CN108956686A - A kind of measurement method of the real-time heat output of irregular solid wall surface - Google Patents
A kind of measurement method of the real-time heat output of irregular solid wall surface Download PDFInfo
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- CN108956686A CN108956686A CN201810695447.3A CN201810695447A CN108956686A CN 108956686 A CN108956686 A CN 108956686A CN 201810695447 A CN201810695447 A CN 201810695447A CN 108956686 A CN108956686 A CN 108956686A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
Abstract
The invention discloses a kind of measurement methods of irregular real-time heat output of solid wall surface, feature grid is divided in irregular solid wall surface, and the feature measuring point setting measurement patch in feature grid, the temperature information of measurement patch is acquired by infreared imaging device, data processing centre is transported to by data transmission device to be handled, and finally obtains the total heat output of the tested wall surface of entire testee.The present invention is based on non-contact infrared measuring principles, conventional method is avoided in device installation process to the destruction of testee wall surface and the temperature field of testee wall surface and the disturbance of heat flow field, it can adapt to the alternation influence of the flow condition, temperature and pressure of cavity type testee internal flow, the measurement range of heat flow density is extensive, and the measured value of maximum heat flow density can achieve 106The order of magnitude.
Description
Technical field
The present invention relates to winer construction technical fields, more particularly to a kind of survey of irregular real-time heat output of solid wall surface
Amount method.
Background technique
In many industrial productions and domestic life field, led more particularly, to the research in relation to Unsteady Heat Transfer coupled problem
The acquisition in domain, real-time heat output is received significant attention with measurement in every field such as industry spot, environmental protection and domestic lifes.
The acquisition modes of existing real-time heat output mainly pass through thermocouple measurement along hot-fluid direction of transfer at different distance
Temperature difference derive corresponding heat flow density, and then find out the heat output of research object.However since the presence of thermocouple is led
It causes inevitably to generate thermal contact resistance between testee and measuring cell, and the external environment of testee is generated dry
It disturbs.When particularly with testee being large area, irregular shape, the difficulty and cost of measurement are just higher.
In addition, if testee wall surface is influenced by the alternation of the flow condition of its internal flow, temperature and pressure simultaneously
And external environment condition parameter (temperature, humidity, wind speed etc.) collective effect and influence when, will to be related to complex parameters effect under it is non-
The acquisition of the heat flow density of steady state heat transfer coupled problem and real-time heat output brings great challenge.
Summary of the invention
The object of the present invention is to provide a kind of suitable large area, irregular solid wall surface heat flow density and real-time heat outputs
Measurement method can reach under complicated inside and outside portion's environmental activity, accurately, measure large area, irregular solid wall in real time
The purpose of the heat flow density in face and real-time heat output disturbs very little to testee, and application field is extensive.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of measurement method of real-time heat output of irregular solid wall surface, comprising the following steps:
Step 1: dividing feature grid；
Choosing irregular solid wall surface is tested wall surface, and the temperature point of the tested wall surface is measured by infreared imaging device
Cloth divides several features to the tested wall surface according to the shape feature of the feature of above-mentioned Temperature Distribution and the tested wall surface
Grid；
Step 2: the feature measuring point of selected feature grid；
Select representative position as feature measuring point in the feature grid in step 1, the feature is surveyed
Put the whole region for substituting the feature grid；
Step 3: production measurement patch；
Measurement patch is made using the different material of several thermal conductivities, the thermal conducting material shapes of several measurement patches and
Size is all the same；
Step 4: placing measurement patch；
The measurement patch is fitted tightly on the tested wall surface on the feature measuring point in each feature grid；
Step 5: obtaining the temperature parameter of feature measuring point；
The surface temperature in the different Heat Conduction Materials of the feature measuring point of different location is read by infreared imaging device
Ti1、Ti2……Tin；
Step 6: calculating the heat flow density at measurement patch；
Since the measurement patch is made of the Heat Conduction Material of several determination, and the thermal conductivity of various Heat Conduction Materials
λ1、λ2……λnIt is known that the emissivity ε of various Heat Conduction Materials1、ε2……εnIt is known that the consistency of thickness of Heat Conduction Material and be L,
The heat flow density q then obtained by the different Heat Conduction Materials of the measurement patchi1、qi2……qinIt is equal；
Since the heat flow density value of the different Heat Conduction Materials of the feature measuring point is equal, any two kinds are chosen according to formula 1
The heat flow density value of Heat Conduction Material calculates the temperature T of irregular solid wall surface at the feature measuring pointj, formula 1 is as follows:
It arranges: the tested wall surface temperature T at the feature measuring pointj:
Wherein, qi1、qi2The heat flow density of two kinds of Heat Conduction Materials in the respectively described measurement patch, unit is W/ ㎡；λ1、
λ2The thermal conductivity of two kinds of Heat Conduction Materials in the respectively described measurement patch, unit is W/m ˙ k；Ti1、Ti2The respectively described measurement
The surface temperature of two kinds of Heat Conduction Materials in patch, unit are DEG C；TjFor the two kinds of Heat Conduction Materials and quilt in the measurement patch
The bottom surface temperature that object fits closely is surveyed, unit is DEG C；L1、L2The thickness of two kinds of Heat Conduction Materials at the respectively described measuring point, two kinds
The consistency of thickness of Heat Conduction Material and uniformly, it may be assumed that L1=L2；Unit is m；
According to following formula 2, the heat flow density in the tested wall surface in any feature grid can be calculated, formula 2 is as follows:
Or
……
Or
Wherein, qi1、qi2……qinFor the calculated measuring point of Heat Conduction Material of several determination in the single measurement patch
Locate the heat flow density of the irregular solid wall surface, unit is W/ ㎡；λ1、λ2……λnIt is several at the respectively described measuring point to lead
The thermal conductivity of hot material, unit are W/m ˙ k；Ti1、Ti2……TinFor the surface temperature of several Heat Conduction Material at the measuring point,
Unit is DEG C；L1、L2……LnFor the thickness of several Heat Conduction Material at the measuring point, the consistency of thickness of each Heat Conduction Material and
It is even, unit m；
Step 7: calculating the total heat output Q of tested wall surface；
The heat flow density that the feature measuring point in different characteristic grid is calculated according to the formula 2 in step 6, according to
Lower formula 3 calculates the real-time heat output of any grid of tested wall surface, and formula 3 is as follows:
Qi=Ai·qi
Wherein, QiFor the heat output of this feature grid, unit W, AiFor the area of this feature grid, unit ㎡.
The total heat transfer of the 4 calculating each feature grids of testee wall surface, formula 4 are as follows according to the following formula:
Wherein, Q is the total heat transfer of each feature grid of testee wall surface, unit W；N is grid division
Number.
It preferably,, will be described according to the heterogeneity of the tested wall heat flux in the division feature grid of step 1
Feature grid is divided into the different grid of tightness degree；According to the style characteristic of the tested wall surface, the feature grid is drawn
It is divided into grid of different shapes；
Preferably, in the production measurement patch of step 3, the different material of thermal conductivity at least selects two or more；
Preferably, moderate soak material, the measurement are provided between the different material of thermal conductivity in the measurement patch
The side of patch is provided with side thermal insulation material；
Preferably, the side that the measurement patch is bonded with the tested wall surface is coated with heat conductive silica gel；
Preferably, in the heat flow density at the calculating measurement patch of step 6, according to several in the single measurement patch
The heat flow density q of the tested wall surface at the determining calculated measuring point of Heat Conduction Material of kindi1、qi2……qin, compare above-mentioned
Heat flow density qi1、qi2……qinNumerical value:
If all calculated heat flow density numerical value qi1、qi2……qinDeviation is all in the range of 2%~5%, then institute
It is effective to state measurement patch；
If calculated heat flow density qi1、qi2……qinDeviation in numerical value between 2/3rds or more numerical value is 2%
In the range of~5%, then the heat flow density value selection majority of the measuring point is as a result, the then measurement patch portion aging；
If calculated heat flow density qi1、qi2……qinThe deviation between numerical value in numerical value less than 2/3rds is 2%
In the range of~5%, then the measurement patch aging, needs to change the measurement patch.
The present invention achieves following technical effect compared with the existing technology:
1, the method for the present invention is based on non-contact infrared measuring principle, and it is right in device installation process to avoid conventional method
The destruction of testee wall surface and the temperature field of testee wall surface and the disturbance of heat flow field, at the same with traditional classical measurement method
It compares, is not necessarily to external cable, improves the precision, economy and applicability of measurement.
2, the method for the present invention can improve this according to the design feature and heat flux distribution flexible arrangement measuring point of measurand
The accuracy and application range of measurement method.
3, the method for the present invention is suitable for the measurement irregular solid wall surface of large area, and can be according to irregular solid wall surface
Shape and the flexible grid division of heat flux distribution, further improve the accuracy and application range of the measurement method.
4, the method for the invention can adapt to the flow condition of cavity type testee internal flow, temperature and pressure
Alternation influences, and adapts to external environment condition parameter (temperature, humidity, wind speed etc.) variation influence, has the characteristics that applied widely.
5, the method for the present invention, principle is simple, step is clear and is easily achieved, and the measurement range of heat flow density is extensive, maximum
The measured value of heat flow density can achieve 106The order of magnitude.
6, q of the inventioni1、qi2……qinThe heat flow density value that several difference Heat Conduction Material obtains can be checked mutually,
More accurate, effective data can be selected from several data, substantially increase the reliability of measuring point data and accurate
Degree；The measurement patch is spliced by several different Heat Conduction Materials simultaneously, and can be calculated according to every kind of Heat Conduction Material
The real-time heat output of testee out.In use, several be used as of flexible choice can have from several middle Heat Conduction Materials
The Heat Conduction Material of effect improves the service life of the patch measuring point.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the schematic diagram of the measurement method of the irregular real-time heat output of solid wall surface of the present invention；
Fig. 2 is the schematic diagram of the real-time heat transfer measuring device internal module of invention；
Fig. 3 is the schematic diagram of the infrared imaging module in the real-time heat transfer measuring device of invention；
Fig. 4 is the schematic diagram of invention cylindrical measurement patch；
Fig. 5 is the schematic diagram for inventing irregular solid wall surface；
Wherein, 1- testee, 2- measure patch, 3- infreared imaging device, 4- data transmission device, 5- Data processing
The heart, 6- heat conductive silica gel, 1-1- are tested wall surface, 1-2- grid lines, 1-3- cylindrical measurement patch, the side 2-1- thermal insulation material, 2-
2- laminating apparatus, 2-3- moderate soak material.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Embodiment 1:
As shown in Figs. 1-5, the present embodiment is the tool to the measurement method of the irregular real-time heat output of solid wall surface of the present invention
Body implementation process and working principle make further instructions.
As shown in Figure 1, a kind of measurement method of irregular real-time heat output of solid wall surface of the present embodiment, irregular solid
For testee 1, the wall surface of testee 1 is tested wall surface 1-1, the setting measurement patch 2 on tested wall surface 1-1, by red
The temperature information of the outer acquisition of imaging device 3 measurement patch 2, is transported at data processing centre 5 by data transmission device 4
Reason, finally obtains the total heat output of the tested wall surface 1-1 of entire testee 1.It is irregular that the present invention is suitable for measurement large area
Solid wall surface, and can be further improved according to the flexible grid division of shape and heat flux distribution of irregular solid wall surface
The accuracy and application range of the measurement method.
Specific measurement method the following steps are included:
S001: feature grid is divided；
As shown in figure 4, choosing irregular solid wall surface is tested wall surface 1-1, tested wall is measured by infreared imaging device 3
The Temperature Distribution of face 1-1 draws tested wall surface 1-1 according to the shape feature of the feature of above-mentioned Temperature Distribution and tested wall surface 1-1
Divide several feature grids；Since the Temperature Distribution for being tested wall surface 1-1 different zones is different, the area that different temperatures is distributed
Domain is separated by grid lines 1-2, and tested wall surface 1-1 is finally marked off to the feature grid of n different zones.
As shown in figure 5, feature grid is divided into tightness degree difference according to the heterogeneity of tested wall surface 1-1 hot-fluid
Grid；According to the style characteristic of tested wall surface 1-1, feature grid is divided into grid of different shapes；It is close journey in Fig. 5
Different triangular mesh is spent, the shape of certain grid can also be rectangle or polygon according to the actual situation.
S002: the feature measuring point of selected feature grid；
Select representative position as feature measuring point in feature grid in S001, feature measuring point is for substituting
The whole region of feature grid；The purpose of the feature measuring point of the present embodiment is that entire grid regions can be represented in selected characteristic grid
The point of domain temperature is prepared for subsequent heat transfer acquisition.The above method can be according to the design feature and hot-fluid of measurand point
Cloth flexible arrangement measuring point improves the accuracy and application range of the measurement method.
S003: production measurement patch；
Such as Fig. 3, the measurement patch 2 of the present embodiment uses three biggish materials of thermal conductivity difference, specifically can for aluminium,
Cylindrical measurement patch 1-3 is made in these three materials by stainless steel and red copper, and the thickness of every kind of material is identical, shapes and sizes
Also identical, it is 120 ° of sector.
Moderate soak material 2-3 is additionally provided among three Heat Conduction Materials, moderate soak material 2-3 here is by three kinds
Heat Conduction Material separates, and guarantees that three kinds of Heat Conduction Materials are mutually insulated；Pass through side thermal insulating material in the side of cylindrical measurement patch 1-3
Expect that 2-1 cladding is got up, guarantees the hot-fluid only axial one-dimensional transmitting of edge measurement patch 2, while in the periphery cylindrical measurement patch 1-3 cloth
Laminating apparatus 2-2 is set, to guarantee that cylindrical measurement patch 1-3 can be closely placed on testee 1, when testee 1 is
When steel air accumulator, laminating apparatus 2-2 here can be magnet ring.
S004: measurement patch is placed；
As shown in Fig. 2, measurement patch 2 is fitted tightly over the feature measuring point on tested wall surface 1-1 in each feature grid
On；The cylindrical measurement patch 1-3 of the present embodiment will guarantee the axial direction and feature measuring point of cylindrical measurement patch 1-3 when pasting
Locate that irregular solid wall surface is vertical, and smears thermal conductive silicon between 1 wall surface of the bottom surface of cylindrical measurement patch 1-3 and testee
Glue 6 to reduce the thermal contact resistance between cylindrical measurement patch 1-3 and tested wall surface 1-1, and then obtains tested wall surface 1-1's
Practical heat output.
S005: the temperature parameter of feature measuring point is obtained；
The surface temperature T of three kinds of Heat Conduction Materials of cylindrical measurement patch 1-3 is measured using infreared imaging device 3i1、Ti2、
Ti3.Based on non-contact infrared measuring principle, avoids conventional method and 1 wall surface of testee is broken in device installation process
Bad and the temperature field of 1 wall surface of testee and the disturbance of heat flow field, while compared with traditional classical measurement method, it is not necessarily to external electricity
Cable improves the precision, economy and applicability of measurement.
S006: the heat flow density at measurement patch is calculated；
The data of acquisition are real-time transmitted to data processing centre 5 by data transmission device 4 in S005, pass through data
Processing center 5 to data carry out processing calculate analysis, thus obtain testee 1 heat flow density and real-time heat output.
The calculation and analysis method of above-mentioned data specifically includes following procedure:
Since cylindrical measurement patch 1-3 is made of three kinds of determining Heat Conduction Materials, and the thermal conductivity of various Heat Conduction Materials
Rate λ1、λ2、λ3It is known that the emissivity ε of various Heat Conduction Materials1、ε2、ε3It is known that the consistency of thickness of Heat Conduction Material and be L, then lead to
Cross the heat flow density q that the different Heat Conduction Materials of cylindrical measurement patch 1-3 obtaini1、qi2、qi3It is equal；
Due to feature measuring point different Heat Conduction Materials heat flow density value it is equal, according to formula 1 choose any two kinds it is thermally conductive
The heat flow density value of material calculates the temperature T of irregular solid wall surface at feature measuring pointj, formula 1 is as follows:
It arranges: the tested wall surface 1-1 temperature T at feature measuring pointj:
Wherein, qi1、qi2The heat flow density of two kinds of Heat Conduction Materials in respectively cylindrical measurement patch 1-3, unit W/
㎡；λ1、λ2The thermal conductivity of two kinds of Heat Conduction Materials in respectively cylindrical measurement patch 1-3, unit are W/m ˙ k；Ti1、Ti2Respectively
For the surface temperature of two kinds of Heat Conduction Materials in cylindrical measurement patch 1-3, unit is DEG C；TjFor cylindrical measurement patch 1-3
In two kinds of Heat Conduction Materials and the bottom surface temperature that fits closely of testee 1, unit be DEG C；L1、L2It is led for two kinds respectively at measuring point
The thickness of hot material, the consistency of thickness of two kinds of Heat Conduction Materials and uniformly, it may be assumed that L1=L2；Unit is m；
According to following formula 2, the heat flow density in tested wall surface 1-1 in any feature grid can be calculated, formula 2 is as follows:
Or
……
Or
Wherein, qi1、qi2、qi3For three kinds of calculated measuring points of determining Heat Conduction Material in single cylindrical measurement patch 1-3
Locate the heat flow density of irregular solid wall surface, unit is W/ ㎡；λ1、λ2、λ3The thermal conductivity of three various Heat Conduction Materials respectively at measuring point
Rate, unit are W/m ˙ k；Ti1、Ti2……TinFor the surface temperature of three kinds of Heat Conduction Materials at measuring point, unit is DEG C；L1、L2、L3For
The thickness of three kinds of Heat Conduction Materials at measuring point, the consistency of thickness of each Heat Conduction Material and uniform, unit m.
Whether effective it may be used to determine cylindrical measurement patch 1-3 according to above-mentioned Computing Principle.
Because calculating in the heat flow density at measurement patch 2, according to the heat conduction material of determination several in single-measurement patch 2
Expect the heat flow density q that wall surface 1-1 is tested at calculated measuring pointi1、qi2……qin, compare above-mentioned heat flow density qi1、qi2……
qinNumerical value:
If all calculated heat flow density numerical value qi1、qi2……qinDeviation all in the range of 2%~5%, is then surveyed
It is effective to measure patch 2；
If calculated heat flow density qi1、qi2……qinDeviation in numerical value between 2/3rds or more numerical value is 2%
In the range of~5%, then the heat flow density value selection majority of measuring point is as a result, then measure 2 part aging of patch；
If calculated heat flow density qi1、qi2……qinThe deviation between numerical value in numerical value less than 2/3rds is 2%
In the range of~5%, then 2 aging of patch is measured, needs to change measurement patch 2.
Only all calculated heat flow density numerical value qi1、qi2、qi3Deviation all in the range of 2%~5%, is then justified
Cylinder measurement patch 1-3 is effective, can continue to calculate the data that cylindrical measurement patch 1-3 is obtained.
Q of the inventioni1、qi2……qinThe heat flow density value that several difference Heat Conduction Material obtains can be checked mutually, energy
It is enough that more accurate, effective data are selected from several data, substantially increase the reliability and accuracy of measuring point data；
The measurement patch 2 is spliced by several different Heat Conduction Materials simultaneously, and can be calculated according to every kind of Heat Conduction Material
The real-time heat output of testee 1.In use, can from several middle Heat Conduction Materials flexible choice it is several as effective
Heat Conduction Material, improve the service life of the patch measuring point
S007: the total heat output Q of tested wall surface 1-1 is calculated；
The heat flow density that the feature measuring point in different characteristic grid is calculated according to the formula 2 in S006, according to following public affairs
Formula 3 calculates the real-time heat output of the tested any grid of wall surface 1-1, and formula 3 is as follows:
Qi=Ai·qi
Wherein, QiFor the heat output of this feature grid, unit W, AiFor the area of this feature grid, unit ㎡.
The total heat transfer of the 4 calculating each feature grids of 1 wall surface of testee, formula 4 are as follows according to the following formula:
Wherein, Q is the total heat transfer of each feature grid of 1 wall surface of testee, unit W；N is of grid division
Number.
A kind of measurement method of irregular real-time heat output of solid wall surface of the invention can adapt to cavity type testee
The alternation influence of the flow condition, temperature and pressure of internal flow, and adapt to external environment condition parameter (temperature, humidity, wind speed
Deng) variation influence, have the characteristics that it is applied widely, and principle is simple, step clearly and be easily achieved, heat flow density
Measurement range is extensive, and the measured value of maximum heat flow density can achieve 106The order of magnitude.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (6)
1. a kind of measurement method of the real-time heat output of irregular solid wall surface, it is characterised in that: the following steps are included:
Step 1: dividing feature grid；
Choosing irregular solid wall surface is tested wall surface, and the Temperature Distribution of the tested wall surface is measured by infreared imaging device,
Several feature nets are divided to the tested wall surface according to the shape feature of the feature of above-mentioned Temperature Distribution and the tested wall surface
Lattice；
Step 2: the feature measuring point of selected feature grid；
Select representative position as feature measuring point in the feature grid in step 1, the feature measuring point is used
In the whole region for substituting the feature grid；
Step 3: production measurement patch；
Measurement patch, the thermal conducting material shapes and sizes of several measurement patches are made using the different material of several thermal conductivities
It is all the same；
Step 4: placing measurement patch；
The measurement patch is fitted tightly on the tested wall surface on the feature measuring point in each feature grid；
Step 5: obtaining the temperature parameter of feature measuring point；
The surface temperature T in the different Heat Conduction Materials of the feature measuring point of different location is read by infreared imaging devicei1、
Ti2……Tin；
Step 6: calculating the heat flow density at measurement patch；
Since the measurement patch is made of the Heat Conduction Material of several determination, and the thermal conductivity λ of various Heat Conduction Materials1、
λ2……λnIt is known that the emissivity ε of various Heat Conduction Materials1、ε2……εnIt is known that the consistency of thickness of Heat Conduction Material and be L, then lead to
Cross the heat flow density q that the different Heat Conduction Materials of the measurement patch obtaini1、qi2……qinIt is equal；
Due to the feature measuring point different Heat Conduction Materials heat flow density value it is equal, according to formula 1 choose any two kinds it is thermally conductive
The heat flow density value of material calculates the temperature T of irregular solid wall surface at the feature measuring pointj, formula 1 is as follows:
It arranges: the tested wall surface temperature T at the feature measuring pointj:
Wherein, qi1、qi2The heat flow density of two kinds of Heat Conduction Materials in the respectively described measurement patch, unit is W/ ㎡；λ1、λ2Point
Not Wei it is described measurement patch in two kinds of Heat Conduction Materials thermal conductivity, unit be W/m ˙ k；Ti1、Ti2The respectively described measurement patch
In two kinds of Heat Conduction Materials surface temperature, unit be DEG C；TjFor the two kinds of Heat Conduction Materials and measured object in the measurement patch
The bottom surface temperature that body fits closely, unit are DEG C；L1、L2The thickness of two kinds of Heat Conduction Materials at the respectively described measuring point, two kinds thermally conductive
The consistency of thickness of material and uniformly, it may be assumed that L1=L2；Unit is m；
According to following formula 2, the heat flow density in the tested wall surface in any feature grid can be calculated, formula 2 is as follows:
Or
……
Or
Wherein, qi1、qi2……qinFor the calculated measuring point place of Heat Conduction Material of several determination in the single measurement patch
The heat flow density of irregular solid wall surface is stated, unit is W/ ㎡；λ1、λ2……λnSeveral heat conduction material at the respectively described measuring point
The thermal conductivity of material, unit are W/m ˙ k；Ti1、Ti2……TinFor the surface temperature of several Heat Conduction Material at the measuring point, unit
For DEG C；L1、L2……LnFor the thickness of several Heat Conduction Material at the measuring point, the consistency of thickness of each Heat Conduction Material and uniform, list
Position is m.
Step 7: calculating the total heat output Q of tested wall surface；
The heat flow density that the feature measuring point in different characteristic grid is calculated according to the formula 2 in step 6, according to following public affairs
Formula 3 calculates the real-time heat output of any grid of tested wall surface, and formula 3 is as follows:
Qi=Ai·qi
Wherein, QiFor the heat output of this feature grid, unit W, AiFor the area of this feature grid, unit ㎡.
The total heat transfer of the 4 calculating each feature grids of testee wall surface, formula 4 are as follows according to the following formula:
Wherein, Q is the total heat transfer of each feature grid of testee wall surface, unit W；N is the number of grid division.
2. the measurement method of the real-time heat output of irregular solid wall surface according to claim 1, it is characterised in that: in step
In 1 division feature grid, according to the heterogeneity of the tested wall heat flux, the feature grid is divided into tightness degree
Different grids；According to the style characteristic of the tested wall surface, the feature grid is divided into grid of different shapes.
3. the measurement method of the real-time heat output of irregular solid wall surface according to claim 1, it is characterised in that: in step
In 3 production measurement patch, the different material of thermal conductivity at least selects two or more.
4. the measurement method of the real-time heat output of irregular solid wall surface according to claim 3, it is characterised in that: the survey
Moderate soak material is provided in amount patch between the different material of thermal conductivity, the side of the measurement patch is provided with side guarantor
Adiabator.
5. the measurement method of the real-time heat output of irregular solid wall surface according to claim 4, it is characterised in that: the survey
The side that amount patch is bonded with the tested wall surface is coated with heat conductive silica gel.
6. the measurement method of the real-time heat output of irregular solid wall surface according to claim 1, it is characterised in that: in step
In heat flow density at 6 calculating measurement patch, calculated according to the Heat Conduction Material of several determination in the single measurement patch
The heat flow density q of the tested wall surface at the measuring point outi1、qi2……qin, compare above-mentioned heat flow density qi1、qi2……qin
Numerical value:
If all calculated heat flow density numerical value qi1、qi2……qinDeviation is all in the range of 2%~5%, then the survey
It is effective to measure patch；
If calculated heat flow density qi1、qi2……qinDeviation in numerical value between 2/3rds or more numerical value 2%~
In the range of 5%, then the heat flow density value selection majority of the measuring point is as a result, the then measurement patch portion aging；
If calculated heat flow density qi1、qi2……qinThe deviation between numerical value in numerical value less than 2/3rds 2%~
In the range of 5%, then the measurement patch aging, needs to change the measurement patch.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709139A (en) * | 2019-01-07 | 2019-05-03 | 福建省产品质量检验研究院 | A kind of method of the irregular foam plastic product thermal coefficient of quick test |
| CN113567500A (en) * | 2021-08-21 | 2021-10-29 | 福州大学 | Delay detection method for transient electromagnetic thermal effect of metal buried crack tip under action of pulse current |
| CN115544818A (en) * | 2022-12-05 | 2022-12-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Grid division and heat conduction calculation method for multilayer heterogeneous thin-wall solid heat conduction calculation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580095A (en) * | 1991-09-18 | 1993-03-30 | Hitachi Ltd | Inspecting apparatus of resistance element |
| WO2011128927A3 (en) * | 2010-04-16 | 2012-01-05 | Ermanno Grinzato | Measuring thermal parameters of a building envelope |
| CN105424972A (en) * | 2016-01-08 | 2016-03-23 | 吉林大学 | Near wall surface flow velocity measuring method and apparatus |
| CN205228682U (en) * | 2015-10-19 | 2016-05-11 | 青岛佳科恒业能源科技股份有限公司 | Ultrasonic wave calorimeter based on pressure gauge |
| CN108151885A (en) * | 2017-12-15 | 2018-06-12 | 湖南科技大学 | Non-circular profile Work piece high-speed grinding temperature Forecasting Methodology based on variable heat source model |
-
2018
- 2018-06-29 CN CN201810695447.3A patent/CN108956686B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580095A (en) * | 1991-09-18 | 1993-03-30 | Hitachi Ltd | Inspecting apparatus of resistance element |
| WO2011128927A3 (en) * | 2010-04-16 | 2012-01-05 | Ermanno Grinzato | Measuring thermal parameters of a building envelope |
| CN205228682U (en) * | 2015-10-19 | 2016-05-11 | 青岛佳科恒业能源科技股份有限公司 | Ultrasonic wave calorimeter based on pressure gauge |
| CN105424972A (en) * | 2016-01-08 | 2016-03-23 | 吉林大学 | Near wall surface flow velocity measuring method and apparatus |
| CN108151885A (en) * | 2017-12-15 | 2018-06-12 | 湖南科技大学 | Non-circular profile Work piece high-speed grinding temperature Forecasting Methodology based on variable heat source model |
Non-Patent Citations (3)
| Title |
|---|
| 毛羽丰等: "基于红外热成像的热流分布测量技术", 《红外与激光工程》 * |
| 端震 等: "微管道内壁面轴向热流实验研究", 《南京师范大学学报(工程技术版)》 * |
| 陈书旺等: "地下管道的红外成像检测法", 《大珩先生九十华诞文集暨中国光学学会 2004年学术大会论文集》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709139A (en) * | 2019-01-07 | 2019-05-03 | 福建省产品质量检验研究院 | A kind of method of the irregular foam plastic product thermal coefficient of quick test |
| CN113567500A (en) * | 2021-08-21 | 2021-10-29 | 福州大学 | Delay detection method for transient electromagnetic thermal effect of metal buried crack tip under action of pulse current |
| CN115544818A (en) * | 2022-12-05 | 2022-12-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Grid division and heat conduction calculation method for multilayer heterogeneous thin-wall solid heat conduction calculation |
| CN115544818B (en) * | 2022-12-05 | 2023-02-28 | 中国空气动力研究与发展中心低速空气动力研究所 | Grid division and heat conduction calculation method for multilayer heterogeneous thin-wall solid heat conduction calculation |
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