CN108982303B - Method and device for acquiring residence characteristic of liquid substance on material surface - Google Patents
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- 239000007788 liquid Substances 0.000 title claims abstract description 95
- 239000000463 material Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 68
- 239000000126 substance Substances 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 claims abstract description 156
- 238000002679 ablation Methods 0.000 claims abstract description 49
- 230000008569 process Effects 0.000 claims abstract description 37
- 230000008859 change Effects 0.000 claims abstract description 27
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 239000011204 carbon fibre-reinforced silicon carbide Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 229910052681 coesite Inorganic materials 0.000 description 9
- 229910052906 cristobalite Inorganic materials 0.000 description 9
- 239000000377 silicon dioxide Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 229910052682 stishovite Inorganic materials 0.000 description 9
- 229910052905 tridymite Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000001028 reflection method Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- 238000007619 statistical method Methods 0.000 description 1
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- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
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Abstract
The disclosure relates to a method and a device for acquiring residence characteristics of liquid substances on the surface of a material, wherein the method comprises the following steps: acquiring a plurality of images of the surface of a first test piece in the process of ablation of the first test piece; and obtaining the change characteristics of the amount of the liquid drops residing on the surface of the first test piece along with the ablation time from the obtained plurality of images to obtain the residence characteristic of the liquid substance on the surface of the first test piece. According to the method for acquiring the residence characteristic of the liquid substance on the surface of the material, the residence characteristic of the liquid substance on the surface of the material is represented according to the change characteristic of the drop volume presented in the image of the acquired test piece in the ablation process, the residence characteristic of the liquid substance on the surface of the material can be quantified, and the residence characteristics corresponding to different materials can be conveniently measured.
Description
Technical Field
The disclosure relates to the technical field of materials, and in particular relates to a method and a device for acquiring residence characteristics of a liquid substance on a material surface.
Background
The composite material is widely applied to the fields of aerospace, nuclear energy and the like due to good mechanical property and high temperature resistance. In an aerospace hypersonic aircraft structural material, the aerodynamic heat experienced by the exterior of the aircraft increases as the speed of the aircraft increases. In the case of hypersonic flight, the structural material of the aircraft surface oxidizes as a result of being ablated pneumatically. Generally, in order to simulate the high-altitude and ultra-high-speed flight environment of an aircraft, a high-temperature wind tunnel is adopted to test the high-temperature resistance of the aircraft structural material. During the ablation process, new species are generated on the surface of the material. Taking C/SiC, SiC and other materials as examples, the surface of the material can be accompanied by gaseous CO and liquid SiO in the ablation process2Etc. are generated. In one aspect, the resulting liquid SiO2The defects such as pores, cracks and the like on the surface of the material can be sealed and filled; on the other hand, since oxygen is in liquid SiO2Has a very low diffusion rate, and thus liquid SiO2Can well isolate the contact between oxygen and the matrix and reduce the rate of oxidation ablation reaction. However, in the actual ablation process, due to the scouring effect of the high-speed air flow, the generated liquid SiO2Will be washed away from the surface of the material in a short time to weaken the liquid SiO2The oxygen barrier effect of (1).
The reasonable micro-structural design of the material surface can reduce the flow scouring rate of the liquid substance on the material surface, so that the liquid substance is remained on the material surface to play a role in protecting the material matrix. However, because the microstructure of the surface of the material has many kinds and different parameters, it is difficult to uniformly characterize the influence of the microstructure of the surface of the material on the residence property of the liquid substance on the surface of the material, and a measure for researching the residence property of the liquid substance on the surface of the material needs to be provided.
Disclosure of Invention
In view of this, the present disclosure provides a method and an apparatus for obtaining a residence characteristic of a liquid substance on a material surface, so as to solve the problem in the related art that it is difficult to characterize the residence characteristic of the liquid substance on the material surface.
According to a first aspect of the present disclosure, a method for obtaining the residence property of a liquid substance on the surface of a material is used, comprising: acquiring a plurality of images of the surface of a first test piece in the process of ablation of the first test piece; and acquiring a change characteristic of the amount of the liquid drops residing on the surface of the first test piece along with the ablation time from the plurality of images to obtain a residence characteristic of the liquid substance on the surface of the first test piece, wherein the residence characteristic represents the change of the amount of the liquid substance residing on the surface of the first test piece along with the ablation time, which is generated in the process that the first test piece is ablated.
Optionally, the obtaining, from the plurality of images, a change characteristic of the amount of droplets residing on the surface of the first test piece as a function of ablation time includes: and acquiring the variation of the proportion of the area of the first test piece covered by the resident liquid drop on the surface of the first test piece to the surface area of the first test piece along with the ablation time.
Optionally, the method further comprises: and in the process that the test piece is ablated, blue light is used as an incident light source to irradiate the surface of the first test piece.
Optionally, the acquiring the image of the surface of the first test piece includes: and acquiring an image of the surface of the first test piece after the image is filtered by a filter, wherein the filter is used for filtering the radiant light generated by the first test piece in the oxidation process.
Optionally, the method further comprises: acquiring the residence characteristics corresponding to at least two test pieces with different surface microstructures; determining the relationship between the surface microstructure parameters of the test piece and the residence characteristics according to the residence characteristics corresponding to the at least two test pieces; based on the relationship, the dwell characteristic of the second test piece is evaluated in accordance with surface microstructure parameters of the second test piece.
Optionally, the method further comprises: the first test piece and the second test piece are made of C/SiC composite materials.
According to a second aspect of the present disclosure, there is provided an apparatus for obtaining a property of a liquid substance residing on a surface of a material, comprising: the first acquisition module is used for acquiring a plurality of images of the surface of a first test piece in the ablation process of the first test piece; and the second acquisition module is used for acquiring the change characteristic of the amount of the liquid drops residing on the surface of the first test piece along with the ablation time from the plurality of images to obtain the residence characteristic of the liquid substance on the surface of the first test piece, wherein the residence characteristic represents the change of the amount of the liquid substance residing on the surface of the first test piece along with the ablation time, which is generated in the process that the first test piece is ablated.
Optionally, the second obtaining module is configured to: and acquiring the variation of the proportion of the area of the first test piece covered by the resident liquid drop on the surface of the first test piece to the surface area of the first test piece along with the ablation time.
Optionally, the first obtaining module is configured to: and acquiring an image of the surface of the first test piece after the image is filtered by a filter, wherein the filter is used for filtering the radiant light generated by the first test piece in the oxidation process.
Optionally, the apparatus further comprises: the third acquisition module is used for acquiring the residence characteristics corresponding to at least two test pieces with different surface microstructures; the determining module is used for determining the relationship between the surface microstructure parameters of the test piece and the residence characteristics according to the residence characteristics corresponding to the at least two test pieces; and the evaluation module is used for evaluating the residence characteristic of the second test piece according to the surface microstructure parameter of the second test piece based on the relationship.
According to the method for acquiring the residence characteristic of the liquid substance on the surface of the material, the residence characteristic of the liquid substance on the surface of the material is represented according to the change characteristic of the drop volume presented in the image acquired by the test piece in the ablation process, the residence characteristic of the liquid substance on the surface of the material can be quantified, and the residence characteristics corresponding to different materials can be conveniently measured.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a flow chart illustrating a method for obtaining a property of residence of a liquid substance on a material surface, according to an exemplary embodiment;
FIG. 2 is a schematic illustration of a test piece surface droplet distribution shown in accordance with an exemplary embodiment;
FIG. 3 is a flow chart illustrating a method for obtaining a property of residence of a liquid substance on a material surface, according to an exemplary embodiment;
FIG. 4 is a block diagram illustrating an apparatus for obtaining a property of a liquid substance residing on a surface of a material, according to an exemplary embodiment.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
Experimental observations have found that not every droplet increases in volume as the material is ablated to increase in volume of its surface droplet. In fact, the reason for the increased drop volume is to "absorb" the smaller volume of the surrounding drop. In the experiment, the liquid drops with smaller volume continuously contact with the surrounding liquid drops and are quickly fused by the liquid drops with larger volume, and finally, the volume of the liquid drops with larger volume is further increased. Obviously, the merging and enlarging process of the droplets has a direct influence on the flow behavior of the droplets during the ablation process, i.e., the increase of the volume of the droplets and the morphology of the droplets directly influence the flow evolution behavior of the droplets in the material surface flow field. Based on the mechanism of the process, a basis is provided for further research on microstructure design of the surface of the material so as to regulate and control the distribution of the liquid drops on the surface of the test piece.
Based on the above analysis, a method for obtaining the residence property of the liquid substance on the surface of the material is provided.
Fig. 1 is a flow chart illustrating a method for obtaining a residence property of a liquid substance on a material surface, according to an exemplary embodiment, as shown in fig. 1, the method includes the steps of:
step 101: acquiring a plurality of images of the surface of a first test piece in the ablation process;
the first test piece is a test piece made of a certain material, and the first test piece is used as an example in the embodiment to test the residence characteristic corresponding to the material. Wherein, the residence characteristic is used for representing the change of the amount of liquid substances generated in the process of ablating the material, which reside on the surface of the material, along with the ablation time.
In this step 101, a plurality of images of the surface of the test piece may be acquired periodically at fixed time intervals during the ablation of the test piece.
For example, the test piece may be placed in a high temperature wind tunnel for ablation.
Step 102: and obtaining the change characteristics of the amount of the liquid drops residing on the surface of the first test piece along with the ablation time from the obtained plurality of images to obtain the residence characteristic of the liquid substance on the surface of the first test piece. Wherein the residence characteristic represents the change of the amount of the liquid substance generated in the process of ablating the first test piece, which resides on the surface of the first test piece, along with the ablation time.
According to the method for acquiring the residence characteristic of the liquid substance on the surface of the material, the residence characteristic of the liquid substance on the surface of the material is represented according to the change characteristic of the drop amount presented in the image of the acquired test piece in the ablation process, and the residence characteristic reflects the change quantity of the liquid substance on the surface of the material generated in the ablation process of the material, so that the residence characteristic of the liquid substance on the surface of the material is quantized, and the residence characteristics corresponding to different materials are conveniently measured.
In one implementation, the step of obtaining from the plurality of images a change characteristic of the volume of the droplet residing on the surface of the first test piece as a function of ablation time may include: and acquiring the variation of the proportion of the area of the first test piece covered by the resident liquid drop on the surface of the first test piece to the surface area of the first test piece along with the ablation time. Illustratively, this change may be presented using a graph to make the change more intuitive.
In one implementation, the test piece is a solid material, illustratively a C/SiC composite, having dimensions of, for example, 50mm by 10 mm. The high-temperature wind tunnel for ablating the test piece can adopt a high-temperature wind tunnel with 50MW electric arc. In the ablation process of the C/SiC composite material, because of a series of chemical reactions such as oxidation and the like, chemical components are changed to generate liquid SiO2Droplets, and the like. Using C/SiC material and SiO2Droplet pair blue lightThe different characteristics of reflection and absorption intensity can utilize the blue light reflection method to obtain the image data of the liquid drop generated by oxidation in the ablation process of the test piece. Namely, under the irradiation of blue light, due to the C/SiC material and SiO2Difference of reflection and absorption intensity of liquid drops to blue light, surface of C/SiC material and SiO2The brightness of the droplets is different, so that SiO adheres to the droplets2SiO can be clearly observed on the surface of the C/SiC material of the liquid drop2The liquid drop can detect the image data of the liquid drop generated by oxidation in the ablation process of the test piece in real time. Based on the principle, in another implementation mode, the method for acquiring the residence property of the liquid substance on the surface of the material further comprises the following steps: and in the process that the test piece is ablated, blue light is used as an incident light source to irradiate the surface of the first test piece, and the distribution condition of liquid drops is presented in the obtained image.
In one implementation, the step of obtaining an image of a surface of a first test piece includes: and acquiring an image of the surface of the first test piece after the surface is filtered by the filter plate, wherein the filter plate is used for filtering the radiant light generated by the first test piece in the oxidation process so as to ensure that the light received by the image acquisition device is completely provided by the blue light source. For example, a high-speed camera may be used as an image capture device to capture an image of the surface of the first specimen.
In another implementation, the method for obtaining the residence property of the liquid substance on the surface of the material further comprises: obtaining corresponding residence characteristics of at least two test pieces with different surface microstructures; determining the relationship between the surface microstructure parameters and the residence characteristics of the test piece according to the residence characteristics corresponding to the at least two test pieces; based on the relationship, the dwell characteristic of the second test piece is evaluated in accordance with the surface microstructure parameter of the second test piece. The surface microstructure parameters of the test piece can include groove depth, groove width or amplitude, period and the like of the material surface. For example, the correlation between the groove depth and the groove width of the test piece and the dwell characteristic can be respectively obtained according to the relationship between the surface microstructure of the test piece and the dwell characteristic, for example, the groove depth and the dwell characteristic are positive correlation or negative correlation. The influence of the trench depth and the trench width on the residence characteristic can be obtained based on experimental tests, and the constant influence factors corresponding to the trench depth and the trench width are respectively estimated. And then, a calculation formula of the residence property is obtained by using the correlation and the constant influence factor. After obtaining the calculation formula, the residence characteristics corresponding to the material can be evaluated under the condition that the groove width and the groove depth corresponding to the surface microstructure of the material are known. The present disclosure does not limit the specific form of the above-described relationship. For example, the second test piece and the first test piece may be both C/SiC composite materials.
Fig. 2 is a schematic diagram of droplet distribution on the surface of a test piece according to an exemplary embodiment, where the schematic diagram is a schematic diagram of droplet distribution on the surface of the test piece obtained for one of a plurality of acquired images, and a description is given here only by taking the schematic diagram as an example of a statistical method for droplets. Wherein 21 is the surface of the test piece, 22 is the liquid drop extracted from the surface, and 23 is the distribution statistical curve of the liquid drop along the airflow direction, which is obtained by counting the liquid drop amount on the surface of the test piece along the airflow direction, and represents the change of the liquid drop amount along the airflow direction. In the process of ablating the test piece, the surface of the test piece is damaged, a concave area is generated, liquid drops are more easily gathered in the concave area, and therefore the liquid drops in the direction vertical to the surface of the test piece need to be counted. Based on the acquired multiple images of the test piece surface with time sequence, the total droplet volume on the test piece surface can be counted along the air flow direction, such as the direction indicated by the arrow in fig. 2, and the direction perpendicular to the air flow direction (i.e., the direction perpendicular to the test piece surface) shown in fig. 2, and then the residence characteristic of the test piece can be determined according to the variation of the total droplet volume along with the ablation time.
Fig. 3 is a flow chart illustrating a method for obtaining a property of residence of a liquid substance on a material surface, according to an exemplary embodiment, as shown in fig. 3, the method comprising the steps of:
step 301: and placing the tested material test piece in a high-temperature wind tunnel, and starting the high-temperature wind tunnel to ablate the material test piece.
The tested material test piece is an example of the first test piece.
Step 302: irradiating the tested material test piece by using blue light in the process of ablating the tested material test piece, and obtaining original image data of the liquid drop distribution of the tested material test piece by a blue light reflection method;
step 303: threshold value extraction, background removal, rapid median filtering, gray gradient calculation and boundary extraction processing are carried out on original image data to obtain a liquid drop distribution image of the surface of the detected material, and the distribution condition of liquid drops on the surface of the detected material can be clearly shown in the image;
step 304: counting the amount of the liquid drops along the direction of the air flow and the direction vertical to the air flow based on the liquid drop distribution image on the surface of the detected material;
step 305: determining the ratio of the total drop volume to the surface area of the whole material to be detected, which is obtained through statistics, obtaining a dynamic area ratio change characteristic according to the time sequence of image data, and analyzing the residence effect of the microstructure on the surface of the material to be detected on the drop based on the change characteristic so as to evaluate the residence characteristic of the liquid substance on the surface of the material with different microstructures on line in real time.
Fig. 4 is a block diagram of an apparatus for obtaining a property of a liquid substance residing on a material surface according to an exemplary embodiment, as shown in fig. 4, the apparatus 40 includes the following components:
a first acquisition module 41, configured to acquire a plurality of images of a surface of a first test piece during ablation of the first test piece;
and the second acquiring module 42 is used for acquiring the change characteristic of the amount of the liquid drops remained on the surface of the first test piece along with the ablation time from the plurality of images to obtain the residence characteristic of the liquid substance on the surface of the first test piece, wherein the residence characteristic represents the change of the amount of the liquid substance remained on the surface of the first test piece along with the ablation time during the ablation process of the first test piece.
In one implementation, the second obtaining module 42 is configured to: and acquiring the variation of the proportion of the area of the first test piece covered by the resident liquid drop on the surface of the first test piece to the surface area of the first test piece along with the ablation time.
In one implementation, the first obtaining module is configured to: and acquiring an image of the surface of the first test piece after being filtered by the filter plate, wherein the filter plate is used for filtering the radiant light generated by the first test piece in the oxidation process.
In one implementation, the device for obtaining the property of residence of the liquid substance on the surface of the material further comprises: the third acquisition module is used for acquiring the corresponding residence characteristics of at least two test pieces with different surface microstructures; the determining module is used for determining the relationship between the surface microstructure parameters and the residence characteristics of the test piece according to the residence characteristics corresponding to at least two test pieces; and the evaluation module is used for evaluating the residence characteristic of the second test piece according to the surface microstructure parameter of the second test piece based on the relationship.
According to the scheme of the embodiment of the disclosure, the residence characteristic of the liquid substance on the surface of the material is represented according to the change characteristic of the drop volume on the surface of the test piece, which is shown in the image of the test piece in the ablation process, so that the residence characteristic of the liquid substance on the surface of the material can be quantified, and the residence characteristics corresponding to different materials can be conveniently measured. Since different microstructures on the surface of the material have certain influence on the residence property of the liquid substance, the residence property corresponding to the material with different microstructures can be evaluated based on the quantified residence property. On the premise of effectively regulating and controlling the liquid drop distribution according to the corresponding residence characteristic of the material, the liquid substance can be effectively utilized to isolate the outside air, the oxidation ablation rate of the material is reduced, and the oxidation ablation resistance of the material is improved.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. A method for acquiring the retention characteristic of a liquid substance on the surface of a material is characterized by comprising the following steps:
acquiring a plurality of images of the surface of a first test piece in the process of ablation of the first test piece;
obtaining the change characteristics of the amount of the liquid drops remained on the surface of the first test piece along with the ablation time from the plurality of images to obtain the residence characteristic of the liquid substance on the surface of the first test piece,
the residence characteristic represents the change of the amount of liquid substances generated in the process that the first test piece is ablated and residing on the surface of the first test piece along with the ablation time;
the method further comprises the following steps:
acquiring the residence characteristics corresponding to at least two test pieces with different surface microstructures;
determining the relationship between the surface microstructure parameters of the test piece and the residence characteristics according to the residence characteristics corresponding to the at least two test pieces;
based on the relationship, the dwell characteristic of the second test piece is evaluated in accordance with surface microstructure parameters of the second test piece.
2. The method of claim 1, wherein said obtaining from said plurality of images a change characteristic of an amount of droplets residing on a surface of said first specimen as a function of ablation time comprises:
and acquiring the variation of the proportion of the area of the first test piece covered by the resident liquid drop on the surface of the first test piece to the surface area of the first test piece along with the ablation time.
3. The method of claim 1, further comprising:
and in the process that the test piece is ablated, blue light is used as an incident light source to irradiate the surface of the first test piece.
4. The method of claim 3, wherein the acquiring the image of the first specimen surface comprises:
and acquiring an image of the surface of the first test piece after the image is filtered by a filter, wherein the filter is used for filtering the radiant light generated by the first test piece in the oxidation process.
5. The method of claim 1, further comprising:
the first test piece and the second test piece are made of C/SiC composite materials.
6. An apparatus for obtaining the residence property of liquid substance on the surface of a material, comprising:
the first acquisition module is used for acquiring a plurality of images of the surface of a first test piece in the ablation process of the first test piece;
a second acquisition module, configured to acquire, from the plurality of images, a change characteristic that an amount of droplets residing on the surface of the first test piece exhibits along with ablation time, to obtain a residence characteristic of a liquid substance on the surface of the first test piece,
the residence characteristic represents the change of the amount of liquid substances generated in the process that the first test piece is ablated and residing on the surface of the first test piece along with the ablation time;
the device further comprises:
the third acquisition module is used for acquiring the residence characteristics corresponding to at least two test pieces with different surface microstructures;
the determining module is used for determining the relationship between the surface microstructure parameters of the test piece and the residence characteristics according to the residence characteristics corresponding to the at least two test pieces;
and the evaluation module is used for evaluating the residence characteristic of the second test piece according to the surface microstructure parameter of the second test piece based on the relationship.
7. The apparatus of claim 6, wherein the second obtaining module is configured to:
and acquiring the variation of the proportion of the area of the first test piece covered by the resident liquid drop on the surface of the first test piece to the surface area of the first test piece along with the ablation time.
8. The apparatus of claim 6, wherein the first obtaining module is configured to:
and acquiring an image of the surface of the first test piece after the image is filtered by a filter, wherein the filter is used for filtering the radiant light generated by the first test piece in the oxidation process.
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| PT2502977E (en) * | 2011-03-22 | 2015-11-30 | Gea Mechanical Equipment Gmbh | Malaxation method and device |
| CN103134900B (en) * | 2013-01-30 | 2014-12-24 | 中国航天空气动力技术研究院 | Ablation test method of thermal protection structure of high supersonic velocity aircraft |
| CN103145445B (en) * | 2013-03-21 | 2014-07-02 | 清华大学 | Preparation method for surface microstructure capable of improving oxidization resistance and ablation resistance of material |
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| KR101795566B1 (en) * | 2016-01-05 | 2017-11-09 | 경기대학교 산학협력단 | Assessment Apparatus and Method of Graphene |
| CN106884165B (en) * | 2017-01-13 | 2019-03-22 | 清华大学 | A method of based on the modified raising material against oxidative ablation property of surface micro-structure |
| CN106872637A (en) * | 2017-01-16 | 2017-06-20 | 清华大学 | The dynamic oxidation ablation test device and method of simulated engine blade Service Environment |
| CN108072672B (en) * | 2017-12-14 | 2021-03-02 | 清华大学 | Ablation structure morphology and product online monitoring device and monitoring method thereof |
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