CN106872064A - A kind of test device of turbine outlet section gas temperature field - Google Patents
A kind of test device of turbine outlet section gas temperature field Download PDFInfo
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- CN106872064A CN106872064A CN201710135732.5A CN201710135732A CN106872064A CN 106872064 A CN106872064 A CN 106872064A CN 201710135732 A CN201710135732 A CN 201710135732A CN 106872064 A CN106872064 A CN 106872064A
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000012937 correction Methods 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
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- 238000010998 test method Methods 0.000 claims description 4
- 238000007596 consolidation process Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 2
- 229920005479 Lucite® Polymers 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- QDLZHJXUBZCCAD-UHFFFAOYSA-N [Cr].[Mn] Chemical compound [Cr].[Mn] QDLZHJXUBZCCAD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 239000000788 chromium alloy Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 239000005336 safety glass Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000011282 treatment Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000009529 body temperature measurement Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000002210 silicon-based material Substances 0.000 description 3
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000004861 thermometry Methods 0.000 description 2
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- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
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Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
The present invention relates to a kind of test device of turbine outlet section gas temperature field, belong to field of power machinery technology.Including turbocharger, indirect thermometric net, correction thermocouple, thermal infrared imager and corresponding connecting line and circuit；Indirect thermometric net can obtain turbine outlet section gas temperature information；Thermal infrared imager can obtain the temperature field information of indirect thermometric net --- turbine outlet section gas temperature field information；Correction thermocouple is used to check technics of temperature measurement precision with infrared thermal imager.Test device of the present invention is scientific and reasonable, easily realizes, reliable and stable, certainty of measurement is high, can measure turbine outlet section gas temperature field, and the turbine isentropic efficiency obtained with this temperature measuring equipment is more accurate, and the acquisition to turbine characteristic is significant.
Description
Technical field
The present invention relates to a kind of test device of turbine outlet section gas temperature field, belong to field of power machinery technology.
Background technology
Turbocharger promotes turbine acting using I. C. engine exhaust energy, increases inlet pressure of internal combustion engines, so that interior
Combustion engine power is improved, fuel consumption and exhaust pollution are reduced, and the performance of internal combustion engine is greatly improved.With calculating
Hydromechanical development, although can be designed according to the performance parameter of design conditions engine high performance with engine phase
The turbocharger matched somebody with somebody, but, finally the performance data of compressor and turbine must be measured to verify design just by experiment
True property, to be modified to design, obtains the optimal type of performance.
The turbine characteristic curve obtained by turbine test, can not only judge whether turbine performance parameter meets its pneumatic property
The index of energy, moreover it is possible to reflect the production technology quality of turbine to a certain extent, technology is provided to improve turbocharger performance
Foundation.It is the turbocharged engine apolegamy indispensable technical conditions of booster.Turbine performance experiment maximum difficult point be
Obtain the isentropic efficiency characteristic of turbine.According to the computing formula of turbine isentropic efficiency, if turbine turnover gas can be measured
Temperature drop, just can directly obtain its isentropic efficiency, obtain turbine isentropic efficiency characteristic.Generally, turbine inlet temperature (TIT) is easily measured,
Because taking technical measures its import section gas temperature can be made uniform, meet the requirement of measuring accuracy.And turbine outlet is general
In the presence of very strong eddy flow and inhomogeneities, temperature is different everywhere in exit gas same section, it is difficult to accurately measure its outlet temperature,
So in existing turbine isentropic efficiency attribute testing, typically direct measurement turbine does not pass in and out the temperature drop of gas, but passes through
Various dynamometer machines or indirect measurement method obtain the actual expansion work of turbine, so as to calculate turbine isentropic efficiency.But due to
The rotating ratio of booster is higher, generally reaches per minute more than ten or even twenties0000 turns, and dynamometer machine is difficult to meet such high turning
Speed is required so that this dynamometer machine involves great expense, and needs to do larger changing to the structure of booster and support at the trial
Dynamic, the test period is long；On the other hand, the mechanical loss in test process also is difficult to estimation.These shortcomings cause this survey
The turbine isentropic efficiency precision that method for testing is obtained is not high.Existing turbine outlet thermometry be using thermocouple come
Measure, but this measuring method can only measure the temperature of turbine outlet certain point, it is impossible to measure whole cross section
Gas temperature, the isentropic efficiency of turbine cannot be also calculated using its data.Although by use the multiple thermocouples can be with
Measurement turbine outlet section multi-point temp, but measuring point is limited after all, and due to having used branched thermocouple, and can make
The thermodynamic state of turbine outlet changes, and temperature-measuring results is produced larger error.Due to above reason, at present both at home and abroad not
There is the test device that can accurately measure turbine outlet section gas temperature field.
The content of the invention
The invention aims to solve the problems, such as that prior-art devices involve great expense and measuring accuracy is not high, there is provided
A kind of test device of turbine outlet section gas temperature field, the device is used to obtain the isentropic efficiency of turbine, obtains turbine effect
Rate characteristic.
The purpose of the present invention is realized by following technical scheme.
A kind of test device for measuring turbine outlet section gas temperature field, including：Indirect thermometric net, correction thermocouple,
Thermometric mirror, thermal infrared imager, thermometric bend pipe.
The indirect thermometric net is formed by metal wire knitted；Consolidation has high-termal conductivity, occurred frequently at the node of wire
Penetrate the particle of rate.
The wire is high temperature resistant and the poor wire of thermal conductivity.
The high temperature refers to that temperature is 700-800 DEG C；It refers to that material thermal conductivity is less than 20W/m.K that thermal conductivity is poor；
The wire includes：Nickel wire, chromium wire, nichrome wire or manganese chromium alloy wire；
The particle with high-termal conductivity, high emissivity, high-termal conductivity refers to that thermal conductivity factor is higher than 460W/m.K, occurred frequently
The rate of penetrating refers to that emissivity is higher than 0.85；
The particle includes：Carbon silicon grain, carbon particle or nickel oxide particle；
Annexation：Thermometric bend pipe is connected with turbine outlet pipeline；Junction is provided with indirect thermometric net；Indirect thermometric net
It is fixedly connected with pipeline；Correction thermocouple is placed in thermometric bend pipe, and is close to indirect thermometric net；The turning side of thermometric bend pipe
Through hole is opened up on wall, through hole is provided with thermometric mirror；Thermal infrared imager collects the red of whole thermometric net indirectly by thermometric mirror
Outer image；
Scale is carried on correction thermal resistance, to ensure that the measuring point for correcting thermal resistance is located at same half with indirect thermometric net particle
At footpath；
The measuring point for correcting thermal resistance is located at indirect thermometric net center.
The material of thermometric mirror uses quartz glass, lucite, safety glass or titanizing glass；
Method of testing：After turbine stable operation, treat that indirect thermometric net reaches thermal balance, indirect thermometric with turbine outlet
Net temperature stabilization and it is identical with turbine outlet temperature when, adjust thermal infrared imager visual field, carry out the survey of thermal infrared imager
Temperature focusing, so as to get picture it is clearly reliable.Now, it is utilized respectively thermal infrared imager and thermocouple measures turbine outlet
Temperature signal, and the temperature signal that thermocouple is measured uploads to PC Temperature Treatments with the temperature field signal that thermal infrared imager is measured
End is compared, and the amendment that realization measures temperature information to thermal infrared imager is checked.Finally, the infrared temperature after checking will be corrected
Degree field information is calculated by PC data processing softwares, obtains the mean temperature of infrared temperature.
Beneficial effect
1st, compared with the point for measuring turbine outlet temperature by multiple thermocouples in the past measures experimental rig, this dress
The influence that can reduce temperature measuring equipment to exit gas flow regime is put, and enough multiple spots of whole outlet can be measured
Profiling temperatures, belong to planar survey, and the temperature information for measuring is accurate more many than traditional thermoelectricity pair-point measurement.
2nd, using thermocouple measurement high precision the characteristics of, thermal infrared imager is modified, can be completed to thermometric information
Amendment, improve temperature-measuring results precision.
3rd, compared with generally turbine isentropic efficiency is calculated using the method for dynamometer machine or indirect measurement of power, the present apparatus can be with
Direct measurement turbine outlet temperature, obtains turbine and imports and exports the gas temperature difference, and the isentropic efficiency obtained by calculating is more accurate, and
And eliminate the influence of bearing arrangement mechanical loss.
4th, measurement apparatus simple structure, easily realizes, reliable and stable, certainty of measurement is high, significantly reduces experimentation cost.
Brief description of the drawings
Fig. 1 is gas temperature field test device schematic diagram in turbine outlet section of the present invention；
Fig. 2 is thermocouple of the present invention and thermometric net installation site relation；
Fig. 3 is the indirect thermometric host's view of the present invention；
Fig. 4 is the indirect thermometric net side view of the present invention.
Wherein, 1- compressors, 2- turbines, the indirect thermometric nets of 3-, 4- correction thermocouples, 5- thermometric mirrors, 6- thermal infrared imagers,
7- thermometric bend pipes.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the accompanying drawings and specific implementation method
Technical scheme is described in further detail.
Embodiment 1
A kind of test method for measuring turbine outlet section gas temperature field, concrete structure includes：Turbocharger, indirectly
Thermometric net 3, corrects thermocouple 4, thermometric mirror 5, thermal infrared imager 6, thermometric bend pipe 7.
Indirect thermometric net 3 is made up of nichrome silk screen and carbon silicon materials particle, and carbon silicon materials Particle consolidation is closed in nickel chromium triangle
On spun gold mesh point.Nichrome wire surface oxidation-resistant is good, and temperature level is high, and has intensity higher at high temperature, has
Good processing characteristics, and its thermal resistance is larger, and heat conductivility is poor, it is possible to reduce the heat transfer between neighbor mesh points.Carbon
Silicon materials particle has emissivity higher, and heat-radiating properties are good, and thermal conductivity is good, quick heating, and thermal infrared imager can be made more preferable
Quickly capture temperature field information.Indirect thermometric net is fixed between two flanges, and is lined between thermometric net and flange
Heat insulating mattress, reduces heat transfer of the thermometric net to flange.
Correction thermocouple：Thermocouple is arranged on a thermometric net section as near as possible, according on correction thermocouple
Scale, adjustment correction thermocouple inserts the depth of pipeline, and the temperature of the measurable some characteristic points of gas cross section is realized to infrared heat
As the check of instrument thermometric information.
Thermometric mirror：Installed in the turbine outlet bend pipe with light transmission device of turbine outlet thermometric trip appropriate location off the net
Place.
Thermal infrared imager：Thermal infrared imager is placed on correct position after thermometric mirror, makes measurement gained temperature field image clear
It is reliable.Thermal infrared imager has temperature measurement accuracy and sensitivity of thermometry higher, can accurately catch change of temperature field.
The turbocharger is made up of compressor 1 and turbine 2；
Annexation：Thermometric bend pipe 7 is connected with the export pipeline of turbine 2；Junction is provided with indirect thermometric net 3；Survey indirectly
Wembledon tennis open competition 3 is fixedly connected with pipeline；Correction thermocouple 4 is placed in thermometric bend pipe 7, and is close to indirect thermometric net 3；Thermometric bend pipe 7
Turning side wall on open up through hole, through hole is provided with thermometric mirror 5, be easy to observation；Thermal infrared imager 6 is adopted by thermometric mirror 5
Collect the infrared image of whole thermometric net 3 indirectly；
A kind of method of testing of turbine outlet section gas temperature field, it is as follows that it specifically performs step：
Step one：Preparation before thermometric
Grid number according to indirect thermometric net 3 selects the suitable resolution of lens of thermal infrared imager 6, selects suitable temperature
Treatment software and algorithm.
Step 2：Thermometric is focused
External air source is connected, is provided to the turbine 2 of temperature measuring equipment and is driven gas, turbine 2 is brought into operation.Treat that turbine 2 is steady
After fixed operation a period of time, the distance between adjustment thermal infrared imager 6 and thermometric mirror 5, and image pair is carried out to thermal infrared imager 6
It is burnt, so as to get thermal infrared imager 6 temperature visual field it is clearly reliable.
Step 3：Thermometric process
The continuous service of turbine 2, makes indirect thermometric net 3 reach thermal balance, the indirect temperature of thermometric net 3 with the exit gas of turbine 2
It is identical with the Outlet Gas Temperature of turbine 2.The thermal infrared imager 6 of completion of having focused just is measured to indirect thermometric net 3, will be surveyed
The temperature signal for taking uploads to PC ends.Thermocouple 4 is corrected simultaneously also measures the temperature for having obtained some characteristic points of exit gas of turbine 2
Degree, will measure the temperature signal for obtaining and also uploads to PC ends.
Step 3：Temperature is checked and processed
In the temperature that PC ends, some section feature point temperature informations that correction thermocouple 4 is measured measure with thermal infrared imager 6
Degree field information is compared, the amendment in the temperature field that realization is measured to thermal infrared imager 6.By revised infrared temperature information
Temperature Treatment software is input to, by being calculated the mean temperature in temperature field, this temperature is turbine outlet temperature.
Claims (10)
1. a kind of test device for measuring turbine outlet section gas temperature field, it is characterised in that：Including indirect thermometric net (3),
Correction thermocouple (4), thermometric mirror (5), thermal infrared imager (6) and thermometric bend pipe (7)；
The indirect thermometric net (3) is formed by metal wire knitted；Consolidation has high-termal conductivity, high emission at the node of wire
The particle of rate；
Thermometric bend pipe (7) is connected with turbine (2) export pipeline；Junction is provided with indirect thermometric net (3)；Indirect thermometric net (3)
It is fixedly connected with pipeline；Correction thermocouple (4) is placed in thermometric bend pipe (7), and is close to indirect thermometric net (3)；Thermometric bend pipe
(7) through hole is opened up on turning side wall, through hole is provided with thermometric mirror (5)；Thermal infrared imager (6) is adopted by thermometric mirror (5)
Collect the infrared image of whole thermometric net (3) indirectly.
2. a kind of test device for measuring turbine outlet section gas temperature field as claimed in claim 1, it is characterised in that：Institute
Wire is stated for high temperature resistant and the poor wire of thermal conductivity.
3. a kind of test device for measuring turbine outlet section gas temperature field as claimed in claim 2, it is characterised in that：Institute
It refers to that temperature is 700-800 DEG C to state high temperature；It refers to that material thermal conductivity is less than 20W/m.K that thermal conductivity is poor.
4. a kind of test device for measuring turbine outlet section gas temperature field as claimed in claim 1 or 2, its feature exists
In：The wire includes：Nickel wire, chromium wire, nichrome wire or manganese chromium alloy wire.
5. a kind of test device for measuring turbine outlet section gas temperature field as claimed in claim 1, it is characterised in that：Institute
The high-termal conductivity for stating particle refers to that thermal conductivity factor is higher than 460W/m.K, and high emissivity refers to that emissivity is higher than 0.85.
6. a kind of test device of the measurement turbine outlet section gas temperature field as described in claim 1 or 5, its feature exists
In：The particle includes：Carbon silicon grain, carbon particle or nickel oxide particle.
7. a kind of test device for measuring turbine outlet section gas temperature field as claimed in claim 1, it is characterised in that：Institute
State in correction thermal resistance (4) with scale.
8. a kind of test device of the measurement turbine outlet section gas temperature field as described in claim 1 or 7, its feature exists
In：The measuring point of correction thermal resistance (4) is located at indirect thermometric net (3) center.
9. a kind of test device for measuring turbine outlet section gas temperature field as claimed in claim 1, it is characterised in that：Survey
The material of Wen Jing (5) uses quartz glass, lucite, safety glass or titanizing glass.
10. the test of a kind of measurement turbine outlet section gas temperature field as described in claim 1 or 2 or 3 or 5 or 7 or 9 is filled
Put, it is characterised in that：The method of testing of described device is：After turbine stable operation, indirect thermometric net and turbine outlet are treated
Reach thermal balance, indirect thermometric net temperature stabilization and it is identical with turbine outlet temperature when, adjust the visual field of thermal infrared imager,
Carry out the thermometric focusing of thermal infrared imager, so as to get picture it is clearly reliable；Now, thermal infrared imager and correction heat are utilized respectively
Galvanic couple measures the temperature signal of turbine outlet, and will correct what temperature signal that thermocouple measures and thermal infrared imager were measured
Temperature field signal uploads to PC Temperature Treatments end and compares, and the amendment that realization measures temperature information to thermal infrared imager is checked；
Finally, the infrared temperature information after checking will be corrected to be calculated by PC data processing softwares, infrared temperature is obtained
Mean temperature.
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| CN201710135732.5A CN106872064B (en) | 2017-03-09 | 2017-03-09 | A kind of test device of turbine outlet section gas temperature field |
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| CN201710135732.5A CN106872064B (en) | 2017-03-09 | 2017-03-09 | A kind of test device of turbine outlet section gas temperature field |
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| CN106872064A true CN106872064A (en) | 2017-06-20 |
| CN106872064B CN106872064B (en) | 2019-02-26 |
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Cited By (7)
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| CN108507683A (en) * | 2018-05-14 | 2018-09-07 | 昆明理工大学 | A kind of drum charging machine interior environment temperature measuring device and its measurement method |
| RU2676237C1 (en) * | 2018-02-13 | 2018-12-26 | Федеральное государственное унитарное предприятие "Центральный институт авиационного моторостроения имени П.И. Баранова" | Device for determining temperature of gaseous media in gas turbine engines |
| CN109238473A (en) * | 2018-11-02 | 2019-01-18 | 汕头大学 | A kind of apparatus and method that the interference of infrared image sensor array dust is calibrated |
| CN111413099A (en) * | 2020-03-24 | 2020-07-14 | 武汉理工大学 | Verification device for temperature measuring method of inner wall surface of heated part of engine |
| CN112100862A (en) * | 2020-09-24 | 2020-12-18 | 南京航空航天大学 | Novel turbine isentropic efficiency fast solving method based on variable specific heat capacity |
| CN113155291A (en) * | 2021-03-22 | 2021-07-23 | 中国农业大学 | Temperature distribution monitoring device and monitoring method thereof |
| CN113566993A (en) * | 2020-04-28 | 2021-10-29 | 中国航发商用航空发动机有限责任公司 | Engine temperature measuring device and heat insulation lining thereof |
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| CN111413099A (en) * | 2020-03-24 | 2020-07-14 | 武汉理工大学 | Verification device for temperature measuring method of inner wall surface of heated part of engine |
| CN113566993A (en) * | 2020-04-28 | 2021-10-29 | 中国航发商用航空发动机有限责任公司 | Engine temperature measuring device and heat insulation lining thereof |
| CN112100862A (en) * | 2020-09-24 | 2020-12-18 | 南京航空航天大学 | Novel turbine isentropic efficiency fast solving method based on variable specific heat capacity |
| CN113155291A (en) * | 2021-03-22 | 2021-07-23 | 中国农业大学 | Temperature distribution monitoring device and monitoring method thereof |
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