CN113188155A - Backflow combustion chamber for wall temperature distribution measurement based on thermocouple - Google Patents
Backflow combustion chamber for wall temperature distribution measurement based on thermocouple Download PDFInfo
- Publication number
- CN113188155A CN113188155A CN202110495157.6A CN202110495157A CN113188155A CN 113188155 A CN113188155 A CN 113188155A CN 202110495157 A CN202110495157 A CN 202110495157A CN 113188155 A CN113188155 A CN 113188155A
- Authority
- CN
- China
- Prior art keywords
- thermocouple
- sleeve
- wall
- flame tube
- temperature
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/54—Reverse-flow combustion chambers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Abstract
The invention discloses a backflow combustion chamber for wall temperature distribution measurement based on a thermocouple, wherein a plurality of threaded holes for measuring temperature are uniformly formed in an inner casing and an outer casing, and a temperature measuring unit is arranged in each threaded hole; the temperature measuring unit comprises a sleeve and a thermocouple, and the outer wall of the sleeve cylinder is provided with a thread matched with the threaded hole; the probe of the temperature measuring unit thermocouple in the threaded hole of the inner casing extends into the inner ring channel to abut against the outer wall of the inner casing of the flame tube, and the probe of the temperature measuring unit thermocouple in the threaded hole of the outer casing extends into the outer ring channel to abut against the outer wall of the outer casing of the flame tube. The invention can realize the temperature measurement of the wall surface of the flame tube, the thermocouples can not interfere with each other, the influence of the thermocouples on the flow field of the combustion chamber can be reduced, and the installation and the disassembly and the replacement are convenient.
Description
Technical Field
The invention relates to the field of design and application of aero-engine combustion chamber models, in particular to a backflow combustion chamber for wall temperature distribution measurement based on a thermocouple.
Background
The combustion temperature and pressure of a combustion chamber are gradually improved along with the continuous improvement of the performance of an aero-engine, the heat load of high-temperature fuel gas on the wall surface of a flame tube is higher and higher, the aero-engine flame tube works in a severe environment for a long time and is one of components bearing high heat load, each component of the engine runs and tests for a long time in the design and manufacturing process, and the high-temperature and high-pressure environment is different in working and has the danger of flammability and explosiveness, so that the detection and monitoring of equipment in the production process are very necessary, the service life of the aero-engine can be prolonged, accidents caused by local overheating faults are avoided, and higher requirements are provided for a monitoring means for comprehensively monitoring and timely alarming when the engine works.
The wall temperature of the flame tube is directly related to the internal combustion organization and the cooling arrangement, and the height of the wall temperature is the key for influencing the service life of the flame tube. In the temperature measurement of the hot end of the aircraft engine, the temperature measurement of the air inlet and outlet temperature, the temperature of combustion gas and the like is diversified, and in order to obtain the detection temperature field distribution or the local temperature of the aircraft engine, the temperature distribution of the flame tube wall can be currently measured by adopting methods such as a thermocouple, temperature indicating paint, infrared induction, laser and the like, and can also be pre-estimated by using a numerical simulation method. In the process of developing an aviation rocket engine, temperature measurement is an important but difficult task to measure accurately, the measurement accuracy of non-measurement means such as infrared induction and laser is easily influenced by various errors, the emissivity is influenced by various factors such as object temperature, processing conditions, surface finish, oxidation degree and dirt conditions, meanwhile, because the method belongs to optical temperature measurement and is also influenced by gas, water vapor and dust, the measurement error in actual measurement is larger, the thermocouple measurement accuracy is high, the method is convenient to measure the temperature of a few points on the wall surface of a flame tube, and the method is the earliest and most widely applied measurement method.
Disclosure of Invention
The invention aims to solve the technical problems that the wall surface temperature of a combustion chamber is difficult to measure and has poor precision and measuring components such as a thermocouple are difficult to disassemble and replace in the background technology, and provides a backflow combustion chamber for measuring the wall temperature distribution based on the thermocouple.
The invention adopts the following technical scheme for solving the technical problems:
the backflow combustion chamber comprises an inner casing, an outer casing and a flame tube, wherein the outer casing and the outer casing of the flame tube form an outer ring channel of the combustion chamber, and the inner casing of the flame tube form an inner ring channel of the combustion chamber;
the inner casing and the outer casing are uniformly provided with a plurality of threaded holes for measuring temperature, and temperature measuring units are arranged in the threaded holes;
the temperature measuring unit comprises a sleeve and a thermocouple, wherein the sleeve is a hollow cylinder with one open end and one closed end, and the outer wall of the cylinder of the sleeve is provided with a thread matched with the threaded hole; the thermocouple is arranged in the sleeve, and the probe of the thermocouple extends out of the open end of the sleeve;
the sleeve of the temperature measuring unit is in threaded connection with the corresponding threaded hole, so that the probe of the thermocouple of the temperature measuring unit in the threaded hole of the inner casing extends into the inner ring channel to abut against the outer wall of the inner casing of the flame tube, and the probe of the thermocouple of the temperature measuring unit in the threaded hole of the outer casing extends into the outer ring channel to abut against the outer wall of the outer casing of the flame tube.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the invention can realize the measurement of the temperature distribution of the wall surface of the flame tube, the sleeve is convenient for installing and disassembling the thermocouples, the thermocouples radially enter the combustion chamber at the same time, the thermocouples can not interfere with each other, and the influence of the thermocouples on the flow field of the combustion chamber can be reduced.
Drawings
FIG. 1 is a schematic partial cross-sectional view of the present invention.
In the figure, 1-outer casing, 2-inner casing, 3-sleeve, 4-thermocouple probe.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
As shown in fig. 1, the invention discloses a backflow combustion chamber for wall temperature distribution measurement based on a thermocouple, comprising an inner casing, an outer casing and a flame tube, wherein an outer casing and the outer casing of the flame tube form an outer ring channel of the combustion chamber, and an inner casing and the inner casing of the flame tube form an inner ring channel of the combustion chamber;
the inner casing and the outer casing are uniformly provided with a plurality of threaded holes for measuring temperature, and temperature measuring units are arranged in the threaded holes;
the temperature measuring unit comprises a sleeve and a thermocouple, wherein the sleeve is a hollow cylinder with one open end and one closed end, and the outer wall of the cylinder of the sleeve is provided with a thread matched with the threaded hole; the thermocouple is arranged in the sleeve, and the probe of the thermocouple extends out of the open end of the sleeve;
the sleeve of the temperature measuring unit is in threaded connection with the corresponding threaded hole, so that the probe of the thermocouple of the temperature measuring unit in the threaded hole of the inner casing extends into the inner ring channel to abut against the outer wall of the inner casing of the flame tube, and the probe of the thermocouple of the temperature measuring unit in the threaded hole of the outer casing extends into the outer ring channel to abut against the outer wall of the outer casing of the flame tube.
The invention can realize the measurement of the temperature distribution of the wall surface of the flame tube, the sleeve is convenient for installing and disassembling the thermocouples, the thermocouples radially enter the combustion chamber at the same time, the thermocouples can not interfere with each other, and the influence of the thermocouples on the flow field of the combustion chamber can be reduced.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The utility model provides a backflow combustion chamber based on thermocouple carries out wall temperature distribution measurement, including interior machine casket, outer machine casket and flame tube, the outer loop that the outer casing of flame tube and outer quick-witted casket formed the combustion chamber, and the inner shell and the interior machine casket of flame tube form the inner loop way of combustion chamber, its characterized in that:
the inner casing and the outer casing are uniformly provided with a plurality of threaded holes for measuring temperature, and temperature measuring units are arranged in the threaded holes;
the temperature measuring unit comprises a sleeve and a thermocouple, wherein the sleeve is a hollow cylinder with one open end and one closed end, and the outer wall of the cylinder of the sleeve is provided with a thread matched with the threaded hole; the thermocouple is arranged in the sleeve, and the probe of the thermocouple extends out of the open end of the sleeve;
the sleeve of the temperature measuring unit is in threaded connection with the corresponding threaded hole, so that the probe of the thermocouple of the temperature measuring unit in the threaded hole of the inner casing extends into the inner ring channel to abut against the outer wall of the inner casing of the flame tube, and the probe of the thermocouple of the temperature measuring unit in the threaded hole of the outer casing extends into the outer ring channel to abut against the outer wall of the outer casing of the flame tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495157.6A CN113188155A (en) | 2021-05-07 | 2021-05-07 | Backflow combustion chamber for wall temperature distribution measurement based on thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495157.6A CN113188155A (en) | 2021-05-07 | 2021-05-07 | Backflow combustion chamber for wall temperature distribution measurement based on thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113188155A true CN113188155A (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110495157.6A Pending CN113188155A (en) | 2021-05-07 | 2021-05-07 | Backflow combustion chamber for wall temperature distribution measurement based on thermocouple |
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| CN (1) | CN113188155A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639896A (en) * | 2021-08-12 | 2021-11-12 | 沈阳航空航天大学 | Indirect temperature measurement method for aircraft engine case |
| CN116046195A (en) * | 2023-04-03 | 2023-05-02 | 中国航发四川燃气涡轮研究院 | Movable type aeroengine wheel disk temperature measuring device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608953A (en) * | 2008-06-19 | 2009-12-23 | 北京航空航天大学 | The measuring method and the device of a kind of firing chamber internal face temperature and heat flux distribution |
| CN103592132A (en) * | 2013-10-31 | 2014-02-19 | 哈尔滨汽轮机厂有限责任公司 | Pressurization visual combustion test device of combustor of gas turbine |
| CN105277290A (en) * | 2014-07-21 | 2016-01-27 | 北京航天动力研究所 | Combustion chamber wall temperature gradient measurement module |
| CN105277291A (en) * | 2014-07-21 | 2016-01-27 | 北京航天动力研究所 | Combustion chamber wall temperature gradient measurement module |
| CN109341883A (en) * | 2018-10-25 | 2019-02-15 | 浙江大学 | A kind of total temperature measurement device in aeroengine combustor buring room |
-
2021
- 2021-05-07 CN CN202110495157.6A patent/CN113188155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608953A (en) * | 2008-06-19 | 2009-12-23 | 北京航空航天大学 | The measuring method and the device of a kind of firing chamber internal face temperature and heat flux distribution |
| CN103592132A (en) * | 2013-10-31 | 2014-02-19 | 哈尔滨汽轮机厂有限责任公司 | Pressurization visual combustion test device of combustor of gas turbine |
| CN105277290A (en) * | 2014-07-21 | 2016-01-27 | 北京航天动力研究所 | Combustion chamber wall temperature gradient measurement module |
| CN105277291A (en) * | 2014-07-21 | 2016-01-27 | 北京航天动力研究所 | Combustion chamber wall temperature gradient measurement module |
| CN109341883A (en) * | 2018-10-25 | 2019-02-15 | 浙江大学 | A kind of total temperature measurement device in aeroengine combustor buring room |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639896A (en) * | 2021-08-12 | 2021-11-12 | 沈阳航空航天大学 | Indirect temperature measurement method for aircraft engine case |
| CN116046195A (en) * | 2023-04-03 | 2023-05-02 | 中国航发四川燃气涡轮研究院 | Movable type aeroengine wheel disk temperature measuring device |
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Application publication date: 20210730 |
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