CN117330344A - Speed disturbance generating device for flame response test - Google Patents
Speed disturbance generating device for flame response test Download PDFInfo
- Publication number
- CN117330344A CN117330344A CN202311268323.4A CN202311268323A CN117330344A CN 117330344 A CN117330344 A CN 117330344A CN 202311268323 A CN202311268323 A CN 202311268323A CN 117330344 A CN117330344 A CN 117330344A
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- flame
- speed disturbance
- generating device
- vibrating
- response
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- 230000004044 response Effects 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000005316 response function Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a speed disturbance generating device for flame response test, which is of a rigid structure as a whole and comprises a signal generator, a signal amplifier, a piezoelectric device, a vibrating plate, a flame response tester and a vibrating medium, wherein the piezoelectric device is arranged on the vibrating plate, and the vibrating plate and the vibrating medium are positioned in the flame response tester; the signal generator generates harmonic signals, the signal amplifier amplifies the harmonic signals, the piezoelectric device receives the amplified harmonic signals and deforms, and the vibration plate deforms accordingly to cause the vibration medium to generate speed disturbance. Compared with the prior art, the piezoelectric device is adopted to generate speed disturbance, has small volume and light weight, and has better frequency response characteristic; the piezoelectric devices with different numbers can be installed on the same vibrating plate in a modularized mode, and the amplitude and the phase of the speed disturbance can be adjusted in a large range; the sealing device is suitable for high-temperature and high-pressure environments, and is particularly suitable for scenes with high sealing requirements.
Description
Technical Field
The invention relates to flame response testing, in particular to a speed disturbance generating device for flame response testing.
Background
The combustion instability problem caused by thermoacoustic oscillation often occurs in a combustion system, and the combustion instability can generate huge pressure fluctuation and can cause accidents such as backfire and deflagration, thereby bringing great hidden trouble to the safe and stable operation of combustion equipment. Therefore, it is important to analyze the thermoacoustic coupling process of the combustion system, and the response test of the flame to the speed disturbance is an important link for analyzing the combustion instability generation mechanism.
The speed disturbance excitation device in the flame response test generally adopts a cone or diaphragm type moving-coil loudspeaker structure, but the structure generally has the characteristics of small sound pressure amplitude and high temperature and high pressure intolerance, and cannot be suitable for the flame response test under pressure and high temperature scenes. Meanwhile, the traditional loudspeaker is relatively large in structure size, and for some precise combustion devices, the traditional loudspeaker is difficult to install due to the fact that the installation space of the traditional loudspeaker is very limited.
Therefore, developing a disturbance generating device suitable for a flame response test system under high temperature and high pressure conditions is a great difficulty in the current field; meanwhile, based on the requirement of matching with the actual field installation space, how to design a disturbance generating device with small volume and light weight is also a problem to be solved.
Disclosure of Invention
The object of the present invention is to overcome the above-mentioned drawbacks of the prior art by providing a speed disturbance generating device for flame response testing.
The aim of the invention can be achieved by the following technical scheme:
according to one aspect of the present invention, there is provided a speed disturbance generating device for flame response testing, the device being of a generally rigid construction, comprising a signal generator, a signal amplifier, a piezoelectric device, a vibrating plate, a flame response tester and a vibrating medium, the piezoelectric device being mounted on the vibrating plate, the vibrating plate and the vibrating medium being located in the flame response tester; the signal generator generates harmonic signals, the signal amplifier amplifies the harmonic signals, the piezoelectric device receives the amplified harmonic signals and deforms, and the vibrating plate deforms accordingly to cause the vibrating medium to generate speed disturbance in the flame response tester.
As a preferable technical scheme, the piezoelectric device is arranged on one of two sides of the vibration plate, and at least one piezoelectric device is arranged.
As a preferred technical scheme, the flame response tester comprises an air supply pipeline, a flame zone, a flame heat release measuring instrument and a pressure fluctuation measuring instrument.
As the preferable technical scheme, the vibrating plate is arranged at one end of the air supply pipeline, and the vibrating medium is positioned in the air supply pipeline at one end of the vibrating plate.
As an optimal technical scheme, the flame zone is positioned at one end of the air supply pipeline, on which the vibrating plate is not arranged, and the flame heat release measuring instrument is positioned at the periphery of the flame zone.
As an optimal technical scheme, the vibrating plate deforms to enable the vibrating medium in the air supply pipeline to generate speed disturbance.
As a preferred solution, the said speed disturbance is transmitted to the flame zone to generate heat release fluctuations.
As a preferable technical scheme, the flame heat release measuring instrument tests heat release fluctuation; and testing the speed disturbance by the pressure fluctuation measuring instrument to obtain a response function of the flame.
As a preferred technical scheme, the signal generator and the signal amplifier are located outside the flame response tester.
As a preferable technical scheme, the vibrating plate and the flame response tester form a sealing structure.
Compared with the prior art, the invention has the following advantages:
1) Compared with the traditional moving-coil loudspeaker, the piezoelectric device is adopted to generate the speed disturbance, so that the moving-coil loudspeaker has the characteristics of small volume and light weight, and has better frequency response characteristic;
2) The invention can carry out modularized installation, and piezoelectric devices with different numbers can be installed on the same vibrating plate, so as to realize the large-scale adjustment of the amplitude and the phase of the speed disturbance;
3) The invention is applicable to high-temperature and high-pressure environments, and is particularly applicable to scenes with higher sealing requirements.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a velocity disturbance generating device for flame response testing according to the present invention;
the reference numerals in the figures indicate:
1. signal generator 2, signal amplifier 3, piezoelectric device 4, vibration board 5, flame response tester 50, air supply pipe 51, flame zone 510, flame 511, burner 52, flame heat release measuring instrument 53, pressure fluctuation measuring instrument 6, vibration medium.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1, the present invention provides a speed disturbance generating device for flame response test, which includes a signal generator 1, a signal amplifier 2, a piezoelectric device 3, a vibration plate 4, a flame response tester 5, and a vibration medium 6.
The signal generator 1 and the signal amplifier 2 are positioned outside the flame response tester 5, and are connected, the signal generator 1 can generate harmonic signals with different frequencies required by the test, and the signal amplifier 2 receives and amplifies the harmonic signals generated by the signal generator 1.
The piezoelectric device 3 is arranged on the vibrating plate 4, can be positioned on any one of two sides of the vibrating plate, is at least provided with one piezoelectric device, and can be provided with a plurality of piezoelectric devices according to the need to realize the large-scale adjustment of the amplitude and the phase of the speed disturbance; the vibrating plate 4 is arranged at one end of the air supply pipeline 50 with a larger diameter and is connected with the air supply pipeline 50 in a sealing way; the vibration medium 6 is located in the air supply duct 50 at the end of the vibration plate 4, and the vibration medium 6 may be air. The piezoelectric device 3 is connected with a power amplifier, and after the amplified harmonic signals are transmitted to the piezoelectric device 3, the piezoelectric device 3 is driven to deform, and the piezoelectric device 3 further drives the vibration plate 4 to deform and cause the change of the vibration medium 6. When the piezoelectric device 3 and the vibration medium 6 are respectively located at both sides of the vibration plate 4, the vibration medium 6 may be in a high-temperature and high-pressure state; the piezoelectric device 3 is still in the operating range at this time.
The flame response tester 5 comprises a gas supply pipeline 50, a flame zone 51, a flame heat release measuring instrument 52 and a pressure fluctuation measuring instrument 53, wherein the whole shape of the gas supply pipeline 50 can be designed into a structure with different multi-stage diameters, and the gas supply pipeline 50 can be assembled by multiple sections, so that the gas response tester is convenient to install and adjust the size according to the requirement, and the flame zone 51 is positioned at one end of the gas supply pipeline 50 with smaller diameter and comprises a burner 511 and a flame 510.
The pressure fluctuation measuring instrument 53 is installed on the side wall of the air supply pipe 50 at the end of the flame zone 51, and the flame heat release measuring instrument 52 is an optical measuring instrument and is located outside the flame 510. The deformation of the vibrating plate 4 generates sound waves with specific frequency and amplitude to cause the vibrating medium 6 in the pipeline to generate speed disturbance, the pressure fluctuation measuring instrument 53 tests the amplitude and frequency of the generated speed disturbance and calculates the speed disturbance amplitude and phase, and the speed disturbance amplitude and phase can be modulated by the signal generator 1 and the power amplifier; the flame 510 generates heat release fluctuation under the action of the speed disturbance, and the heat release of the flame 510 can be measured by the flame heat release measuring instrument 52; further, based on the velocity disturbance and the heat release test, a response function of the flame 510 may be established.
The core of the invention is that the piezoelectric type speed disturbance generating device is used for driving the vibration of the vibration plate 4 to vibrate by self deformation based on the input condition of the controllable excitation signal of the piezoelectric crystal, so that the vibration medium 4 is caused to vibrate, and further the speed disturbance with specific frequency and amplitude is generated. The vibration plate 4 and the burner 511 are connected in a sealed manner, and at the same time, are of a rigid structure and have certain pressure resistance and temperature resistance, so that the disturbance generating device can be placed in high-temperature and high-pressure scenes. Meanwhile, compared with the traditional loudspeaker, the device has the characteristics of small volume, light weight, modularized installation form and double-sided installation. Is especially suitable for occasions with compact space, high temperature, high pressure and other relatively severe environments.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. The speed disturbance generating device for the flame response test is characterized by being of a rigid structure, comprising a signal generator (1), a signal amplifier (2), a piezoelectric device (3), a vibrating plate (4), a flame response tester (5) and a vibrating medium (6), wherein the piezoelectric device (3) is arranged on the vibrating plate (4), and the vibrating plate (4) and the vibrating medium (6) are positioned in the flame response tester (5); the signal generator (1) generates harmonic signals, the signal amplifier (2) amplifies the harmonic signals, the piezoelectric device (3) receives the amplified harmonic signals and deforms, the vibrating plate (4) deforms along with the amplified harmonic signals, and the vibrating medium (6) generates speed disturbance in the flame response tester (5).
2. A speed disturbance generating device for flame response test according to claim 1, wherein the piezoelectric device (3) is mounted on one of both sides of the vibration plate (4), and the piezoelectric device (3) is at least one.
3. A speed disturbance generating device for flame response testing according to claim 1, wherein the flame response tester (5) includes a gas supply pipe (50), a flame zone (51), a flame heat release meter (52) and a pressure fluctuation meter (53).
4. A speed disturbance generating device for flame response testing according to claim 3, wherein the vibration plate (4) is mounted at one end of the air supply pipe (50), and the vibration medium (6) is located in the air supply pipe (50) at the end of the vibration plate (4).
5. A speed disturbance generating device for flame response testing according to claim 4, wherein the flame zone (51) is located at an end of the air supply duct (50) where the vibration plate (4) is not installed, and the flame heat release measuring instrument (52) is located at a periphery of the flame zone (51).
6. A speed disturbance generating device for flame response testing according to claim 5, wherein the vibration plate (4) is deformed to generate a speed disturbance of the vibration medium (6) in the air supply pipe (50).
7. A speed disturbance generating device for flame response testing according to claim 6, wherein the speed disturbance is transferred to the flame zone (51) to generate heat release fluctuations.
8. A speed disturbance generating device for flame response testing according to claim 7, wherein said flame heat release meter (52) tests for heat release fluctuations; the pressure fluctuation measuring instrument (53) tests the speed disturbance to obtain a response function of the flame (510).
9. A speed disturbance generating device for flame response testing according to claim 1, wherein the signal generator (1) and the signal amplifier (2) are located outside the flame response tester (5).
10. A speed disturbance generating device for flame response testing according to claim 9, wherein the vibration plate (4) and the flame response tester (5) constitute a sealing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311268323.4A CN117330344A (en) | 2023-09-28 | 2023-09-28 | Speed disturbance generating device for flame response test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311268323.4A CN117330344A (en) | 2023-09-28 | 2023-09-28 | Speed disturbance generating device for flame response test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117330344A true CN117330344A (en) | 2024-01-02 |
Family
ID=89294565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311268323.4A Pending CN117330344A (en) | 2023-09-28 | 2023-09-28 | Speed disturbance generating device for flame response test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117330344A (en) |
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2023
- 2023-09-28 CN CN202311268323.4A patent/CN117330344A/en active Pending
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