporation pipe oil supply device and combustion chamber Technical Field The invention relates to the technical field of aeroengines, in particular to an evaporation tube oil supply device and a combustion chamber. Background In the technical field of aeroengines, an evaporation tube oil supply device is used as a fuel oil atomization and mixing device with simple structure and low cost, and is usually partially arranged in a flame tube, and the wall of the tube is heated by high-temperature fuel gas to promote the fuel oil in the tube to evaporate and mix with air, so as to form premixed gas, and then the premixed gas is sprayed into a combustion zone. However, the atomization process of the conventional evaporating tube is excessively dependent on the heating effect of high-temperature fuel gas in the flame tube, and the air inlet structure of the conventional evaporating tube is limited in pneumatic atomization effect. This is especially obvious under the operating mode such as low air pressure, low velocity of flow, leads to the fuel atomization quality not good, and the oil droplet particle diameter is great, and oil gas mixing is uneven, and then causes the problem such as ignition difficulty, unstable and combustion efficiency decline. Disclosure of Invention In view of the above, the invention provides an evaporation tube oil supply device and a combustion chamber, so as to solve the problem of poor atomization quality of the evaporation tube oil supply device under a certain working condition. The invention provides an evaporation tube oil supply device which comprises a tube body and an oil delivery tube, wherein the tube body comprises an atomization section, the atomization section is provided with a main air inlet and a plurality of sub air inlets, the main air inlet is arranged along the axial direction of the atomization section, the sub air inlets are arranged along the circumferential direction of the atomization section, the main air inlet is intersected with the sub air inlets in the air flow direction, and the oil delivery tube comprises an oil injection part which faces the main air inlet of the atomization section. In an alternative embodiment, the atomizing section is provided with a flow guiding area, the sub-air inlet is arranged in the flow guiding area, the flow guiding area is provided with a multi-stage flow guiding structure group, the flow guiding structure group comprises a plurality of flow guiding sheets, the flow guiding sheets are in one-to-one correspondence with the sub-air inlets, the flow guiding sheets are arranged at an included angle with the atomizing section and face towards one end deviating from the main air inlet, and the flow guiding sheets partially cover the sub-air inlets. In an alternative embodiment, the diversion structure groups are distributed at intervals along the axial direction of the diversion area, and the adjacent two-stage diversion structure groups are staggered in the circumferential direction, and the included angle between the diversion sheet and the inner wall of the diversion area is gradually increased along the airflow direction of the main air inlet. In an alternative embodiment, the atomizing section is further provided with a transition region, the transition region is connected with the main air inlet and the diversion region, and the pipe diameter of the transition region increases from the main air inlet to the diversion region. In an alternative embodiment, the tube body is further provided with a mixing section, one end of the mixing section is provided with an air outlet, the other end of the mixing section is connected with the diversion area, and the mixing section and the diversion area are at least partially arranged at an included angle. In an alternative embodiment, the temperature of the mixing section is higher than the temperature of the atomizing section. In an alternative embodiment, the oil injection part extends into the transition zone along the axial direction of the atomizing section, the oil injection part is provided with at least one oil injection port, and the axial direction of the oil injection port and the axial direction of the atomizing section form an included angle. The invention further provides a combustion chamber which comprises a casing, a flame tube and the evaporation tube oil supply device in the first aspect, wherein the casing comprises an outer casing and an inner casing which are coaxially arranged and connected with each other to form an annular airflow channel, the flame tube is arranged in the airflow channel and connected with the casing, the tube body of the evaporation tube oil supply device is arranged on the flame tube, and the mixing section part extends into the flame tube. In an alternative embodiment, a plurality of evaporation tube oil supply devices are arranged on the flame tube, and the evaporation tube oil supply devices are distributed at intervals along the circumferen