CN207850559U - A kind of transient heat flow sensor - Google Patents
A kind of transient heat flow sensor Download PDFInfo
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- CN207850559U CN207850559U CN201820351798.8U CN201820351798U CN207850559U CN 207850559 U CN207850559 U CN 207850559U CN 201820351798 U CN201820351798 U CN 201820351798U CN 207850559 U CN207850559 U CN 207850559U
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- free copper
- heat flow
- copper thermal
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Abstract
The utility model discloses a kind of transient heat flow sensors, including：Calorimetric probe case body and heat flow transducer ontology, heat flow transducer ontology include：Oxygen-free copper thermal conductor, center are provided with receiving opening；And receiving opening increases close to its internal diameter of the position of oxygen-free copper thermal conductor front end；Oxygen-free copper thermal conductor is connected to by mounting flange structure in calorimetric probe case body；Dew type armoured thermocouple is held, is fixed in the receiving opening of oxygen-free copper thermal conductor, and holds the temperature measuring point of dew type armoured thermocouple to be in the center of oxygen-free copper thermal conductor receiving opening and the outlet port of its head distance receiving opening to have certain distance；Fine silver plunger is connected to the outlet port of oxygen-free copper thermal conductor receiving opening by way of casting or melting welding, and forms one with the head of end dew type armoured thermocouple；The new structural transient heat flow sensor simple, quality control easy to implement with processing and assembly technology is conducive to improve sensor thermal response speed and testing precision.
Description
Technical field
The utility model belongs to ground solar heat protection experimental technique field, and in particular to a kind of new structural transient heat flow sensing
Device.
Background technology
Hypersonic aircraft can form height in endoatmosphere flight, with surrounding air interaction in aircraft surface
Warm boundary layer applies huge aerothermal load to the structure of aircraft, material, seriously affects structure safety and the longevity of aircraft
Life.In order to which Effective selection, assessment and identification aircraft heat insulation material and the anti-thermal characteristics of structure, arc tunnel and electro-arc heater are normal
As important Aerodynamic Heating and thermal protection ground simulation test platform, tens MW/m of simulation are generally required2Superelevation hot-fluid it is pneumatic
Heating environment.Transient heat flow measurement method is mainly based upon the Duhamel theoretical methods of surface temperature in the anti-heat test in ground.But
It is direct that sensor hull-skin temperature thermocouple in electric arc flow field is washed away in the anti-heat test superhigh temperature of hypersonic ground simulation, height
Test is often very difficult.Therefore it is usually used in the transient heat flow sensor of the impulse wind tunnel experimental test of millisecond magnitude
(such as film heat flux sensor and coaxial thermocouple) cannot be satisfied arc tunnel and electro-arc heater transient heat flow testing requirement.Often
The zero calorimeter measured for transient heat flow obtains Semi-infinite One-dimensional body thermal conductor indirectly using inner cavity " zero " position temperature
Front surface Temperature-time data, and thus calculate front surface input hot-fluid.But exist following difficult：1) due to inner cavity aperture
It is more than 10 less than 1mm, draw ratio and is blind hole, therefore mechanical processing difficulty is big, it is difficult to meets the processing of intracavity bottom geometric dimension
Required precision；2) in order to realize that transient heat flow is tested, the oxygen-free copper (fine copper) of high thermal conductivity coefficient is usually used to be used as thermal-flow sensor
Device thermal conductor, but it is difficult directly to carry out metallurgical thawing Welding Problems in cavity bottom that can bring thermal cross.Therefore, frequently with
Solder paste welding manner, but there are larger thermal contact resistance and soldering places deviation are big.The above problem directly results in zero amount
Heat meter processing quality is difficult to control, and the response time is slow and test error is big (even up to 20%), influences it and effectively applies.This
Utility model is directed to the above situation, it is proposed that a kind of new structural transient heat flow sensor.
Utility model content
One purpose of the utility model is to solve at least the above and/or defect, and provide and at least will be described later
The advantages of.
The purpose of this utility model is to provide a kind of new structural transient heat flow sensors, and it is suitable for hypersonic
Aircraft ground simulates the high hot-fluid instantaneous measurement under the experimental conditions such as anti-heat test.
In order to realize these purposes and other advantages according to the present utility model, a kind of transient heat flow sensor is provided,
Including：
Calorimetric probe case body, it is internal that there is accommodating chamber；The head of the calorimetric probe case body is provided with and accommodates
The receiving channel of chamber connection；
Heat flow transducer ontology is arranged in accommodating chamber, and the heat flow transducer ontology includes：
Oxygen-free copper thermal conductor, front end are arranged in receiving channel, and the center of the oxygen-free copper thermal conductor is provided with appearance
Receive through-hole；And the receiving opening increases close to its internal diameter of the position of oxygen-free copper thermal conductor front end；The oxygen-free copper thermal conductor is logical
The mounting flange structure being arranged thereon is crossed to be detachably connected in the accommodating chamber of calorimetric probe case body；
Dew type armoured thermocouple is held, being fixed on oxygen-free copper by the installation jackscrew for being arranged in oxygen-free copper thermal conductor end passes
In the receiving opening of hot body, and the temperature measuring point of end dew type armoured thermocouple is made to be in the center of oxygen-free copper thermal conductor receiving opening
Position and there is certain distance in the outlet port of its head distance receiving opening；
Fine silver plunger is arranged by way of casting or melting welding in the outlet port of oxygen-free copper thermal conductor receiving opening,
And it is formed and is connected with the head of end dew type armoured thermocouple.
Preferably, the calorimetric probe case body has circular head design.
Preferably, the oxygen-free copper thermal conductor is the tubular structure of diameter of phi 3mm, overall length 11.7mm, institute
The internal diameter for stating the receiving opening of oxygen-free copper thermal conductor center is Φ 0.68mm；And the receiving opening conducts heat close to oxygen-free copper
The internal diameter of the position of body front end increases to Φ 1mm.
Preferably, the outer diameter of the end dew type armoured thermocouple is Φ 0.5mm；The head of the end dew type armoured thermocouple
Distance of the portion apart from the outlet port of receiving opening is 0.3mm.
Preferably, the part that the end dew type armoured thermocouple is located at oxygen-free copper thermal conductor rear end passes through epoxide-resin glue
It is fixedly connected with the rear end of oxygen-free copper thermal conductor.
Preferably, the mounting flange structure on the oxygen-free copper thermal conductor is detachably connected on by M2 hexagon socket head cap screws
In calorimetric probe case body.
Preferably, between the mounting flange structure of the oxygen-free copper thermal conductor and calorimetric probe case body and six in M2
The mica spacer of 0.3mm thickness is all provided between corner bolt and the mounting flange structure of oxygen-free copper thermal conductor；The mica spacer
Thickness be 0.3mm.
Preferably, oxygen-free copper thermal conductor in receiving channel and calorimetric probe case side are set to having 0.1mm's
The gap magnesia powder of the heat-insulated gap of annular air and front end face is sealed with waterglass mixture.
Preferably, a diameter of Φ 16mm, thickness 3mm of the mounting flange structure.
Preferably, a diameter of Φ 1mm of the fine silver plunger.
The utility model includes at least following advantageous effect：A kind of new structural transient heat flow described in the utility model
Sensor preparation process difficulty reduces, and temperature thermocouple welding procedure is simple, welding position controllability is strong, mounting flange structure
Facilitate the installation of zero calorimeter and heat transfer interference will not be introduced；The novel knot is all shown by simulation analysis and test result
The transient heat flow sensor of structure is based on the heat transfer of Semi-infinite One-dimensional body and assumes that calorimetric formula, calorimetric response time are less than 0.03 second (such as
Shown in Fig. 2), contrast test relative deviation is less than 6% (as shown in table 1), meets transient heat flow testing requirement.
Part is illustrated to embody by the further advantage, target and feature of the utility model by following, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Description of the drawings：
Fig. 1 is the cross-sectional view of transient heat flow sensor described in the utility model.
Fig. 2 is transient heat flow sensor calorimetric response time testing result described in the utility model.
Specific implementation mode：
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art with reference to explanation
Book word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
A kind of new structural transient heat flow sensor with calorimetric probe case of the utility model can be suitable for electricity
Arc wind-tunnel and the scanning of Arc-jet test environmental flow heat flux distribution and stationary point hot-fluid transient test.For currently used for transient state
There are processing qualities to be difficult to control for the zero calorimeter of heat-flow measurement, and the response time is slow and the big problem of test error, this practicality
Thermal conductor of the new design with mounting flange, and propose a kind of tiny dew end armoured thermocouple through-hole and install and fixed with position
Structure；A kind of new casting or welding Joining Technology are given, fine silver plunger is formed in measuring junction outer end, ensure that thermocouple
Relative position and connection between measuring point and thermal conductor is good；Devise between sensor body and calorimetric probe case it is heat-insulated with
It is insulated gasket, avoids heat transfer and electrical Interference.The new structural transient heat flow sensor has processing and assembler
Skill is simple, quality control easy to implement, is conducive to improve sensor thermal response speed and testing precision.
Fig. 1 shows a kind of transient heat flow sensor of the utility model, including：Calorimetric probe case body 8, internal tool
There is accommodating chamber 81；The head of the calorimetric probe case body 8 is provided with the receiving channel 82 being connected to accommodating chamber；Heat flow transducer
Ontology is arranged in accommodating chamber 81, and the heat flow transducer ontology includes：Oxygen-free copper thermal conductor 2, front end setting are accommodating
In channel 82, the center of the oxygen-free copper thermal conductor 2 is provided with receiving opening 21；And the receiving opening 21 is close to oxygen-free copper
Its internal diameter of the position of 2 front end of thermal conductor increases；The oxygen-free copper thermal conductor 2 is removable by the mounting flange structure 22 being arranged thereon
It unloads and is connected in the accommodating chamber 81 of calorimetric probe case body 8；
Dew type armoured thermocouple 5 is held, anaerobic is fixed on by the installation jackscrew 3 for being arranged in 2 end of oxygen-free copper thermal conductor
In the receiving opening 21 of copper thermal conductor 2, and make the temperature measuring point of end dew type armoured thermocouple 5 is in oxygen-free copper thermal conductor and accommodates to lead to
The center in hole 21 and there is certain distance in the outlet port of its head distance receiving opening 21；2 end of the oxygen-free copper thermal conductor
The threaded hole to match with installation jackscrew 3 is provided on end；Fine silver plunger 1 is arranged by way of casting or melting welding in nothing
The outlet port of oxygen copper thermal conductor receiving opening 21, and formed and connected with the head of end dew type armoured thermocouple 5；
In this technical solution, by the way of casting or melting welding, fine silver welding is connect in end dew type armoured thermocouple
On head, formation fine silver plunger is simultaneously integral with the oxygen-free copper thermal conductor welding of surrounding, to ensure that heat carrier has with thermocouple
Good connection, it is ensured that conduct heat between oxygen-free copper thermal conductor and end dew type armoured thermocouple good, hence it is evident that thermal contact resistance is reduced,
It improves thermal response speed and reduces difficulty of processing.
In the above-mentioned technical solutions, the calorimetric probe case body has circular head design；The oxygen-free copper heat transfer
Body is the tubular structure of diameter of phi 3mm, overall length 11.7mm, the receiving opening of oxygen-free copper thermal conductor center
Internal diameter is Φ 0.68mm；And the internal diameter of the receiving opening close to the position of oxygen-free copper thermal conductor front end increases to Φ 1mm with logical
The mode for crossing casting or melting welding forms fine silver plunger.
In the above-mentioned technical solutions, the outer diameter of the end dew type armoured thermocouple is Φ 0.5mm；The end dew type armouring heat
The distance of the outlet port of the head distance receiving opening of galvanic couple is 0.3mm.
In the above-mentioned technical solutions, the end dew type armoured thermocouple 5 is located at the part of 2 rear end of oxygen-free copper thermal conductor and passes through
Epoxide-resin glue 4 is fixedly connected with the rear end of oxygen-free copper thermal conductor 2, in this way, further strengthens end dew type armouring heat
Galvanic couple is connected and fixed with oxygen-free copper thermal conductor.
In the above-mentioned technical solutions, the mounting flange structure on the oxygen-free copper thermal conductor can by M2 hexagon socket head cap screws 6
Dismantling connection is in calorimetric probe case body；A diameter of Φ 16mm, the thickness 3mm of the mounting flange structure, mounting flange
The through-hole of uniformly distributed four diameter of phi 2.2mm matches with M2 hexagon socket head cap screws in structure connect；The peace of the oxygen-free copper thermal conductor
Fill between flange arrangement and calorimetric probe case body and the mounting flange structure of M2 hexagon socket head cap screws and oxygen-free copper thermal conductor it
Between all be provided with 0.3mm thickness insulation mica spacer 7；The thickness of the insulation mica spacer is 0.3mm；Using mica spacer
Mode shields heat transfer and electric signal interference.
In the above-mentioned technical solutions, oxygen-free copper thermal conductor in receiving channel and calorimetric probe case side are set to having
The heat-insulated gap of annular air of 0.1mm, and the gap magnesia powder of front end face is sealed with waterglass mixture.
Fig. 2 shows being transient heat flow sensor calorimetric response time testing result described in the utility model, specifically in fact
The process of testing is：Using the heat gun of 600 DEG C of set temperature as convection heat sources；Between heat gun and transient heat flow sensor
Equipped with manual shutter；By quickly opening shutter, realize to transient heat flow sensor step Convective Heating；And transient state is acquired simultaneously
Thermocouple temperature in heat flow transducer rises data, and is conducted heat according to Semi-infinite One-dimensional body it is assumed that calculating input hot-fluid.According to this
Test result, it can be estimated that go out transient heat flow thermal response time of sensor and be less than 0.03 second.
In order to analyze the transient heat flow sensor test accuracy and application of the utility model, for three different heat
The electro-arc heater flow field trystate of flow horizontal, uses designed transient heat flow sensor and the plug amount as benchmark respectively
Heat meter carries out stationary point hot-fluid contrast test in same flow field position and identical test state status.As shown in table 1, contrast test knot
Fruit shows：Designed transient heat flow sensor can be applied to high hot-fluid experimental enviroment, and test relative deviation is less than 6%.
Table 1：Transient heat flow sensor heat flux measurement comparing result described in the utility model
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (10)
1. a kind of transient heat flow sensor, which is characterized in that including：
Calorimetric probe case body, it is internal that there is accommodating chamber；The head of the calorimetric probe case body is provided with to be connected with accommodating chamber
Logical receiving channel；
Heat flow transducer ontology is arranged in accommodating chamber, and the heat flow transducer ontology includes：
Oxygen-free copper thermal conductor, front end are arranged in receiving channel, and the center of the oxygen-free copper thermal conductor is provided with receiving and leads to
Hole；And the receiving opening increases close to its internal diameter of the position of oxygen-free copper thermal conductor front end；The oxygen-free copper thermal conductor passes through it
The mounting flange structure of upper setting is detachably connected in the accommodating chamber of calorimetric probe case body；
Dew type armoured thermocouple is held, oxygen-free copper thermal conductor is fixed on by the installation jackscrew for being arranged in oxygen-free copper thermal conductor end
Receiving opening in, and the temperature measuring point of end dew type armoured thermocouple is made to be in the center of oxygen-free copper thermal conductor receiving opening
And there is certain distance in the outlet port of its head distance receiving opening；
Fine silver plunger is arranged by way of casting or melting welding in the outlet port of oxygen-free copper thermal conductor receiving opening, and with
The head of dew type armoured thermocouple is held to form connection.
2. transient heat flow sensor as described in claim 1, which is characterized in that the calorimetric probe case body has rounded nose
Portion's structure.
3. transient heat flow sensor as described in claim 1, which is characterized in that the oxygen-free copper thermal conductor is diameter of phi
The internal diameter of the tubular structure of 3mm, overall length 11.7mm, the receiving opening of oxygen-free copper thermal conductor center is Φ
0.68mm；And the internal diameter of the receiving opening close to the position of oxygen-free copper thermal conductor front end increases to Φ 1mm.
4. transient heat flow sensor as described in claim 1, which is characterized in that the outer diameter of the end dew type armoured thermocouple is
Φ0.5mm；The distance of the outlet port of the head distance receiving opening of the end dew type armoured thermocouple is 0.3mm.
5. transient heat flow sensor as described in claim 1, which is characterized in that the end dew type armoured thermocouple is located at anaerobic
The part of copper thermal conductor rear end is fixedly connected by epoxide-resin glue with the rear end of oxygen-free copper thermal conductor.
6. transient heat flow sensor as described in claim 1, which is characterized in that the mounting flange on the oxygen-free copper thermal conductor
Structure is detachably connected on by M2 hexagon socket head cap screws in calorimetric probe case body.
7. transient heat flow sensor as claimed in claim 6, which is characterized in that the mounting flange knot of the oxygen-free copper thermal conductor
All it is arranged between structure and calorimetric probe case body and between M2 hexagon socket head cap screws and the mounting flange structure of oxygen-free copper thermal conductor
The mica spacer of 0.3mm thickness；The thickness of the mica spacer is 0.3mm.
8. transient heat flow sensor as described in claim 1, which is characterized in that the oxygen-free copper heat transfer being arranged in receiving channel
Body and calorimetric probe case side are to the gap magnesia powder for having the heat-insulated gap of the annular air of 0.1mm and front end face and water glass
Glass mixture seals.
9. transient heat flow sensor as described in claim 1, which is characterized in that a diameter of Φ of the mounting flange structure
16mm, thickness 3mm.
10. transient heat flow sensor as described in claim 1, which is characterized in that a diameter of Φ 1mm of the fine silver plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820351798.8U CN207850559U (en) | 2018-03-14 | 2018-03-14 | A kind of transient heat flow sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820351798.8U CN207850559U (en) | 2018-03-14 | 2018-03-14 | A kind of transient heat flow sensor |
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| CN207850559U true CN207850559U (en) | 2018-09-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344521A (en) * | 2018-03-14 | 2018-07-31 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of transient heat flow sensor |
| CN111562024A (en) * | 2020-05-21 | 2020-08-21 | 中国人民解放军国防科技大学 | Transient high-temperature field heat flux measuring device and method based on memory alloy |
-
2018
- 2018-03-14 CN CN201820351798.8U patent/CN207850559U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344521A (en) * | 2018-03-14 | 2018-07-31 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of transient heat flow sensor |
| CN108344521B (en) * | 2018-03-14 | 2024-04-16 | 中国空气动力研究与发展中心超高速空气动力研究所 | Transient heat flow sensor |
| CN111562024A (en) * | 2020-05-21 | 2020-08-21 | 中国人民解放军国防科技大学 | Transient high-temperature field heat flux measuring device and method based on memory alloy |
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