CN102564723B - Formula of oil for color oil flow test of low-speed wind tunnel - Google Patents
Formula of oil for color oil flow test of low-speed wind tunnel Download PDFInfo
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- CN102564723B CN102564723B CN201110415595.3A CN201110415595A CN102564723B CN 102564723 B CN102564723 B CN 102564723B CN 201110415595 A CN201110415595 A CN 201110415595A CN 102564723 B CN102564723 B CN 102564723B
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Abstract
The invention discloses a formula of oil for a color oil flow test of a low-speed wind tunnel. By a series of wind tunnel tests, a color indicator (fluorescent pigments), carrier oil (machine oil N150) and a diluent (kerosene) which are used, and the mass percent relations of the color indicator, the carrier oil and the diluent are determined; the color oil flow test is finished in a low-speed wind tunnel environment, and a high-quality color oil flow test image is obtained and is used for analyzing the flow state of the airflow on the surface of a model; and a multi-color oil flow test of the low-speed wind tunnel is realized, and certain special flow phenomena are shown by using different colors.
Description
Technical field
The present invention relates to wind tunnel color oil stream experimental technique, particularly relate to the formula of oil of color oil flow test of low-speed wind tunnel.
Background technology
In wind tunnel test, the test of oil stream is the test method that some mobile feature of air-flow winding mold type is shown by means of physical means with the form of picture.By observing oily stream picture, and carry out topological analysis, can in depth understand essence and the mechanism of flow phenomenon, determine position that air-flow adheres on model, occur shock wave and the position of vortex and the position of burbling and the mode separating and feature, for pragmatize experimental data provides foundation, contribute to find the approach that solves some particular problem, also contribute to set up, improve and develop new Aerodynamics.
When test in oil stream, is by the special coating of the coated one deck of model surface (normally containing the oil plant of trickle trace particle), in the time blowing test, the oil plant film that the shear stress that model surface air stream on accompany surface forms promotes model surface does viscosity motion, forms oily flow pattern.By the observation analysis to oily flow pattern, determine the flow state on model.
Oil flow pattern is actually oil plant film and under air-flow promotes, does viscosity motion, the mobile trace collection of illustrative plates forming at model surface, and on oily flow pattern, principal character structure is singular point.So-called singular point, be exactly friction stree be zero point.The different modes of assembling or dispersing at singular point place according to friction line, is divided into dissimilar singular point.In oil flow pattern, common are saddle point, node and three kinds of singular points of spiral points.
Saddle can be seen two groups of oil stain lines, and one group of oil stain line points to saddle point, and another group oil stain line leaves saddle point, and assembles gradually taking a line as asymptotic line, and the existence of saddle point often shows there is burbling on object plane, as Fig. 1.
Node place can see that a lot of bar oil stain lines converge to a bit, if all oil stain lines all deviate from node, are called and adhere to node; If all oil stain lines all point to node, be called separation node, as Fig. 2.
Near oil stain line spiral points is rolled onto a bit twist, if all helixes are all to enter spiral points, for separating spiral points; If all spiral points are all from spiral points, for adhering to spiral points.The existence of spiral points shows to have spiral vortex on object plane, as Fig. 3.
Summary of the invention
The technical problem to be solved in the present invention, is to provide one and can realizes the test of wind-tunnel multicolour oil stream, shows the formula of oil of the low-speed wind tunnel colorful oil flow of some special flow phenomenon with different color.
The technical scheme adopting is:
The formula of oil of color oil flow test of low-speed wind tunnel, formulated by mass percentage by colored indicator, carrier oil plant and thinning agent, its mass percent is: carrier oil plant 42%, colored indicator 33%, thinning agent 25%.
Above-mentioned carrier oil plant is M150 machinery oil.
Above-mentioned colored indicator is red fluorescence pigment FT-714; Green fluorescence pigment FT-711; Blue-fluorescence pigment FT-719.
Above-mentioned thinning agent is kerosene.
Advantage of the present invention is:
1 can be at the coated oil plant that contains the colored indicator of different colours of model different parts, for flowing of display model surface different parts air-flow while carrying out color oil flow test of low-speed wind tunnel.
2 colored indicator can be good at showing oily streak line, need to not spray the priming paint for increasing oily stream picture contrast at model surface;
3 same formulas can carry out the colorful oil flow experiment of different wind speed, can obtain best oily streak line image.
After 4 oily streams configure, about about half an hour or shorter can test, do not need to leave standstill long-time.
Brief description of the drawings
Fig. 1 is saddle point trace collection of illustrative plates.
Fig. 2 a separates node trace collection of illustrative plates.
Fig. 2 b adheres to node trace collection of illustrative plates.
Fig. 3 separates spiral points trace collection of illustrative plates.
Fig. 4 is the color oil flow test of low-speed wind tunnel effect picture that uses blue-fluorescence pigment to carry out.
Fig. 5 is the color oil flow test of low-speed wind tunnel effect picture that uses green fluorescence pigment to carry out.
Embodiment
The formula of oil of color oil flow test of low-speed wind tunnel, is that fluorescent pigment, carrier oil plant are that N150 machinery oil and thinning agent are that kerosene is formulated by mass percentage by colored indicator, its mass percent:
N150 machinery oil 42%
Fluorescent pigment 33%
Kerosene 25%
Press following preparation:
(1), according to the test wind, by the oil plant consumption of estimating in preparation mass percent and test, determine the consumption of fluorescent pigment, N150 machinery oil and kerosene.
(2) fluorescent pigment weighs
Using absorbent cotton to dip a small amount of kerosene prepares beaker by oil plant and cleans up, after kerosene volatilization, beaker is placed on electronic balance (or other weigh utensil), open electronic balance, measure appropriate fluorescent pigment with spoon and pour beaker into, until reach needed weight.
(3) measuring of N150 machinery oil and kerosene
According to definite N150 machinery oil consumption, select the suitable instrument that measures, measure appropriate N150 machinery oil and inject the oil plant preparation beaker of (2) mentioning.Measuring of kerosene is consistent with N150 machinery oil.
(4) oil plant stirs
Use stirring rod that the fluorescent pigment measuring and oil plant are stirred, until fluorescent pigment and oil plant mix.
(5) oil plant of preparation need leave standstill a period of time, to guarantee the abundant loss of bubble in oil plant.Suggestion configures oil plant before testing about half an hour.
(6) before brushing oil plant, dip proper amount of acetone (absolute ethyl alcohol) by model surface wiped clean with absorbent cotton or long-staple cotton, after residual acetone vapors away completely, the oil plant for preparing and obtain sufficient standing is brushed equably at model surface, then can be carried out color oil flow test of low-speed wind tunnel.
Claims (2)
1. the formula of oil of color oil flow test of low-speed wind tunnel, is characterized in that by colored indicator, N150 machinery oil and kerosene formulatedly by mass percentage, and its mass percent is: N150 machinery oil 42%, colored indicator 33%, kerosene 25%.
2. the formula of oil of color oil flow test of low-speed wind tunnel according to claim 1, is characterized in that described colored indicator is red fluorescence pigment FT-714; Green fluorescence pigment FT-711; Blue-fluorescence pigment FT-719.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110415595.3A CN102564723B (en) | 2011-12-14 | 2011-12-14 | Formula of oil for color oil flow test of low-speed wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110415595.3A CN102564723B (en) | 2011-12-14 | 2011-12-14 | Formula of oil for color oil flow test of low-speed wind tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102564723A CN102564723A (en) | 2012-07-11 |
| CN102564723B true CN102564723B (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110415595.3A Expired - Fee Related CN102564723B (en) | 2011-12-14 | 2011-12-14 | Formula of oil for color oil flow test of low-speed wind tunnel |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104087159B (en) * | 2014-07-08 | 2016-05-11 | 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 low-speed wind tunnel fluoroleum stream display methods based on emulsion carriers formula |
| CN104849018A (en) * | 2015-04-29 | 2015-08-19 | 中国航空工业集团公司哈尔滨空气动力研究所 | Three-component oil for colorful oil flow test of low-speed wind tunnel |
| CN104849017A (en) * | 2015-04-29 | 2015-08-19 | 中国航空工业集团公司哈尔滨空气动力研究所 | Two-component oil for colorful oil flow test of low-speed wind tunnel |
| CN106840576A (en) * | 2017-03-10 | 2017-06-13 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed wind tunnel oil stream test method |
| CN106908214B (en) * | 2017-03-10 | 2019-06-21 | 中国空气动力研究与发展中心高速空气动力研究所 | High-speed wind tunnel oil stream tests the configuration method and test finish of finish |
| CN110987356A (en) * | 2019-12-06 | 2020-04-10 | 中国航空工业集团公司沈阳空气动力研究所 | Formula and using method of colored oil flow suitable for subsonic velocity temporary flushing wind tunnel |
| CN112432755B (en) * | 2020-10-23 | 2022-04-12 | 中国空气动力研究与发展中心高速空气动力研究所 | Wide-speed-range color fluorescent oil flow reagent and viscosity adjusting method thereof |
| CN115371950B (en) * | 2022-10-21 | 2023-01-17 | 中国航空工业集团公司沈阳空气动力研究所 | Fluorescent color oil flow spectrum three-dimensional reconstruction formula and method suitable for inner pipeline |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314272A1 (en) * | 1987-10-07 | 1989-05-03 | ROLLS-ROYCE plc | A method of fluid flow visualisation |
| US5178004A (en) * | 1991-08-08 | 1993-01-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Reflection type skin friction meter |
-
2011
- 2011-12-14 CN CN201110415595.3A patent/CN102564723B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314272A1 (en) * | 1987-10-07 | 1989-05-03 | ROLLS-ROYCE plc | A method of fluid flow visualisation |
| US5178004A (en) * | 1991-08-08 | 1993-01-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Reflection type skin friction meter |
Non-Patent Citations (2)
| Title |
|---|
| 唐贵明.用于激波风洞中的表面油流流动显示方法.《流体力学实验与测量》.2000,第14卷(第2期), |
| 用于激波风洞中的表面油流流动显示方法;唐贵明;《流体力学实验与测量》;20000630;第14卷(第2期);98-101 * |
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| CN102564723A (en) | 2012-07-11 |
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Granted publication date: 20140806 Termination date: 20171214 |