CN108414501B - Measurement system and heat release control method - Google Patents
Measurement system and heat release control method Download PDFInfo
- Publication number
- CN108414501B CN108414501B CN201810130998.5A CN201810130998A CN108414501B CN 108414501 B CN108414501 B CN 108414501B CN 201810130998 A CN201810130998 A CN 201810130998A CN 108414501 B CN108414501 B CN 108414501B
- Authority
- CN
- China
- Prior art keywords
- signal
- heat release
- release rate
- module
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
Landscapes
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Testing Of Engines (AREA)
Abstract
The embodiment of the invention provides a measuring system and a heat release control method, wherein the measuring system comprises: the photoelectric conversion module comprises an optical signal acquisition module, a photoelectric multiplication and module-to-electricity conversion module and a signal processing module which are electrically connected in sequence; the optical signal acquisition module is used for receiving optical signals of spontaneous radiation in the combustion chamber through the arrangement of optical fibers and sending the optical signals to the photomultiplier and mode-to-electricity conversion module; the photomultiplier and analog-to-digital conversion module is used for carrying out wavelength selective amplification processing on the received optical signal, converting the optical signal into a voltage signal and sending the voltage signal to the signal processing module; and the signal processing module is used for carrying out operation processing on the received voltage signal to obtain the heat release rate, the equivalence ratio distribution and the flame front position. The method can monitor the position of the front of the continuous combustion flame after successful ignition, the local equivalence ratio distribution change after successful ignition and the heat release rate change after successful ignition.
Description
Technical Field
The embodiment of the invention relates to the field of measurement and control of combustion chambers of aerospace power propulsion devices, in particular to a measurement system and a heat release control method.
Background
The time scale of combustion flow and chemical reaction processes in aerospace power propulsion devices, such as scramjet engines, is very short, and the applicable sensors and measurement methods need to have fast time response characteristics, and if invasive measurement is used, the flow characteristics are changed, so that a non-invasive optical measurement method with fast response needs to be developed. Non-invasive optical measurements usually require an optical quartz window on the engine, however, the refractive index of the window will change under high temperature and high pressure conditions, which causes deviation of the measurement result, and local thermal stress can cause window damage and is accompanied by technical problems of high temperature and high pressure sealing.
Therefore, under the severe high-temperature and high-pressure environment of the combustion chamber of the aerospace power propulsion device, the traditional measurement method is not easy to arrange in the combustion chamber and realizes effective and accurate measurement.
Disclosure of Invention
The embodiment of the invention provides a measuring system and a heat release control method, which can effectively and accurately perform online measurement on spontaneous spectrum of flame of an engine combustion chamber under a severe high-temperature and high-pressure environment.
In a first aspect, an embodiment of the present invention provides a measurement system, which is applied to measurement of spontaneous emission spectrum of flame in a combustion chamber of an aerospace power propulsion device, and includes:
the photoelectric conversion module comprises an optical signal acquisition module, a photoelectric multiplication and module-to-electricity conversion module and a signal processing module which are electrically connected in sequence;
the optical signal acquisition module is used for receiving optical signals of spontaneous radiation in the combustion chamber through the arrangement of optical fibers and sending the optical signals to the photomultiplier and mode-to-electricity conversion module;
the photomultiplier and analog-to-digital conversion module is used for carrying out wavelength selective amplification processing on the received optical signal, converting the optical signal into a voltage signal and sending the voltage signal to the signal processing module;
and the signal processing module is used for carrying out operation processing on the received voltage signal to obtain the heat release rate, the equivalence ratio distribution and the flame front position.
In one possible embodiment, the optical fiber arrangement of the optical signal detection module is integrated into a metal block or an ignition device.
In one possible embodiment, the fiber front section is filled with a small size sapphire or quartz window.
In one possible embodiment, the optical fiber is arranged in a manner including at least one of:
the 8 channels which penetrate along the axial direction are annularly arranged or arranged in a 9-channel matrix.
In one possible embodiment, the heat release rate is determined by:
the wavelength of the flame signal detected by the 8-channel annularly-distributed optical fiber or the 9-channel matrix-distributed optical fiber is selected, and the local heat release rate of the corresponding positions of the 8 channels and the 9 channels is represented by using, but not limited to, a CH signal waveband.
In one possible embodiment, the equivalence ratio distribution is determined by:
the flame signals detected by the 8-channel annularly-distributed optical fibers or the 9-channel matrix-distributed optical fibers are subjected to wavelength selection, and are subjected to light splitting, and the spontaneous emission optical signals in the signal bands of C2 and CH are used for representing the local equivalence ratio of the corresponding positions of the 8 channels and the 9 channels.
In one possible embodiment, the flame front position is determined by:
and the flame white light signal detected by the 8-channel annularly-distributed optical fiber or the 9-channel matrix-distributed optical fiber represents the position of the flame front.
In a second aspect, an embodiment of the present invention provides a heat release control method, applied to control a flame in a combustion chamber of an aerospace power propulsion device, including:
receiving a heat release rate signal;
judging whether the heat release rate corresponding to the current heat release signal is greater than a set threshold value or not according to the heat release signal;
and if the heat release rate corresponding to the current heat release signal is larger than a set threshold value, adjusting fuel supply of the engine combustion chamber so that the heat release rate corresponding to the current heat release signal is not larger than the set threshold value.
The embodiment of the invention provides a measuring system and a heat release control method, wherein the measuring system comprises: the photoelectric conversion module comprises an optical signal acquisition module, a photoelectric multiplication and module-to-electricity conversion module and a signal processing module which are electrically connected in sequence; the optical signal acquisition module is used for receiving optical signals of spontaneous radiation in the combustion chamber through the arrangement of optical fibers and sending the optical signals to the photomultiplier and mode-to-electricity conversion module; the photomultiplier and analog-to-digital conversion module is used for carrying out wavelength selective amplification processing on the received optical signal, converting the optical signal into a voltage signal and sending the voltage signal to the signal processing module; and the signal processing module is used for carrying out operation processing on the received voltage signal to obtain the heat release rate, the equivalence ratio distribution and the flame front position. The method can monitor the position of the front of the continuous combustion flame after successful ignition, the local equivalence ratio distribution change after successful ignition and the heat release rate change after successful ignition. By receiving a heat release rate signal; judging whether the heat release rate corresponding to the current heat release signal is greater than a set threshold value or not according to the heat release signal; if the heat release rate corresponding to the current heat release signal is larger than a set threshold value, adjusting fuel supply of the engine combustion chamber so that the heat release rate corresponding to the current heat release signal is not larger than the set threshold value, and effectively controlling combustion in the engine combustion chamber.
Drawings
Fig. 1 is a schematic structural diagram of a measurement system according to an embodiment of the present invention;
fig. 2 is a structural diagram of an optical fiber arrangement mode of an optical signal acquisition module according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for controlling heat release according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the convenience of understanding of the embodiments of the present invention, the following description will be further explained with reference to specific embodiments, which are not to be construed as limiting the embodiments of the present invention.
Fig. 1 is a schematic structural diagram of a measurement system provided in an embodiment of the present invention, and is applied to measurement of spontaneous emission spectrum of flame in a combustion chamber of an aerospace power propulsion device, as shown in fig. 1, the system includes:
the photoelectric conversion device comprises an optical signal acquisition module 101, a photomultiplier and mode-to-electricity conversion module 102 and a signal processing module 103 which are electrically connected in sequence;
the optical signal acquisition module 101 is configured to receive an optical signal that is spontaneously radiated in a combustion chamber through a distributed optical fiber and send the optical signal to the photomultiplier and mode-to-electric conversion module;
the photomultiplier and mode-to-electricity conversion module 102 is configured to perform wavelength selective amplification on the received optical signal, convert the optical signal into a voltage signal, and send the voltage signal to the signal processing module;
the signal processing module 103 is configured to perform operation processing on the received voltage signal to obtain a heat release rate, an equivalence ratio distribution, and a flame front position.
In one possible embodiment, the optical fiber routing of the optical signal acquisition module 101 is integrated into a metal block or an ignition device.
In one possible embodiment, the fiber front section is filled with a sapphire window or a quartz window.
In a possible implementation manner, fig. 2 is a structural diagram of an optical fiber arrangement manner of an optical signal acquisition module provided in an embodiment of the present invention, and referring to fig. 2, the optical fiber arrangement manner at least includes one of the following:
the 8 channels which penetrate along the axial direction are annularly arranged or arranged in a 9-channel matrix.
In one possible embodiment, the heat release rate is determined by:
the wavelength of the flame signal detected by the 8-channel annularly-distributed optical fiber or the 9-channel matrix-distributed optical fiber is selected, and the local heat release rate of the corresponding positions of the 8 channels and the 9 channels is represented by using, but not limited to, a CH signal waveband.
In one possible embodiment, the equivalence ratio distribution is determined by:
the flame signals detected by the 8-channel annularly-distributed optical fibers or the 9-channel matrix-distributed optical fibers are subjected to wavelength selection, and are subjected to light splitting, and the spontaneous emission optical signals in the signal bands of C2 and CH are used for representing the local equivalence ratio of the corresponding positions of the 8 channels and the 9 channels.
In one possible embodiment, the flame front position is determined by:
and the flame white light signal detected by the 8-channel annularly-distributed optical fiber or the 9-channel matrix-distributed optical fiber represents the position of the flame front.
The measurement system provided by the embodiment of the invention comprises: the photoelectric conversion module comprises an optical signal acquisition module, a photoelectric multiplication and module-to-electricity conversion module and a signal processing module which are electrically connected in sequence; the optical signal acquisition module is used for receiving optical signals of spontaneous radiation in the combustion chamber through the arrangement of optical fibers and sending the optical signals to the photomultiplier and mode-to-electricity conversion module; the photomultiplier and analog-to-digital conversion module is used for carrying out wavelength selective amplification processing on the received optical signal, converting the optical signal into a voltage signal and sending the voltage signal to the signal processing module; and the signal processing module is used for carrying out operation processing on the received voltage signal to obtain the heat release rate, the equivalence ratio distribution and the flame front position. The method can monitor the position of the front of the continuous combustion flame after successful ignition, the local equivalence ratio distribution change after successful ignition and the heat release rate change after successful ignition.
Fig. 3 is a schematic flow chart of a heat release control method provided in an embodiment of the present invention, which is applied to measurement of spontaneous emission spectrum of flame in a combustion chamber of an aerospace power propulsion device, and as shown in fig. 3, the method includes:
s301, receiving a heat release rate signal.
S302, judging whether the heat release rate corresponding to the heat release signal is larger than a set threshold value or not according to the heat release signal. If yes, executing S302, otherwise ending the process.
S303, adjusting fuel supply of the engine combustion chamber to enable the heat release rate corresponding to the current heat release signal not to be larger than a set threshold value.
The heat release control method provided by the embodiment of the invention receives the heat release rate signal; judging whether the heat release rate corresponding to the current heat release signal is greater than a set threshold value or not according to the heat release signal; and if the heat release rate corresponding to the current heat release signal is larger than a set threshold value, adjusting fuel supply of the engine combustion chamber so that the heat release rate corresponding to the current heat release signal is not larger than the set threshold value. Combustion in the engine combustion chamber can be effectively controlled.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A measuring system is applied to the measurement of flame spontaneous emission spectrum of a combustion chamber of an aerospace power propulsion device, and is characterized by comprising:
the photoelectric conversion module comprises an optical signal acquisition module, a photoelectric multiplication and module-to-electricity conversion module and a signal processing module which are electrically connected in sequence;
the optical signal acquisition module is used for receiving optical signals of spontaneous radiation in the combustion chamber through the arrangement of optical fibers and sending the optical signals to the photomultiplier and mode-to-electricity conversion module;
the photomultiplier and analog-to-digital conversion module is used for carrying out wavelength selective amplification processing on the received optical signal, converting the optical signal into a voltage signal and sending the voltage signal to the signal processing module;
the signal processing module is used for carrying out operation processing on the received voltage signal to obtain the heat release rate, the equivalence ratio distribution and the flame front position, and the arrangement mode of the optical fibers at least comprises one of the following modes: 8 channels which penetrate through along the axial direction are annularly arranged or are arranged in a 9-channel matrix;
the heat release rate is determined by:
selecting the wavelength of a flame signal detected by 8-channel annularly-distributed optical fibers or 9-channel matrix-distributed optical fibers, and representing the local heat release rate of the corresponding positions of the 8 channels and the 9 channels by using CH signal wave bands;
the equivalence ratio distribution is determined by:
selecting the wavelength of a flame signal detected by an 8-channel annularly-distributed optical fiber or a 9-channel matrix-distributed optical fiber, and using a C2, CH signal waveband spontaneous emission optical signal to represent the local equivalence ratio of corresponding positions of the 8 channel and the 9 channel after light splitting;
the flame front location is determined by:
the flame white light signal detected by the 8-channel annularly-distributed optical fiber or the 9-channel matrix-distributed optical fiber represents the position of a flame front;
based on the measurement system, the continuous combustion flame front position after successful ignition is monitored, the local equivalence ratio distribution change after successful ignition is monitored, and the heat release rate change after successful ignition is monitored.
2. The system of claim 1, wherein the optical fiber routing of the optical signal collection module is integrated into a metal block or an ignition device.
3. The system of claim 1 or 2, wherein the fiber front section is filled with a sapphire window or a quartz window.
4. A method for controlling heat release based on the measurement system of any one of claims 1 to 3, applied to the control of flame in a combustion chamber of an aerospace power propulsion device, comprising:
receiving a heat release rate signal;
judging whether the heat release rate corresponding to the current heat release rate signal is greater than a set threshold value or not according to the heat release rate signal;
and if the heat release rate corresponding to the current heat release rate signal is larger than a set threshold value, adjusting fuel supply of the combustion chamber so that the heat release rate corresponding to the current heat release rate signal is not larger than the set threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810130998.5A CN108414501B (en) | 2018-02-09 | 2018-02-09 | Measurement system and heat release control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810130998.5A CN108414501B (en) | 2018-02-09 | 2018-02-09 | Measurement system and heat release control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108414501A CN108414501A (en) | 2018-08-17 |
| CN108414501B true CN108414501B (en) | 2020-04-24 |
Family
ID=63128098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810130998.5A Active CN108414501B (en) | 2018-02-09 | 2018-02-09 | Measurement system and heat release control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108414501B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111723538B (en) * | 2020-08-21 | 2020-11-13 | 四川大学 | Numerical value judgment method for flameless combustion state in non-premixed combustion process |
| CN113532870B (en) * | 2021-08-11 | 2022-11-08 | 中国科学院力学研究所 | Online identification system for working mode of engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4167334A (en) * | 1978-03-30 | 1979-09-11 | Phillips Petroleum Co. | Flame head for flame photometric detector used in gas chromatography |
| JPH0961358A (en) * | 1995-08-28 | 1997-03-07 | Shimadzu Corp | Flame photometric detector |
| WO2008059598A1 (en) * | 2006-11-17 | 2008-05-22 | Imagineering, Inc. | Reaction analyzing device, recording medium and measuring system |
| US8229655B2 (en) * | 2009-05-19 | 2012-07-24 | GM Global Technology Operations LLC | Fuel injection and combustion fault diagnostics using cylinder pressure sensor |
| CN103559709B (en) * | 2013-11-04 | 2016-06-08 | 北京航空航天大学 | A kind of conditional Level Set Method extracted for PLIF flame front |
| CN105223372B (en) * | 2015-09-22 | 2019-01-25 | 奇瑞汽车股份有限公司 | Engine cylinder endogenous fire flame propagation velocity measuring system and measurement method |
| CN105938101B (en) * | 2016-04-14 | 2020-12-11 | 中国科学院力学研究所 | Imaging system and method for flame three-dimensional reconstruction based on chemiluminescence |
-
2018
- 2018-02-09 CN CN201810130998.5A patent/CN108414501B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108414501A (en) | 2018-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105136178A (en) | Chaos Brillouin optical coherence domain analysis distributed optical fiber sensing device and method | |
| CN108414501B (en) | Measurement system and heat release control method | |
| EP2966426B1 (en) | Optical fiber temperature distribution measuring device | |
| US6729756B2 (en) | Method for calibrating a total-power microwave radiometer for a satellite | |
| KR20060102509A (en) | Fiber optic sensing device and method of making and operating the same | |
| WO2020040019A1 (en) | Optical fiber loss measurement device and optical fiber loss measurement method | |
| JP2001507446A (en) | Distributed strain and temperature sensing system | |
| CN101975594A (en) | Distributed realtime fiber bragg grating wavelength demodulating system and method | |
| CN104864977B (en) | A kind of rocket engine fuel gas temperature method of testing for considering multi-wavelength spectrum radiation | |
| CN106989843A (en) | A kind of distributed multi-channel fiber Raman ultralow temperature measuring system | |
| CN107328478B (en) | A method of light measurement Turbine Blade Temperature Field and emissivity are radiated based on three wave bands | |
| CN114826408A (en) | Optical fiber hydrophone remote all-optical transmission system and design method thereof | |
| CN106505974A (en) | The filtering method and device of Optical fibre sampling signal, optical fiber temperature-measurement method and device | |
| CN111044171B (en) | Method and device for light source parameter self-adaption of distributed optical fiber sensing system | |
| CN109916837B (en) | Sampling time delay distributed multi-point laser methane detection system and method | |
| CN110979729A (en) | Aircraft ground infrared stealth test efficiency evaluation method | |
| CN113945354B (en) | Test method for identifying flow partition characteristics of acceleration section of expansion wind tunnel | |
| CN109813528A (en) | Detection method is lost in optical fiber laser based on optical time domain reflection principle | |
| Li et al. | A performance enhanced Rayleigh Brillouin optical time domain analysis sensing system | |
| CN104697634A (en) | Very high resolution spectral measurement device and method | |
| CN105067146B (en) | Stimulated Raman scattering inhibits apparatus and method and distributed optical fiber sensing system | |
| CN103675796A (en) | Fabry-Perot etalon-calibrating system and method for carrying out optical frequency compensation at cavity length scanning | |
| Zhang et al. | A Cost Effective FBG Sensor System Based on Narrow Band DBR Laser and FPGA Demodulation Technology | |
| CN206019872U (en) | A kind of optical fiber grating temperature-measuring system for broadcasting short-wave transmitter | |
| CN201748929U (en) | Device for demodulating reflecting wavelength of fiber bragg grating through utilizing ASE light source spectrum falling edge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |