CN111238822A - Combustion chamber dynamic pressure on-line monitoring system - Google Patents
Combustion chamber dynamic pressure on-line monitoring system Download PDFInfo
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- CN111238822A CN111238822A CN201811447707.1A CN201811447707A CN111238822A CN 111238822 A CN111238822 A CN 111238822A CN 201811447707 A CN201811447707 A CN 201811447707A CN 111238822 A CN111238822 A CN 111238822A
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- combustion chamber
- pressure
- monitoring
- light beam
- optical sensor
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
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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
- G01M15/02—Details or accessories of testing apparatus
Abstract
The application provides a combustion chamber dynamic pressure on-line monitoring system, includes: the pressure membrane, the optical sensor and the monitoring pipeline; one end of the monitoring pipeline is coupled with the combustion chamber, the pressure membrane is arranged at one end, close to the combustion chamber, in the monitoring pipeline, the edge of the pressure membrane is in seamless fit with the inner wall of the monitoring pipeline, and the optical sensor is arranged at the other end of the monitoring pipeline; the optical sensor is used for emitting a first light beam to the pressure film, receiving a second light beam reflected by the pressure film and determining pressure change in the combustion chamber according to the change of the optical parameter of the second light beam and/or the change of the optical parameter between the first light beam and the second light beam. The application provides a combustion chamber dynamic pressure on-line monitoring system, can tolerate high temperature and great temperature gradient, have that the shock resistance is good, the reliability is high, long service life, maintenance cost low grade.
Description
Technical Field
The application relates to the technical field of engines, in particular to a dynamic pressure online monitoring system of a combustion chamber.
Background
The combustor is a device in which fuel or propellant is burned to generate high temperature combustion gas, and is an important component of a gas turbine engine, a ramjet engine, and an aircraft engine. The pressure change of the combustion chamber has close relation with the combustion efficiency, the operation state and the service life of the engine, so that if the pressure in the combustion chamber can be monitored, the combustion efficiency of the engine can be improved, the operation state of the engine can be mastered, the service life of the engine can be further prolonged, and the maintenance cost of the engine can be reduced.
At present, the pressure in the combustion chamber can be monitored by an embedded instrument built in the combustion chamber, but the temperature in the combustion chamber is as high as 1300 degrees, the embedded instrument is easily damaged by high-temperature and high-pressure combustion gas, so that the use reliability is reduced, the service life is shortened, and when the embedded instrument fails, the engine needs to be stopped, and thus the operation needs to be interrupted so as to be disassembled or replaced.
Therefore, a combustion chamber pressure detection system that can withstand a high-temperature and high-pressure environment and has high reliability is required.
Disclosure of Invention
The application provides a combustor dynamic pressure on-line monitoring system to solve the problem that the prior monitoring technology can not adapt to the high-temperature and strong-vibration environment of a combustor. The technical scheme adopted by the application is as follows:
the application provides a combustion chamber dynamic pressure on-line monitoring system, includes: the pressure membrane, the optical sensor and the monitoring pipeline;
one end of the monitoring pipeline is coupled with the combustion chamber, the pressure membrane is arranged at one end, close to the combustion chamber, in the monitoring pipeline, the edge of the pressure membrane is in seamless fit with the inner wall of the monitoring pipeline, and the optical sensor is arranged at the other end of the monitoring pipeline;
the optical sensor is used for emitting a first light beam to the pressure film, receiving a second light beam reflected by the pressure film and determining pressure change in the combustion chamber according to the change of the optical parameter of the second light beam and/or the change of the optical parameter between the first light beam and the second light beam.
Optionally, the optical parameter comprises at least one of the following physical quantities: light intensity, wavelength, phase, polarization, angular difference of the first and second light beams, frequency.
Optionally, the monitoring device further comprises a cooling device for cooling the monitoring pipeline.
Optionally, the optical sensor is hermetically coupled to the other end of the monitoring pipe, so that the pressure membrane and the sensor form a closed space in the monitoring pipe.
Optionally, one end of the monitoring pipe is coupled with an access opening of the combustion chamber or a through hole formed in the combustion chamber.
Optionally, the pressure membrane is made of an alloy material, a composite material, a carbon fiber material, a carbon nano material, an organic material or an inorganic material.
Compared with the prior art, the online monitoring system for the dynamic pressure of the combustion chamber provided by the embodiment of the application has the following beneficial effects: because the pressure membrane that is close to the combustion chamber is not accurate electron device, consequently the pressure membrane can tolerate the high temperature and the great difference in temperature of combustion chamber, and the vibration resistance is high, and the optical sensor who is used for measuring lays in the one end that the combustion chamber was kept away from to the monitoring pipe, and this section monitoring pipe can play isolation, cooling, cushioning effect, avoids optical sensor to receive the influence of high temperature, vibration, guarantees monitoring system's reliability, increase of service life. In addition, the optical sensor has high measurement precision, can monitor the fine deformation of the pressure membrane, and improves the sensitivity and precision of the monitoring system. In the whole monitoring system, only the pressure membrane is in the high temperature environment, and only the pressure membrane easily takes place the loss, and after the loss takes place for the pressure membrane, only need change the pressure membrane, and other devices in the system still can normal use, and this has reduced the maintenance cost of system undoubtedly.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.
FIG. 1 is a schematic structural diagram of an online dynamic pressure monitoring system for a combustor according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an online monitoring system for dynamic pressure of a combustion chamber according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the embodiment of the present application provides an online monitoring system for dynamic pressure of a combustion chamber, which includes a pressure membrane 1, an optical sensor 2 and a monitoring pipe 3.
One end of the monitoring pipe 3 is coupled to the combustion chamber 4, for example, one end of the monitoring pipe is coupled to a through hole 5 formed on the combustion chamber, and the through hole 5 may be an original access hole 5 of the combustion chamber or a through hole specially formed on the combustion chamber 4 for monitoring the pressure. The through holes arranged on the combustion chamber are small, so that the temperature in the combustion chamber 4 cannot be influenced.
The pressure membrane 1 is arranged at one end close to the combustion chamber 4 in the monitoring pipeline 3, namely one end close to the through hole 5, and the edge of the pressure membrane 1 is in seamless fit with the inner wall of the monitoring pipeline 3. The optical sensor 2 is arranged at the other end of the monitoring pipeline 3, and the optical sensor 2 is coupled with the other end of the monitoring pipeline 3 in a sealing mode, so that the pressure membrane and the sensor form a closed space 7 in the monitoring pipeline, and therefore the pressure intensity of one side, close to the combustion chamber 4, of the pressure membrane 1 can be maintained at a stable value, and the pressure intensity change of one side, close to the combustion chamber 4, of the pressure membrane 1 can be detected by the optical sensor 2. The monitoring conduit 3 is long enough to ensure that the temperature at the optical sensor 2 is at a low level.
The pressure membrane 1 is made of a material with high temperature resistance, vibration resistance, good ductility and strong mechanical fatigue resistance, for example, the material for making the pressure membrane can be an alloy material, a composite material, a carbon fiber material, a carbon nano material, an organic material or an inorganic material.
The optical sensor 2 comprises a transmitting module, a receiving module and a data processing module. The emitting module can emit a light beam, which may be a laser, and for convenience of description, the light beam emitted by the emitting module is referred to as a first light beam 101. The transmitting module can be a laser generator, the receiving module can be a photoelectric sensor, and the data processing module can be a microprocessor, such as a CPU, an FPGA, a singlechip and the like.
The emitting module emits a first light beam 101 to the pressure membrane 1, the first light beam 101 is reflected on the surface of the pressure membrane 1, the reflected light beam is called a second light beam 102, and the second light beam 102 is received by the receiving module and then outputs a corresponding electric signal. The data processing module obtains various optical parameters of the second light beam 102 according to the electric signal output by the receiving module, and determines the pressure change in the combustion chamber 4 according to the change of the optical parameters of the second light beam 102, or determines the pressure change in the combustion chamber 4 according to the change of the optical parameters between the first light beam 101 and the second light beam 102.
Pressure in the combustion chamber 4 changes, so that pressure difference between two side surfaces of the pressure film 1 changes, and deformation of the pressure film 1 is caused, once the pressure film 1 deforms, optical parameters such as a light path and light intensity of the second light beam 102 reflected by the pressure film 1 change, and therefore the pressure change in the combustion chamber 4 can be determined by monitoring the change of reflected light of the pressure film 1.
Because the pressure membrane 1 that is close to combustion chamber 4 is not accurate electron device, consequently pressure membrane 1 can tolerate the high temperature and the great difference in temperature of combustion chamber 4, and the vibration resistance is high, and the optical sensor 2 that is used for measuring is laid in the one end that monitoring pipe 3 kept away from combustion chamber 4, this section monitoring pipe 3 can play isolation, cooling, cushioning effect, avoids optical sensor 2 to receive the influence of high temperature, vibration, guarantees monitoring system's reliability, increase of service life. In addition, the optical sensor 2 has high measurement precision, can monitor the fine deformation of the pressure membrane 1, and improves the sensitivity and precision of the monitoring system.
In the whole monitoring system, only the pressure membrane 1 is in a high-temperature environment, only the pressure membrane 1 is easy to lose, and after the pressure membrane 1 loses, only the pressure membrane 1 needs to be replaced, and other devices in the system can still be normally used, so that the maintenance cost of the system is undoubtedly reduced.
Wherein the optical parameter comprises at least one of the following physical quantities: light intensity, wavelength, phase, polarization, angular difference of the first light beam 101 and the second light beam 102, frequency.
For example, when a decrease in the intensity of the second light beam 102 is detected, this may indicate that the pressure in the combustion chamber is increasing, or a change in the pressure in the combustion chamber 4 may be determined from the difference in the intensity of the first light beam 101 and the second light beam 102. When a large change in the wavelength or frequency of the second beam 102 is detected per unit time, a large pressure in the combustion chamber is indicated. The phase of the second beam 102 changes, indicating that the pressure in the combustion chamber has changed, and the relationship between the specific phase and the pressure can be determined by experiment in advance. The difference in the angles of the first beam and the second beam becomes large, indicating that the pressure becomes large.
In specific implementation, pressure variation in the combustion chamber 4 of the pressure membrane 1 vibrates, so that the light wave reflected by the pressure membrane 1 generates doppler effect, and the pressure on the other side of the pressure membrane 1 can be accurately monitored by monitoring the frequency variation of the second light beam 102 reflected by the pressure membrane 1.
Optionally, the online monitoring system for the dynamic pressure of the combustion chamber further includes a cooling device 6, and the cooling device 6 is used for cooling the monitoring pipe 3. The cooling device can be realized by air cooling, water cooling or TEC (thermoelectric cooler) or the like. As shown in fig. 2, the cooling device 6 is an air cooling device, and the cooling device 6 may be disposed at any position capable of blowing to the detection duct, for example, as shown in fig. 2, the cold air flow 201 may be transversely sent to the monitoring duct 3, or the cold air flow may be sent to the outer wall of the monitoring duct 3 along the axial direction of the monitoring duct 3, so as to cool the monitoring duct 3. Therefore, the temperature of the position where the pressure membrane 1 is located can be reduced, the service life of the pressure membrane 1 is prolonged, and meanwhile, the position where the optical sensor 2 is located is maintained at a lower temperature, and the optical sensor 2 is protected.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (6)
1. An online monitoring system for dynamic pressure of a combustion chamber is characterized by comprising: the pressure membrane, the optical sensor and the monitoring pipeline;
one end of the monitoring pipeline is coupled with the combustion chamber, the pressure membrane is arranged at one end, close to the combustion chamber, in the monitoring pipeline, the edge of the pressure membrane is in seamless fit with the inner wall of the monitoring pipeline, and the optical sensor is arranged at the other end of the monitoring pipeline;
the optical sensor is used for emitting a first light beam to the pressure film, receiving a second light beam reflected by the pressure film and determining pressure change in the combustion chamber according to the change of the optical parameter of the second light beam and/or the change of the optical parameter between the first light beam and the second light beam.
2. The system according to claim 1, characterized in that the optical parameters comprise at least one of the following physical quantities: light intensity, wavelength, phase, polarization, angular difference of the first and second light beams, frequency.
3. The system of claim 1, further comprising a cooling device for cooling the monitoring conduit.
4. The system of claim 1, wherein the optical sensor is sealingly coupled to the other end of the monitoring conduit such that the pressure membrane and the sensor form a sealed space within the monitoring conduit.
5. The system of claim 1, wherein one end of the monitoring conduit is coupled to an access port of the combustion chamber or a through-hole formed in the combustion chamber.
6. The system according to any one of claims 1 to 5, wherein the pressure membrane is made of an alloy material, a composite material, a carbon fiber material, a carbon nanomaterial, an organic material, or an inorganic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447707.1A CN111238822A (en) | 2018-11-29 | 2018-11-29 | Combustion chamber dynamic pressure on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447707.1A CN111238822A (en) | 2018-11-29 | 2018-11-29 | Combustion chamber dynamic pressure on-line monitoring system |
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| Publication Number | Publication Date |
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| CN111238822A true CN111238822A (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811447707.1A Pending CN111238822A (en) | 2018-11-29 | 2018-11-29 | Combustion chamber dynamic pressure on-line monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896591A (en) * | 2020-08-04 | 2020-11-06 | 北京致感致联科技有限公司 | Self-calibration gas sensor device and calibration method and system thereof |
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| US5385053A (en) * | 1991-08-21 | 1995-01-31 | Fiberoptic Sensor Technologies | Fiber optic pressure sensor systems |
| US20040123598A1 (en) * | 2002-12-31 | 2004-07-01 | General Electric Company | High temperature combustor wall for temperature reduction by optical reflection and process for manufacturing |
| CN101600905A (en) * | 2007-01-02 | 2009-12-09 | 西门子公司 | The device for pressure measurement of gas turbine, burner and fuel supply |
| CN102954846A (en) * | 2011-08-24 | 2013-03-06 | 通用电气公司 | Systems and methods for making temperature and pressure measurements utilizing a tunable laser diode |
| CN105051512A (en) * | 2013-01-31 | 2015-11-11 | 镭射点有限公司 | Optical sensor for contactless pressure measurements |
| CN105953943A (en) * | 2016-07-18 | 2016-09-21 | 武汉理工大学 | Optical fiber sensing measurement system for safety monitoring of closed storage device |
| CN106500997A (en) * | 2016-11-09 | 2017-03-15 | 哈尔滨工程大学 | A kind of internal combustion engine in-cylinder pressure and temperature testing method and device based on semiconductor laser with tunable spectral absorption method |
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2018
- 2018-11-29 CN CN201811447707.1A patent/CN111238822A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385053A (en) * | 1991-08-21 | 1995-01-31 | Fiberoptic Sensor Technologies | Fiber optic pressure sensor systems |
| US20040123598A1 (en) * | 2002-12-31 | 2004-07-01 | General Electric Company | High temperature combustor wall for temperature reduction by optical reflection and process for manufacturing |
| CN101600905A (en) * | 2007-01-02 | 2009-12-09 | 西门子公司 | The device for pressure measurement of gas turbine, burner and fuel supply |
| CN102954846A (en) * | 2011-08-24 | 2013-03-06 | 通用电气公司 | Systems and methods for making temperature and pressure measurements utilizing a tunable laser diode |
| CN105051512A (en) * | 2013-01-31 | 2015-11-11 | 镭射点有限公司 | Optical sensor for contactless pressure measurements |
| CN105953943A (en) * | 2016-07-18 | 2016-09-21 | 武汉理工大学 | Optical fiber sensing measurement system for safety monitoring of closed storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896591A (en) * | 2020-08-04 | 2020-11-06 | 北京致感致联科技有限公司 | Self-calibration gas sensor device and calibration method and system thereof |
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