CN-121976882-A - Wide-range working condition spraying stability structure and oil supply method

CN121976882ACN 121976882 ACN121976882 ACN 121976882ACN-121976882-A

Abstract

The invention discloses a wide-range working condition spraying and stabilizing structure and an oil supply method, wherein the structure comprises a spraying and stabilizing system casing, a first spraying and stabilizing component, a second spraying and stabilizing component, an inner cone, a concave cavity ignition oil injection rod, a mixer regulating plate and a mixer casing, the first spraying stabilizing component, the second spraying stabilizing component and the mixer casing are connected with the inner wall of the spraying stabilizing system casing, the inner cone is installed on the turbine support of the engine, the inner cone and the spraying stabilizing system casing are coaxially arranged, the concave cavity ignition oil injection rod is installed in the inner cavity of the inner cone, and the mixer regulating plate is connected with the mixer casing. The invention is provided with five oil injection rods, wherein II, III, IV paths of main pipe oil injection rods, a first injection stabilizing component and a second injection stabilizing component are integrally designed, and the provided I path oil injection rod determines whether to put into operation according to the total internal temperature and the range of the bypass ratio, so that the requirements of oil supply, efficient tissue combustion and stable operation of the afterburner of the variable cycle aeroengine under the wide-range conditions of the bypass ratio of 0.2-1, the total internal temperature of 950K-1500K and the pressure of 50-600kPa can be met.

Inventors

ZHOU KAIFU
WANG LINQUAN
Cai Dengyou
ZHANG YAOSHUO
XIE WENDA
Zhou Gongtong

Assignees

中国航发贵阳发动机设计研究所

Dates

Publication Date: 20260505
Application Date: 20260120

Claims (10)

1. The wide-range working condition injection stability structure is characterized by comprising an injection stability system casing (1), a first injection stability component (2), a second injection stability component (3), an inner cone (4), a concave cavity ignition oil injection rod (5), a mixer regulating piece (6) and a mixer casing (7), wherein the first injection stability component (2), the second injection stability component (3) and the mixer casing (7) are connected with the inner wall of the injection stability system casing (1), the inner cone (4) is arranged on an engine turbine support, the inner cone (4) and the injection stability system casing (1) are coaxially arranged, the concave cavity ignition oil injection rod (5) is arranged in the inner cavity of the inner cone (4), the mixer regulating piece (6) is connected with the mixer casing (7), the inner cavities of the first injection stability component (2) and the second injection stability component (3) are respectively provided with a path oil injection rod assembly, and the path injection rod assembly comprises an I path oil injection rod (8), a II path main pipe (9), a III path main pipe (10) and an IV path main pipe (11).
2. The wide-range working condition spraying stability structure of claim 1 is characterized in that the length of the first spraying stability component (2) is larger than that of the second spraying stability component (3), the first spraying stability component (2) and the second spraying stability component (3) are alternately and circumferentially uniformly distributed in the spraying stability system casing (1), the inner cavities of the first spraying stability component (2) and the second spraying stability component (3) are respectively provided with an I-path oil spraying rod (8), one end of the I-path oil spraying rod (8) is connected with the spraying stability system casing (1) through a pipe joint, the inner cavities of the first spraying stability component (2) and the second spraying stability component (3) are provided with a circular evaporation cavity (101) and a radial evaporation cavity (102), the circular evaporation cavity (101) and the radial evaporation cavity (102) are communicated, and the inner cavity of the inner cone (4) is provided with a concave cavity (41).
3. The wide-range working condition spraying and stabilizing structure according to claim 1, wherein an II-path main pipe (9), an III-path main pipe (10) and an IV-path main pipe (11) are sequentially arranged on the air inlet side of the inner cavities of the first spraying and stabilizing component (2) and the second spraying and stabilizing component (3) from right to left, and one ends of the II-path main pipe (9), the III-path main pipe (10) and the IV-path main pipe (11) are connected with a spraying and stabilizing system casing (1) through pipe joints.
4. A method for supplying oil by a wide-range working condition stable spraying structure as claimed in any one of claims 1 to 3, which is characterized by comprising the steps of operating a concave cavity ignition oil spraying rod (5), an I-path oil spraying rod (8), an II-path main pipe (9), a III-path main pipe (10) and an IV-path main pipe (11) under the working conditions of different bypass ratios and total internal temperature, and adjusting the oil supply condition of the wide-range working condition stable spraying structure, thereby adjusting the state of an engine.
5. The wide-range working condition oil supply method of the oil injection stabilizing structure is characterized in that whether the oil injection rod (8) is put into operation or not is determined according to the value of the total internal temperature, the oil injection rod (8) is put into operation when the total internal temperature is less than or equal to 1200K, oil is supplied to the annular evaporation cavity (101) and the radial evaporation cavity (102) of the first oil injection stabilizing component (2) and the second oil injection stabilizing component (3), the oil injection rod (8) is cut off when the total internal temperature is more than 1200K, and the functions of the annular evaporation cavity (101) and the radial evaporation cavity (102) of the first oil injection stabilizing component (2) and the second oil injection stabilizing component (3) are switched into cooling cavities, and the tail edges of the first oil injection stabilizing component (2) and the second oil injection stabilizing component (3) are cooled.
6. The method for supplying oil by adopting the wide-range working condition stable spraying structure according to claim 4, wherein the IV line main pipe (11) determines whether to put into operation according to the numerical value of the bypass ratio, the bypass ratio is in the range of 0.5-1, the IV line main pipe (11) supplements fuel to the airflow area in the afterburner, the bypass ratio is in the range of 0.2-0.5, the fuel does not need to be supplemented, and the IV line main pipe (11) cuts off the operation.
7. The wide-range working condition stable spraying structure oil supply method is characterized in that the wide-range working condition stable spraying structure supplies oil under the condition that the bypass ratio is 0.5-1 and the total internal temperature is less than or equal to 1200K, the concave cavity ignition spray rod (5) supplies oil to the concave cavity (41) to be connected and applied with force, the I-path oil spray rod (8) supplies oil to the annular evaporation cavity (101) and the radial evaporation cavity (102) of the first stable spraying component (2) and the second stable spraying component (3), the engine enters a small force application working state, then the II-path main pipe (9) and the IV-path main pipe (11) are put into operation to supply oil to a main flow area, the engine enters a partial force application working state, and finally the III-path main pipe (10) is put into operation to supply oil to the main flow area, and the engine enters a full force application working state.
8. The wide-range working condition stable spraying structure oil supply method is characterized in that the wide-range working condition stable spraying structure oil supply law is that a concave cavity ignition spray rod (5) is firstly used for supplying oil to a concave cavity (41) to be supplied with power under the condition that the bypass ratio is 0.5-1 and the total internal temperature is more than 1200K, a II-path main pipe (9) is used for supplying oil to a main flow area, an engine enters a small-power working state, an IV-path main pipe (11) is used for supplying oil to the main flow area, the engine enters a partial-power working state, and a III-path main pipe (10) is used for supplying oil to the main flow area, and the engine enters a full-power working state.
9. The wide-range working condition stable spraying structure oil supply method is characterized in that the wide-range working condition stable spraying structure oil supply law under the condition that the bypass ratio is 0.2-0.5 and the total internal temperature is less than or equal to 1200K is that a concave cavity ignition spray rod (5) is firstly used for supplying oil to a concave cavity (41) to be connected and applied with force, an I-path oil spray rod (8) is used for supplying oil to annular evaporation cavities (101) and radial evaporation cavities (102) of a first stable spraying component (2) and a second stable spraying component (3), an engine enters a small force application working state, then an II-path main pipe (9) is used for supplying oil to a main flow area, the engine enters a partial force application working state, a III-path main pipe (10) is used for supplying oil to the main flow area, and the engine enters a full force application working state.
10. The wide-range working condition stable spraying structure oil supply method is characterized in that the wide-range working condition stable spraying structure oil supply law under the condition that the bypass ratio is 0.2-0.5 and the total internal temperature is more than 1200K is that a concave cavity ignition spray rod (5) firstly supplies oil to a concave cavity (41) to be connected and applied with force, a II-path main pipe (9) works to supply oil to a main flow air flow area, an engine enters a small force application working state, then the II-path main pipe (9) continues to increase fuel oil supply, the engine enters a partial force application working state, and finally a III-path main pipe (10) works to supply oil to the main flow air flow area, and the engine enters a full force application working state.

Description

Wide-range working condition spraying stability structure and oil supply method Technical Field The invention belongs to the technical field of aeroengines, and particularly relates to a wide-range working condition spraying stability structure and an oil supply method. Background With the rapid development of military technology requirements and aero-engine technology, aero-engines give consideration to better economic indexes and more powerful thrust indexes, and become a main technical route for the development of the existing aero-engines. The technical core of the wide-range Variable cycle engine (Variable CYCLE ENGINE, VCE) is to dynamically adjust the structure and the working mode of the engine, so that the engine has the advantages of rapid thrust under a small bypass ratio and low oil consumption under a medium bypass ratio, and can keep the optimal performance under the flight conditions of subsonic speed, transonic speed, supersonic speed, hypersonic speed and the like. For this reason, wide-range variable cycle engines are regarded as strategic technologies by the large aviation countries, and have been the focus of research. The working condition of the afterburner matched with the wide-range variable cycle engine is that the bypass ratio is 0.2-1, the total internal temperature is 950K-1500K, the pressure is 50kPa-600kPa, the total internal temperature of the afterburner is connected across the third-generation aeroengine, wherein the total internal temperature of the afterburner of the third-generation aeroengine is 950K-1200K, the total internal temperature of the afterburner of the fourth-generation aeroengine is 1200K-1350K, the total internal temperature of the afterburner of the fifth-generation aeroengine is more than 1350K, and the working condition parameter variation range is large. The afterburner oil supply system has great design difficulty, and the conventional oil supply system has difficulty in meeting the wide-range use requirement. Therefore, a wide-range working condition injection stability system and an oil supply rule method are required to be provided, the oil supply requirement of the afterburner of the wide-range variable cycle engine can be considered, and the technical problems of efficient tissue combustion and stable work of the wide-range afterburner are solved. The patent application document with the application number of CN113513408A discloses a combined oil supply device, a combustion chamber and an oil supply method, wherein the combined oil supply device comprises a radially extending oil supply mechanism, a radial stabilizer arranged at the rear of the oil supply mechanism and a connecting section for connecting the oil supply mechanism and the radial stabilizer, and the oil supply mechanism comprises an oil injection rod and an oil supply pipe which is coaxially distributed with the oil injection rod and is arranged at the outer side of the oil injection rod. The combined oil supply device can solve the heat protection problem under the condition of high temperature and large incoming flow and the problem of high-efficiency combustion organization under the condition of low temperature and large incoming flow. But this patent is used for ramjet engines, operating temperatures in the range 500K-600K, and not for turbofan engine afterburners, operating temperatures in the range 900K-1400K. Disclosure of Invention In order to solve the technical problems, the invention provides a wide-range working condition spraying and stabilizing structure and an oil supply method. The invention is realized by the following technical scheme. The invention provides a wide-range working condition injection stabilizing structure which comprises an injection stabilizing system casing, a first injection stabilizing member, a second injection stabilizing member, an inner cone, a concave cavity ignition oil injection rod, a mixer adjusting plate and a mixer casing, wherein the first injection stabilizing member, the second injection stabilizing member and the mixer casing are connected with the inner wall of the injection stabilizing system casing, the inner cone is arranged on an engine turbine support, the inner cone is coaxially arranged with the injection stabilizing system casing, the concave cavity ignition oil injection rod is arranged in an inner cavity of the inner cone, the mixer adjusting plate is connected with the mixer casing, the inner cavities of the first injection stabilizing member and the second injection stabilizing member are respectively provided with a road oil injection rod assembly, and the road oil injection rod assembly comprises an I road oil injection rod, a II road main pipe, a III road main pipe and an IV road main pipe. Preferably, the length of the first spraying stable component is greater than that of the second spraying stable component, the first spraying stable component and the second spraying stable component are alternately and circumfer