CN108844710A - A kind of icing wind tunnel test ice shape measurement method - Google Patents
A kind of icing wind tunnel test ice shape measurement method Download PDFInfo
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- CN108844710A CN108844710A CN201810768271.XA CN201810768271A CN108844710A CN 108844710 A CN108844710 A CN 108844710A CN 201810768271 A CN201810768271 A CN 201810768271A CN 108844710 A CN108844710 A CN 108844710A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of icing wind tunnels to test ice shape measurement method, the sheet metal of notch consistent with air-foil is provided with using one piece, sheet metal is pushed along horizontal direction, so that wing is caught in notch along the indentation, there of sheet metal, after sheet metal and wing completely attach to, extract sheet metal out, aerofoil profile on the ice sheet of aerofoil surface along wing leaves a section, with in one piece of section with the consistent plotting board insertion ice sheet of sheet metal form, a curve is drawn on plotting board along ice sheet surface；Plotting board is extracted out, by the curve on measurement access panel it can be concluded that the thickness and shape of ice sheet；The present invention is because the measurement sheet metal of this programme is unfixed, therefore cutting ice sheet can be made quick by the processing heated to it, it is not in the problem of cutting sheet metal in traditional technology is blocked by ice, because the problem of ice sheet will not being destroyed because of shake sheet metal.
Description
Technical field
The present invention relates to low speed icing wind tunnel fields of measurement, in particular relate to a kind of icing wind tunnel test ice shape measurement side
Method.
Background technique
It is a kind of physical phenomenon for being widely present in flight practice that aircraft, which freezes, is cause flight safety accident main hidden
One of suffer from.When aircraft is below the freezing point or mistake when flight under the conditions of icing meteorology near freezing point, in atmosphere in environment temperature
Cold water drop strikes aircraft surfaces, icing phenomenon be just easy to wing, empennage, rotor, air intake duct, windshield, antenna house,
The parts surfaces such as gauge sensor occur.Aircraft, which freezes, not only increases the weight of aircraft, and destroys the gas of aircraft surfaces
Dynamic shape, changes Flow Field, destroys aeroperformance, causes the decline of aircraft maximum lift, flight resistance to rise, operability
It can decline, stability reduction, very big threat be caused to flight safety, the aircraft accident caused by icing is shown in not repeatly
Fresh, serious icing can even lead to fatal crass.
After in icing wind tunnel for the icing tests in aerofoil profile, need on wing icing thickness and shape into
Row measurement；And at present the most common laser scanning 3D imaging technique because ice sheet reflective and light leakage phenomenon, at all with regard to nothing
Method is measured using the technology.Therefore operator's manual test can only be passed through for the measurement of ice layer thickness and shape；And
After aerofoil profile is exactly fixed on by existing test mode, measured by the measuring tool being fixed in aerofoil profile.This measurement
Method is because must shift to an earlier date fixation measuring tool, so that during the test, measuring tool is influenced to will appear measurement by ice sheet
Deviation, and because tool fixes, which can only measure the ice layer thickness of fixed point, not can be carried out the survey of other points
Amount.There are also maximum disadvantages to be that, measuring tool is fixed in aerofoil profile in wind tunnel test, inherently one unusual shadow
The way of measurement accuracy is rung, and installation is very troublesome, needs to punch in aerofoil profile, and setting device meeting excessive in aerofoil profile
Influence the flow field of airfoil surface.Therefore, it is necessary to improve to current measurement method.
Summary of the invention
The object of the present invention is to provide a kind of new measurement methods, solve the various drawbacks in existing measurement method.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of icing wind tunnel test ice shape measurement method, this approach includes the following steps：
Step 1：Along horizontally arranged one piece for cutting the sheet metal of ice sheet, the metal in any vertical direction
Be provided at piece face wing with the consistent notch of air-foil, along horizontal direction push sheet metal so that wing is along gold
The indentation, there for belonging to piece is caught in notch；
Step 2：After sheet metal and wing completely attach to, sheet metal is extracted out, along the aerofoil profile of wing on the ice sheet of aerofoil surface
Leave a section；
Step 3：With in one piece of section with the consistent plotting board insertion ice sheet of sheet metal form, surveyed and drawn along ice sheet surface
A curve is drawn on plate；
Step 4：Plotting board is extracted out, by the curve on measurement access panel it can be concluded that the thickness and shape of ice sheet.
In the above-mentioned technical solutions, it in the step 1, before pushing sheet metal, is first carried out at the gap edge of sheet metal
Heating, it is ensured that sheet metal is cut in ice sheet.
In the above-mentioned technical solutions, the sheet metal of heating with ice sheet when being cut, continual cutting on ice sheet
Condensing agent is sprayed at mouthful.
In the above-mentioned technical solutions, in the step 3 plotting board include one piece of substrate and be disposed on the substrate have net
The paster of lattice.
In the above-mentioned technical solutions, the shape of the paster is consistent with substrate, and the paster can be with base after drafting
Plate separation.
In the above-mentioned technical solutions, sheet metal and plotting board setting can move up and down in wind-tunnel along its vertical direction
Horizontal shore on.
In the above-mentioned technical solutions, the horizontal shore includes two horizontally-supported sides, two support edges and a company
Edge fit constitutes U-shaped structure.
In the above-mentioned technical solutions, the shape of the U-shaped structure is consistent with air-foil, and the opening diameter of U-shaped structure
Greater than the thickness of air-foil.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
The present invention is different from traditional test method, the surface of guarantee air-foil first without any measuring tool of fixation,
All measuring tools are all fixed by external realization level；
Secondly because the horizontal shore in this programme may be implemented arbitrarily to move in vertical direction, so that the support
Frame has versatility, can the electrodeless ice layer thickness and shape for testing any point on air-foil；
Finally, because the measurement sheet metal of this programme is unfixed, therefore the processing by being heated to it can make
It is quick to cut ice sheet, is not in the problem of cutting sheet metal in traditional technology is blocked by ice, because will not be because of shake gold
Belong to the problem of piece is to destroy ice sheet.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the airfoil structure schematic diagram of wing；
Fig. 2 is the cutting schematic diagram of sheet metal and wing；
Fig. 3 is the structural schematic diagram of support frame；
Wherein：1 is support frame, and 2 be tested model, and 3 be level support platform, and 4 be sheet metal cutter.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
It is the air-foil structural schematic diagram for needing to measure in this programme as shown in Fig. 1, in icing wind tunnel test,
The aerofoil profile is in cryonetic wind tunnel flow field, and aerofoil surface can quickly freeze, and main purpose is exactly after being used to measure icing tests
The icing thickness and icing shape of aerofoil surface.
As shown in Fig. 2, be the tool for cutting ice sheet, one piece of very thin sheet metal is provided with one on sheet metal and lacks
Mouthful, the size of the notch and the size of air-foil are completely the same, that is to say, that, should in the case that aerofoil surface does not freeze
The notch of sheet metal can be stuck in completely in the leading edge of wing, after aerofoil surface and leading edge icing, pass through the cutting of sheet metal
It is fastened togather afterwards with wing, the thickness and shape of ice sheet can be obtained by the size after measurement cutting.
This programme is as shown in figure 3, be the support frame for being used to support sheet metal, when the sheet metal in Fig. 2 will be used to cut
When cutting ice sheet, it is necessary to guarantee a premise, is exactly that sheet metal necessarily is in same level relative to fixed wing, and
Support frame is necessary for fixed.Therefore the top of support frame uses an adjustable stud, by the stretching for adjusting stud
Distance realizes the locking up and down for support frame in wind-tunnel, it is ensured that support frame will not be subjected to displacement in operation, without
When needing to cut, support frame can be removed into wind-tunnel, reduce it and there is the influence to Flow Field in Wind Tunnel.Support frame in this programme is also
One maximum benefit is that support frame can carry out any position adjusting in vertical direction, and allowing in this way can
Ice layer thickness is carried out with the surface of any position to wing and shape measures.It is used to support the horizontal shore of sheet metal
It include the connection side of two support edges and connection support edge, support edge and connection side constitute a U-shaped structure, sheet metal setting
It in U-shaped structure, is in a horizontal position, pushes metal edges to can be achieved with cutting ice sheet to wing advance along its horizontal direction
It cuts.
In the present solution, since it is considered that simple goes cutting ice sheet, sheet metal meeting during cutting with sheet metal
It is blocked by ice sheet, and meeting is so that the ice sheet of two sides ruptures above and below sheet metal during pulling sheet metal after blocking, damage
Bad ice sheet, so as to cause the measurement inaccuracy of ice sheet.Therefore, in the present solution, sheet metal cut ice sheet before, first to metal
The edge of the indentation, there of piece is heated, and is made ice sheet fast melt with the temperature difference of ice using on sheet metal, is reached cutting
Purpose.In order to which with better thermal conductivity, sheet metal generally uses copper sheet, because copper has biggish thermal capacitance value.But because
Temperature on sheet metal be it is uncontrollable, especially and after ice sheet contact, therefore the excessively high sheet metal of temperature makes it possible to ice
The thawing of layer is accelerated, so that the thickness of ice sheet and shape change.Therefore it during sheet metal cutting, needs pair
Sprinkling condensing agent is carried out on the ice sheet cut, so that ice sheet will not destroy ice because of temperature excessively high the phenomenon that melting
The shape of layer.
After the sheet metal of heating is cut open on ice sheet, just sheet metal is extracted, change one piece of plotting board to be surveyed
It draws.Plotting board includes one piece and the comparable thin slice of plate thickness, then posts the paper with grid, the mapping on its surface
Plate has the structure snd size as sheet metal, and plotting board is inserted into the cutting mouth on ice sheet, after fixing plotting board,
It is drawn lines on plotting board with pen along the ice sheet of aerofoil surface.After painting line, extracts plotting board out and remove grid paper, pass through survey
Width on amount grid paper can be obtained by the icing thickness and shape of aerofoil surface with its shape is observed.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. a kind of icing wind tunnel tests ice shape measurement method, it is characterised in that this approach includes the following steps：
Step 1：Along horizontally arranged one piece for cutting the sheet metal of ice sheet, the metal in any vertical direction
Be provided at piece face wing with the consistent notch of air-foil, along horizontal direction push sheet metal so that wing is along gold
The indentation, there for belonging to piece is caught in notch；
Step 2：After sheet metal and wing completely attach to, sheet metal is extracted out, along the aerofoil profile of wing on the ice sheet of aerofoil surface
Leave a section；
Step 3：With in one piece of section with the consistent plotting board insertion ice sheet of sheet metal form, surveyed and drawn along ice sheet surface
A curve is drawn on plate；
Step 4：Plotting board is extracted out, by the curve on measurement access panel it can be concluded that the thickness and shape of ice sheet.
2. a kind of icing wind tunnel according to claim 1 tests ice shape measurement method, it is characterised in that in the step 1,
Before pushing sheet metal, first to being heated at the gap edge of sheet metal, it is ensured that sheet metal is cut in ice sheet.
3. a kind of icing wind tunnel according to claim 2 tests ice shape measurement method, it is characterised in that the sheet metal of heating
When being cut with ice sheet, the continual incision on ice sheet sprays condensing agent.
4. a kind of icing wind tunnel according to claim 1 tests ice shape measurement method, it is characterised in that in the step 3
Plotting board includes one piece of substrate and the paster with grid that is disposed on the substrate.
5. a kind of icing wind tunnel according to claim 4 tests ice shape measurement method, it is characterised in that the shape of the paster
Shape is consistent with substrate, and the paster can be separated with substrate after drafting.
6. a kind of -5 any icing wind tunnels test ice shape measurement method according to claim 1, it is characterised in that sheet metal
Being arranged in wind-tunnel with plotting board can be along on the horizontal shore that its vertical direction moves up and down.
7. a kind of icing wind tunnel according to claim 6 tests ice shape measurement method, it is characterised in that described horizontally-supported
Frame includes two horizontally-supported sides, and two support edges and a connection side constitute U-shaped structure.
8. a kind of icing wind tunnel according to claim 7 tests ice shape measurement method, it is characterised in that the U-shaped structure
Shape is consistent with air-foil, and the opening diameter of U-shaped structure is greater than the thickness of air-foil.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653966A (en) * | 2019-02-18 | 2019-04-19 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of anti-deicing test method of wind energy conversion system wing panel |
| CN109696289A (en) * | 2019-02-18 | 2019-04-30 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of wind energy conversion system wing panel icing test macro and method |
| CN111003209A (en) * | 2019-12-26 | 2020-04-14 | 中国航空工业集团公司西安飞机设计研究所 | Large-scale empennage deicing wind tunnel test device and method |
| CN111289206A (en) * | 2020-04-28 | 2020-06-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Ice shape measurement auxiliary device and method |
| CN111351629A (en) * | 2020-05-09 | 2020-06-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel test ice shape measuring device and method |
| CN111521131A (en) * | 2020-07-06 | 2020-08-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Data acquisition device and data acquisition method for ice sample structural analysis |
| CN112729762A (en) * | 2021-03-29 | 2021-04-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for measuring uniformity of icing grid and cloud and mist field |
| CN113483512A (en) * | 2021-09-07 | 2021-10-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel test ice-shaped cutting device and cutting method |
| CN116448376A (en) * | 2023-06-16 | 2023-07-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Spray air supply system for icing wind tunnel and adjusting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653966A (en) * | 2019-02-18 | 2019-04-19 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of anti-deicing test method of wind energy conversion system wing panel |
| CN109696289A (en) * | 2019-02-18 | 2019-04-30 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of wind energy conversion system wing panel icing test macro and method |
| CN111003209A (en) * | 2019-12-26 | 2020-04-14 | 中国航空工业集团公司西安飞机设计研究所 | Large-scale empennage deicing wind tunnel test device and method |
| CN111289206A (en) * | 2020-04-28 | 2020-06-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Ice shape measurement auxiliary device and method |
| CN111351629A (en) * | 2020-05-09 | 2020-06-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel test ice shape measuring device and method |
| CN111351629B (en) * | 2020-05-09 | 2020-09-01 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel test ice shape measuring device and method |
| CN111521131A (en) * | 2020-07-06 | 2020-08-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Data acquisition device and data acquisition method for ice sample structural analysis |
| CN112729762A (en) * | 2021-03-29 | 2021-04-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for measuring uniformity of icing grid and cloud and mist field |
| CN112729762B (en) * | 2021-03-29 | 2021-07-02 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for measuring uniformity of icing grid and cloud and mist field |
| CN113483512A (en) * | 2021-09-07 | 2021-10-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing wind tunnel test ice-shaped cutting device and cutting method |
| CN116448376A (en) * | 2023-06-16 | 2023-07-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Spray air supply system for icing wind tunnel and adjusting method |
| CN116448376B (en) * | 2023-06-16 | 2023-08-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Spray air supply system for icing wind tunnel and adjusting method |
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| CN108844710B (en) | 2021-02-09 |
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