CN113532870B - Online identification system for working mode of engine - Google Patents
Online identification system for working mode of engine Download PDFInfo
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- CN113532870B CN113532870B CN202110917157.0A CN202110917157A CN113532870B CN 113532870 B CN113532870 B CN 113532870B CN 202110917157 A CN202110917157 A CN 202110917157A CN 113532870 B CN113532870 B CN 113532870B
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 65
- 239000013307 optical fiber Substances 0.000 claims abstract description 42
- 238000012545 processing Methods 0.000 claims abstract description 32
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 230000010354 integration Effects 0.000 claims abstract description 15
- 230000035939 shock Effects 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000005855 radiation Effects 0.000 claims abstract description 6
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 10
- 235000017491 Bambusa tulda Nutrition 0.000 description 10
- 241001330002 Bambuseae Species 0.000 description 10
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 10
- 239000011425 bamboo Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses an engine working mode online identification system, which comprises: the base body is arranged on the inner wall of an engine combustion chamber and is provided with an integrated end positioned on one side of the inner wall of the engine combustion chamber; the sensor group is integrated at the integration end of the base body and used for collecting experimental data in the engine combustion chamber; the calculation processing module is in communication connection with the sensor group and is used for receiving the experimental data acquired by the sensor group and analyzing and processing the experimental data; through the provided engine working mode online identification system, the isolation section shock wave intensity in the combustion chamber is collected through the force sensor module and the optical fiber sensor module respectively, the optical signal of spontaneous radiation in the combustion chamber is received, the collected pressure and the optical signal are converted into corresponding voltage signals respectively, and the voltage signals are subjected to operation processing through the calculation processing module to determine the isolation section shock wave intensity, the flame propagation speed and the flame state.
Description
Technical Field
The invention relates to the technical field of aerospace engine combustion chamber measurement, in particular to an engine working mode online identification system.
Background
Flame propagation speed, combustion state, shock wave intensity of an isolation section and the like in the aerospace engine are directly related to the combustion process and thrust characteristics of the engine.
In the process of developing a model engine, the problems that the space for setting a measuring window is limited, the environment is in a severe aerodynamic thermal load environment, high-temperature thermal sealing is achieved and the like exist, and in a limited space on the performance test site of the model engine, precise optical and mechanical experiments are synchronously and integrally carried out so as to judge the shock wave intensity and the flame combustion state of an engine isolation section and obtain multi-field coupling information, which is difficult to achieve, and the complexity of the synchronous online visualization experiment of the engine and the development and matching of the model engine is increased.
In addition, the conventional method for separately arranging the optical fiber sensor and the pressure sensor on the inner wall of the combustion chamber has the following problems because the wall surface of the combustion chamber needs to be separately provided with holes for installation:
(1) When the sensor extends into the wall surface for measurement, the protruding sensor structure can affect the flow field in the combustion chamber, and is not beneficial to accurately collecting various data;
(2) The sensor is arranged in the combustion chamber through the hole, so that the influence of unsmooth or concave-convex or similar reasons on the inner wall surface of the combustion chamber can be caused, the interference on the characteristics of an internal flow field such as shock waves can be generated, and the great influence on an engine can be particularly caused under the condition of high flow velocity of the internal flow field;
(3) The cross-section of the existing novel combustion chamber is circular or arc-shaped, the wall surface has curvature of a specific orientation, and the force sensor and the optical fiber sensor are independently perforated and are respectively arranged to ensure the repeatability of measurement.
Disclosure of Invention
The invention aims to provide an engine working mode online identification system to solve the problems in the prior art.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
an engine operating mode online identification system is provided with:
the base body is arranged on the inner wall of an engine combustion chamber and is provided with an integration end positioned on one side of the inner wall of the engine combustion chamber;
the sensor group is integrated at the integration end of the base body and used for collecting experimental data in the engine combustion chamber;
the calculation processing module is in communication connection with the sensor group and is used for receiving the experimental data acquired by the sensor group and analyzing and processing the experimental data; wherein,
the end face of the integrated end is flush with the surface of the inner wall.
As a preferable scheme of the invention, a substrate mounting hole communicated with the inner wall of the engine combustion chamber is formed in the engine combustion chamber, and the substrate mounting hole consists of an inner thread section on the outer side and a through hole section on the inner side;
the base member including the cooperation the screw thread section of thick bamboo that the internal thread section of base member mounting hole is connected, and with screw thread section of thick bamboo integrated into one piece's regular hexagonal connecting block, regular hexagonal connecting block is through linking the screw thread section of thick bamboo is twisted the base member mounting hole with the engine combustion chamber is connected, the screw thread section of thick bamboo with the inside central point of regular hexagonal connecting block puts through setting up the through-hole that link up and is used for the installation integrated end.
As a preferable aspect of the present invention, the sensor group includes force sensors, and at least two optical fiber sensors are arranged in three distribution forms selected according to characteristics of pressure acquisition points, the force sensors are installed along an axial center position of the integration end, and a plurality of the optical fiber sensors are distributed in a matrix around the axial center of the integration end.
As a preferred aspect of the present invention, the three distribution patterns of the sensor group include:
the first form: the force sensor and the two optical fiber sensors are included, and the two optical fiber sensors are symmetrically distributed around the central axis of the force sensor;
the second form: the force sensor comprises the force sensor and eight optical fiber sensors, and the eight optical fiber sensors are correspondingly divided into four groups in pairs and are respectively arranged on the horizontal and longitudinal central axes of the force sensor;
the third form: the force sensor and the eight optical fiber sensors are included, and the eight optical fiber sensors are symmetrically distributed around the periphery center of the force sensor.
As a preferred scheme of the present invention, the calculation processing module is disposed in a central control device of the combustion chamber, and the calculation processing module is respectively in communication connection with the force sensor and the plurality of optical fiber sensors through external data lines;
the force sensor is used for collecting the shock wave intensity of the isolation section in the combustion chamber, converting a pressure signal into a voltage signal and transmitting the voltage signal to the calculation processing module;
the optical fiber sensors are used for receiving optical signals of spontaneous radiation in the combustion chamber, carrying out photomultiplier multiplication and mode electricity conversion to obtain optical signals, carrying out wavelength selection amplification processing on the optical signals to convert the optical signals into corresponding voltage signals, converting the voltage signals into voltage signals and transmitting the voltage signals to the calculation processing module.
As a preferred scheme of the invention, the integrated end comprises a sensor mounting column rotatably connected with a through hole on the inner side of the base body, and inner wall flush columns and angle adjusting discs which are arranged at the front end and the rear end of the sensor mounting column;
a large mounting hole for mounting the force sensor is formed in the axial central axis of the sensor mounting column, and small mounting holes for mounting a corresponding number of optical fiber sensors are formed in the sensor mounting column around the periphery of the large mounting hole;
the inner wall leveling column is used for filling the inner side through hole section of the base body mounting hole and leveling with the inner wall, detection holes which are communicated with the large mounting holes and the small mounting holes in the sensor mounting column in a matched mode are formed in the inner wall leveling column, and detection structures of the force sensor and the optical fiber sensors penetrate through the detection holes to detect the inside of the engine combustion chamber;
the angle adjusting disc is attached to the end face of the regular hexagonal connecting block, and four arc-shaped bolt grooves distributed along the axial direction of the angle adjusting disc are formed in the angle adjusting disc.
As a preferable scheme of the present invention, the front end surface of the inner wall flush column has the same curvature as that of the inner wall of the combustion chamber, and the angle adjustment disc rotates together with the inner wall flush column through the sensor mounting column to adjust the orientation of the curved surface.
As a preferable scheme of the present invention, threaded holes are formed in the end surfaces of the inner wall flush columns at positions close to six corners, the six threaded holes are overlapped with any one of the arc-shaped bolt grooves on the angle adjusting plate, and the diameter of each threaded hole is smaller than the width of the arc-shaped bolt groove.
As a preferable scheme of the present invention, both ends of the arc-shaped bolt groove on the angle adjustment plate are of a semicircular structure, centers of circles of both ends of the arc-shaped bolt groove are respectively overlapped with any two adjacent threaded holes on the regular hexagonal connection block, and at least four press-fit bolts for screwing into the threaded holes are installed on the angle adjustment plate through the four arc-shaped bolt grooves at any angle.
As a preferable scheme of the invention, the diameter of the angle adjusting disc is smaller than the width of any two opposite sides of the regular hexagonal connecting block.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the engine working mode online identification system, the intensity of shock waves of an isolation section in a combustion chamber is respectively collected through a force sensor module and an optical fiber sensor module, optical signals of spontaneous radiation in the combustion chamber are received, the collected pressure and the optical signals are respectively converted into corresponding voltage signals, and the voltage signals are subjected to operation processing through a calculation processing module to determine the intensity of the shock waves of the isolation section, the flame propagation speed and the flame state;
(2) The force sensor and the optical fiber sensors are integrally arranged on the substrate to form an integrated structure with a compact structure, so that the interference and the damage to the wall surface of a combustion chamber and the interference on the characteristics of an internal flow field such as shock waves are reduced, and the influence on an engine under the condition of high flow velocity of the internal flow field is reduced;
(3) According to the invention, the inner wall leveling column integrated with the sensor group is designed to be level with the inner wall of the combustion chamber, and the end surface of the inner wall leveling column is designed to be in the structure with the same curvature as that of the inner wall of the combustion chamber, so that the end surface of the inner wall leveling column is consistent with the curvature of the inner wall of the combustion chamber by adjusting the angle of the integrated end after the base body is installed, and the influence of the installation hole formed in the inner wall of the combustion chamber on the test result is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 provides an overall schematic structure diagram for the embodiment of the present invention.
Fig. 2 is a schematic diagram of a distribution of sensor groups according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an integrated terminal according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an angle adjustment plate according to an embodiment of the present invention.
Fig. 5 is a schematic end face structure diagram of a regular hexagonal connection block according to an embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
101-a substrate; 102-an integration terminal; 103-sensor group; 104-a calculation processing module;
1011-a threaded cylinder; 1012-regular hexagonal connecting block; 1021-a sensor mounting post; 1022-inner wall flush column; 1023-an angle adjustment disc;
1031-force sensor; 1032-fiber optic sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 to 5, the present invention provides an engine operating mode online identification system, including:
the engine combustion chamber comprises a base body 101, a valve body and a valve body, wherein the base body 101 is arranged on the inner wall of the engine combustion chamber, and the base body 101 is provided with an integration end 102 positioned on one side of the inner wall of the engine combustion chamber;
the sensor group 103 is integrally arranged at the integration end 102 of the base body 101, and the sensor group 103 is used for collecting experimental data in a combustion chamber of the engine;
the calculation processing module 104 is in communication connection with the sensor group 103, and the calculation processing module 104 is used for receiving the experimental data collected by the sensor group 103 and analyzing and processing the experimental data; wherein,
the end face of the integration end 102 is flush with the surface of the inner wall.
The engine combustion chamber is provided with a base body mounting hole communicated with the inner wall of the engine combustion chamber, and the base body mounting hole consists of an inner thread section on the outer side and a through hole section on the inner side;
The sensor group 103 comprises force sensors 1031, at least two optical fiber sensors 1032 are arranged according to the pressure collecting point characteristics, the force sensors 1031 are installed along the axial center of the integration end 102, and the optical fiber sensors 1032 are distributed in a matrix mode around the axial center of the integration end 102.
The three distribution patterns of the sensor group 103 include:
the first form: a force sensor 1031 and two optical fiber sensors 1032 are included, and the two optical fiber sensors 1032 are symmetrically distributed about the central axis of the force sensor 1031;
the second form: the force sensor comprises a force sensor 1031 and eight optical fiber sensors 1032, and the eight optical fiber sensors 1032 are divided into four groups in a pairwise corresponding manner and are respectively arranged on the horizontal and longitudinal central axes of the force sensor 1031;
the third form: force sensors 1031 and eight optical fiber sensors 1032 are included, and the eight optical fiber sensors 1032 are symmetrically distributed around the outer circumference center of the force sensors 1031.
The calculation processing module 104 is arranged in a central control device of the combustion chamber, and the calculation processing module 104 is respectively in communication connection with the force sensor 1031 and the plurality of optical fiber sensors 1032 through external data lines;
the force sensor 1031 is used for collecting the shock wave intensity of the isolation section in the combustion chamber, converting the pressure signal into a voltage signal and transmitting the voltage signal to the calculation processing module 104;
the optical fiber sensors 1032 are configured to receive optical signals of spontaneous radiation in the combustion chamber, obtain optical signals through photomultiplier amplification and mode-to-electrical conversion, perform wavelength selective amplification processing on the optical signals, convert the optical signals into corresponding voltage signals, convert the voltage signals into voltage signals, and transmit the voltage signals to the calculation processing module 104.
According to the engine working mode online identification system, the intensity of shock waves of an isolation section in a combustion chamber is respectively collected through a force sensor module and an optical fiber sensor module, optical signals of spontaneous radiation in the combustion chamber are received, the collected pressure and the optical signals are respectively converted into corresponding voltage signals, and the voltage signals are subjected to operation processing through a calculation processing module to determine the intensity of the shock waves of the isolation section, the flame propagation speed and the flame state;
therefore, the coupling real-time online measurement of the multiple physical quantities of the shock wave intensity of the isolation section, the flame propagation speed and the flame combustion state (single distribution of equivalence ratio, flame front position, variation of heat release rate and the like) in the combustion chamber in a limited space can be realized;
the integrated end 102 comprises a sensor mounting column 1021 rotatably connected with a through hole on the inner side of the base body 101, and an inner wall flush column 1022 and an angle adjusting disc 1023 which are arranged at the front end and the rear end of the sensor mounting column 1021;
a large mounting hole for mounting the force sensor 1031 is formed in the axial central axis of the sensor mounting column 1021, and small mounting holes for mounting a corresponding number of optical fiber sensors 1032 are formed in the sensor mounting column 1021 around the periphery of the large mounting hole;
the inner wall leveling column 1022 is used for filling a through hole section on the inner side of the base body mounting hole and leveling with the inner wall, a detection hole which is matched with the communication of a large mounting hole and a plurality of small mounting holes in the sensor mounting column 1021 is formed in the inner wall leveling column 1022, and detection structures of the force sensor 1031 and the plurality of optical fiber sensors 1032 penetrate through the detection hole to detect the interior of the engine combustion chamber;
the angle adjustment dish 1023 is laminated with the terminal surface of regular hexagonal connecting block 1012, and the inside of angle adjustment dish 1023 is equipped with four arc bolt grooves along its axial distribution.
The front end face of the inner wall flush column 1022 is the same as the curvature of the inner wall of the combustion chamber, and the angle adjusting disc 1023 rotates to adjust the orientation of the curved surface through the sensor mounting column 1021 together with the inner wall flush column 1022.
Threaded holes are formed in the end faces of the inner wall flush columns 1022, close to the six corners, and the six threaded holes coincide with any one of the arc-shaped bolt grooves in the angle adjusting plate 1023, and the diameter of each threaded hole is smaller than the width of each arc-shaped bolt groove.
The diameter of the angle adjusting disc 1023 is smaller than the width of any two opposite sides of the regular hexagonal connecting block 1012.
Through installing force transducer and a plurality of fiber sensor integration on the base member and forming compact structure's integral type structure, reduced the interference and the destruction to the combustion chamber wall and to the interference that interior flow field characteristics such as shock wave produced, especially to the great influence that the engine caused under the high velocity of flow circumstances including, also avoided having specific orientation camber to novel combustion chamber wall, force transducer and fiber sensor trompil alone, arrange respectively and can't guarantee the measurement repeatability problem.
When the installation, twist the base member mounting hole of seting up on the combustion chamber earlier with base member 101 to use the regular hexagon connecting block 1012 of spanner cooperation base member 101 to link and screw up a screw thread section of thick bamboo 1011, whether the terminal surface camber is towards unanimous parallel and level with the camber of inner wall before observing the inner wall parallel and level 1022 of integrated end 102 this moment, if the orientation is inconsistent then can lead to producing concave-convex structure on the combustion chamber inner wall, influence experimental progress.
At this moment, through angle adjustment dish 1023 of rotating the base member 101 the back, through angle adjustment dish 1023 with sensor erection column 1021 and inner wall parallel and level post 1022 synchronous rotation, the preceding terminal surface curvature of up to inner wall parallel and level post 1022 is unanimous and the parallel and level with the curvature orientation of inner wall, the position of angle adjustment dish 1023 can be fixed this moment, pass the arc wall on angle adjustment dish 1023 through using the bolt and twist in the screwed hole that the positive hexagonal connecting block 1012 back set up, because contained angle between six screwed holes that positive hexagonal connecting block 1021 back set up is 60, and the arc wall length on the angle adjustment dish 1023 just covers two adjacent screwed holes, consequently four bolts can be twisted in the back of angle adjustment dish 1023 at least, with this fixed pressfitting in the back of positive hexagonal connecting block 1012 with angle adjustment dish 1023, the orientation of taking fixed inner wall parallel and level post 1022 terminal surface.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made to the disclosure by those skilled in the art within the spirit and scope of the disclosure, and such modifications and equivalents should also be considered as falling within the scope of the disclosure.
Claims (7)
1. An engine working mode online identification system is characterized by comprising:
the engine combustion chamber comprises a base body (101) arranged on the inner wall of an engine combustion chamber, wherein the base body (101) is provided with an integrated end (102) positioned on one side of the inner wall of the engine combustion chamber;
the sensor group (103) is integrally arranged at the integration end (102) of the base body (101), and the sensor group (103) is used for collecting experimental data in the engine combustion chamber;
the calculation processing module (104) is in communication connection with the sensor group (103), and the calculation processing module (104) is used for receiving experimental data collected by the sensor group (103) and analyzing and processing the experimental data; wherein,
the end surface of the integrated end (102) is flush with the surface of the inner wall;
the engine combustion chamber is provided with a substrate mounting hole communicated with the inner wall of the engine combustion chamber, and the substrate mounting hole consists of an inner thread section on the outer side and a through hole section on the inner side;
the base body (101) comprises a threaded cylinder (1011) matched with the threaded section in the base body mounting hole for connection, and a regular hexagonal connecting block (1012) integrally formed with the threaded cylinder (1011), the regular hexagonal connecting block (1012) is screwed into the base body mounting hole through the threaded cylinder (1011) to be connected with the engine combustion chamber, and the inner center positions of the threaded cylinder (1011) and the regular hexagonal connecting block (1012) are provided with through holes for mounting the integrated end (102);
the integrated end (102) comprises a sensor mounting column (1021) rotatably connected with a through hole on the inner side of the base body (101), inner wall flush columns (1022) arranged at the front end and the rear end of the sensor mounting column (1021), and an angle adjusting disc (1023);
a large mounting hole for mounting a force sensor (1031) is formed in the axial central axis of the sensor mounting column (1021), and small mounting holes for mounting a corresponding number of optical fiber sensors (1032) are formed in the sensor mounting column (1021) around the periphery of the large mounting hole;
the inner wall leveling column (1022) is used for filling a through hole section on the inner side of the base body mounting hole and leveling with the inner wall, a detection hole which is matched with the large mounting hole and a plurality of small mounting holes in the sensor mounting column (1021) to be communicated is formed in the inner wall leveling column (1022), and detection structures of the force sensor (1031) and the optical fiber sensors (1032) penetrate through the detection hole to detect the interior of the engine combustion chamber;
the angle adjusting disc (1023) is attached to the end face of the regular hexagonal connecting block (1012), and four arc-shaped bolt grooves distributed along the axial direction of the angle adjusting disc (1023) are formed in the angle adjusting disc (1023);
the front end face of the inner wall flush column (1022) is the same as the curvature of the inner wall of the combustion chamber, and the angle adjusting disc (1023) is connected with the inner wall flush column (1022) through the sensor mounting column (1021) to rotate and adjust the orientation of the curved surface.
2. The system for on-line identification of the working mode of the engine according to claim 1, wherein: the sensor group (103) comprises force sensors (1031), at least two optical fiber sensors (1032) are arranged according to pressure collection point characteristics, the force sensors (1031) are installed along the axial center position of the integration end (102), and the optical fiber sensors (1032) are distributed around the axial center of the integration end (102) in a matrix mode.
3. The system for on-line identification of engine working modes according to claim 2, characterized in that the three distribution forms of the sensor group (103) comprise:
the first form: comprises the force sensor (1031) and two optical fiber sensors (1032), and the two optical fiber sensors (1032) are symmetrically distributed about the central axis of the force sensor (1031);
the second form: the force sensor comprises the force sensors (1031) and eight optical fiber sensors (1032), and the eight optical fiber sensors (1032) are correspondingly divided into four groups in pairs and are respectively arranged on the horizontal and longitudinal central axes of the force sensors (1031);
the third form: comprises said force sensors (1031) and eight said optical fiber sensors (1032), and eight said optical fiber sensors (1032) are symmetrically distributed around a peripheral center of said force sensors (1031).
4. The system for on-line identification of the working mode of the engine according to claim 3, wherein: the computing processing module (104) is arranged in a central control device of the combustion chamber, and the computing processing module (104) is respectively in communication connection with the force sensor (1031) and the optical fiber sensors (1032) through external data lines;
the force sensor (1031) is used for collecting the shock wave intensity of the isolation section in the combustion chamber, converting the pressure signal into a voltage signal and transmitting the voltage signal to the computing and processing module (104);
the optical fiber sensors (1032) are used for receiving optical signals of spontaneous radiation in the combustion chamber, performing photomultiplier multiplication and mode-to-electricity conversion to obtain optical signals, performing wavelength selective amplification processing on the optical signals to convert the optical signals into corresponding voltage signals, converting the voltage signals into voltage signals and transmitting the voltage signals to the computing processing module (104).
5. The system for on-line identification of the working mode of the engine according to claim 1, wherein: the end face of the regular hexagonal connecting block (1012) is provided with threaded holes at positions close to six corners, the six threaded holes coincide with any arc-shaped bolt groove in the angle adjusting disc (1023), and the diameter of each threaded hole is smaller than the width of the arc-shaped bolt groove.
6. The system for on-line identification of the working mode of the engine according to claim 5, wherein: the both ends in arc bolt groove all are semi-circular structure on angle adjustment dish (1023), and the both ends centre of a circle in arc bolt groove respectively with two arbitrary adjacent on regular hexagonal connecting block (1012) the screw hole coincidence, angle adjustment dish (1023) all through four at arbitrary angle arc bolt groove installation is used for twisting at least four the inside pressfitting bolt of screw hole.
7. The system for on-line identification of the working mode of the engine according to claim 6, wherein: the diameter of the angle adjusting disc (1023) is smaller than the width of any two opposite edges of the regular hexagonal connecting block (1012).
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| CN117464614B (en) * | 2023-12-28 | 2024-04-02 | 杭州华翊科技有限公司 | Tool for separating compressor and combustion chamber shell of turbojet engine |
| CN117723118A (en) * | 2024-02-18 | 2024-03-19 | 中国科学技术大学 | Shock wave stabilizing structure, shock wave tube and shock wave detection method and device |
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| AT3845U1 (en) * | 1999-09-28 | 2000-08-25 | Avl List Gmbh | OPTOELECTRONIC MEASURING DEVICE |
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