CN-122014644-A - Multifunctional integrated support plate for centrifugal compressor outlet

CN122014644ACN 122014644 ACN122014644 ACN 122014644ACN-122014644-A

Abstract

The invention relates to the technical field of aeroengines, in particular to a multifunctional integrated support plate for a centrifugal compressor outlet and a design method thereof, comprising an annular hub support plate, an annular casing support plate, a blunt body and a fuel injection system, wherein the inner ring of the annular hub support plate is gradually reduced along the airflow direction, and a diffusion channel is formed between the outer wall of the annular hub support plate and the inner wall of the annular casing support plate; the fuel injection system comprises fuel injection rods which radially penetrate into each blunt body in the diffusion channel along the outer wall of the annular casing support plate, a plurality of fuel injection nozzles are uniformly distributed on the tail edge surface of the blunt body, and each fuel injection nozzle is communicated with the fuel injection rods on the corresponding blunt body in the blunt body. The integrated support plate structure has the functions of guiding, decelerating and burning, and shortens the axial dimension.

Inventors

LI ZILIANG
Yang Rongkuan
LIU XUAN
CHEN YUFEI
Xu Shenren
LIU QIANG

Assignees

西北工业大学
西北工业大学深圳研究院

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (8)

1. A multifunctional integrated support plate for a centrifugal compressor outlet, comprising: The annular hub support plate and the annular casing support plate are gradually reduced along the airflow direction, and a diffusion channel is formed between the annular hub support plate and the annular casing support plate; the blunt bodies are uniformly distributed and arranged in a diffusion channel formed between the annular hub support plate and the annular casing support plate; The fuel injection system comprises fuel injection rods which radially penetrate into each blunt body in the diffusion channel along the outer wall of the annular casing support plate, a plurality of fuel injection nozzles are uniformly distributed on the tail edge surface of the blunt body, and each fuel injection nozzle is communicated with the fuel injection rod on the corresponding blunt body in the blunt body.
2. The multifunctional integrated support plate for the centrifugal compressor outlet according to claim 1, wherein the annular hub support plate has a divergence angle ranging from 0 degrees to 15 degrees relative to the inner wall of the annular casing support plate.
3. The multifunctional integrated support plate for centrifugal compressor outlet according to claim 1, wherein the ratio of the outlet area to the inlet area of the diffuser channel is equal to the expansion ratio of the prototype integrated support plate.
4. The design method of the multifunctional integrated support plate for the centrifugal compressor outlet is characterized by comprising the following steps of: obtaining the expansion ratio of the prototype integrated support plate according to the inlet area and the outlet area of the prototype integrated support plate; designing the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate according to the pneumatic characteristics and the expansion angle range; According to the axial length of the prototype hub support plate, the inlet height of an axial channel formed between the prototype hub support plate and the casing, the radius of the inner ring at the inlet of the prototype hub support plate, the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate and the expansion ratio of the prototype integrated support plate, and the radius of the inner ring at the outlet of the annular hub support plate and the shortened length of the annular hub support plate relative to the prototype hub support plate are obtained; acquiring the length of the annular hub support plate based on the shortened length of the annular hub support plate relative to the prototype hub support plate, the axial length of the prototype hub support plate and the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate; Based on the length of the annular hub support plate and the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate, designing an integrated support plate; The circumferential distance between two adjacent fuel injection systems is obtained according to the circumference of the inner wall line at the outlet of the annular hub support plate and the number of radial diffusers of the centrifugal compressor; Based on the circumferential distance between two adjacent fuel injection systems of the designed fuel injection system and the circumferential width of the single fuel injection system, the length of the annular hub support plate and the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate are designed into an integrated support plate.
5. The method for designing a multifunctional integrated support plate for a centrifugal compressor outlet according to claim 4, wherein the step of the inner ring radius at the outlet of the annular hub support plate is as follows: In the formula, Representing the radius of an inner ring at the outlet of the annular hub support plate; Represents the radius of the inner ring at the inlet of the annular hub support plate, Representing the expansion ratio; The inlet height of the axial channel formed between the prototype hub support plate and the casing is represented, wherein the radius of the inner ring at the inlet of the annular hub support plate is equal to the radius of the inner ring at the inlet of the prototype hub support plate, and the inlet height of the diffusion channel is equal to the inlet height of the axial channel formed between the prototype hub support plate and the casing.
6. The method of claim 4, wherein the annular hub support plate has a reduced length relative to the prototype hub support plate: In the formula, Representing the shortened length of the annular hub support plate relative to the prototype hub support plate; Representing the axial length of the prototype hub support plate; representing the radius of an inner ring at the inlet of the annular hub support plate; Representing the radius of an inner ring at the outlet of the annular hub support plate; the expanding angle of the annular hub support plate relative to the inner wall of the annular casing support plate is shown.
7. The method for designing a multifunctional integrated support plate for a centrifugal compressor outlet according to claim 4, wherein the circumferential distance between two adjacent fuel injection systems is: In the formula, Representing the circumferential distance between two adjacent fuel injection systems; representing the circumference of an inner wall line at the outlet of the annular hub support plate; Representing the number of radial diffusers of the centrifugal compressor; Representing the radius of the inner ring at the outlet of the annular hub support plate.
8. The method for designing a multifunctional integrated support plate for a centrifugal compressor outlet according to claim 7, wherein the circumferential width of a single fuel injection system is 0.1 to 0.2 times the circumferential distance between two adjacent fuel injection systems.

Description

Multifunctional integrated support plate for centrifugal compressor outlet Technical Field The invention relates to the technical field of aeroengines, and also can be applied to the fields of automobile engines, unmanned aerial vehicles and miniature gas turbines with centrifugal compressor axial support plates, in particular to a multifunctional integrated support plate for a centrifugal compressor outlet and a design method thereof. Background This requirement for engine size reduction is particularly important in the large context of smaller aircraft engines with wider airspace, wider speed ranges, and longer range. The centrifugal compressor and the combustion chamber are used as two major core components of the small aeroengine, and are usually connected by an axial support plate, as shown in fig. 7, a traditional centrifugal compressor structure schematic diagram with the axial support plate is provided, and as can be seen from fig. 7, the axial support plate has the main function of converting radial air flow at the outlet of the centrifugal compressor into axial air flow, thus creating necessary conditions for tissue combustion in the subsequent combustion chamber. However, the axial support plate and the downstream combustion chamber are relatively independent in configuration design for a long time and have single functions, and the corresponding comprehensive efficiency is difficult to develop under the condition of occupying a large space. Accordingly, it is desirable to provide a multi-functional integrated support plate for centrifugal compressor outlets to address the above-described problems. Disclosure of Invention Aiming at the problems that the prior art is limited by the technical level of the prior aero-engine, the axial support plate and the downstream combustion chamber are relatively independent in structural design for a long time, the functions of the axial support plate and the downstream combustion chamber are single, and corresponding comprehensive efficiency is difficult to develop under the condition of occupying a large space, the invention provides a multifunctional integrated support plate for an outlet of a centrifugal compressor, and the problems in the prior art are solved. The first aspect of the invention provides a multifunctional integrated support plate for an outlet of a centrifugal compressor, which adopts the following technical scheme that: The annular hub support plate and the annular casing support plate are gradually reduced along the airflow direction, and a diffusion channel is formed between the annular hub support plate and the annular casing support plate; the blunt bodies are uniformly distributed and arranged in a diffusion channel formed between the annular hub support plate and the annular casing support plate; The fuel injection system comprises fuel injection rods which radially penetrate into each blunt body in the diffusion channel along the outer wall of the annular casing support plate, a plurality of fuel injection nozzles are uniformly distributed on the tail edge surface of the blunt body, and each fuel injection nozzle is communicated with the fuel injection rod on the corresponding blunt body in the blunt body. According to the further technical scheme, the expansion angle range of the annular hub support plate relative to the inner wall of the annular casing support plate is 0-15 degrees. According to the further technical scheme, the ratio of the outlet area to the inlet area of the diffusion channel is equal to the expansion ratio of the prototype integrated support plate. The second aspect of the present invention provides a design method of a multifunctional integrated support plate for an outlet of a centrifugal compressor, comprising: obtaining the expansion ratio of the prototype integrated support plate according to the inlet area and the outlet area of the prototype integrated support plate; designing the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate according to the pneumatic characteristics and the expansion angle range; According to the axial length of the prototype hub support plate, the inlet height of an axial channel formed between the prototype hub support plate and the casing, the radius of the inner ring at the inlet of the prototype hub support plate, the expansion angle of the annular hub support plate relative to the inner wall of the annular casing support plate and the expansion ratio of the prototype integrated support plate, and the radius of the inner ring at the outlet of the annular hub support plate and the shortened length of the annular hub support plate relative to the prototype hub support plate are obtained; acquiring the length of the annular hub support plate based on the shortened length of the annular hub support plate relative to the prototype hub support plate, the axial length of the prototype hub support plate and the expansion an