CN102533109B

CN102533109B - Oil formula of high speed wind tunnel colorful oil flow experiment

Info

Publication number: CN102533109B
Application number: CN 201110415594
Authority: CN
Inventors: 张军强; 尚金奎; 王世红; 王鹏; 赵民
Original assignee: AVIC Shenyang Aerodynamics Research Institute
Current assignee: AVIC Shenyang Aerodynamics Research Institute
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2013-12-25
Anticipated expiration: 2031-12-14
Also published as: CN102533109A

Abstract

The invention provides an oil formula of a high speed wind tunnel colorful oil flow experiment. Through a series of wind tunnel experiments, a colorful indicator (fluorescent pigment), a carrier oil (N150 mechanical oil) and a diluent (kerosene) are determined, and mass percentage relations of the three materials are determined; colorful oil flow experiment is finished in a high speed wind tunnel (pressure/transonic velocity) environment so as to obtain a colorful oil flow experiment image with high quality; and the colorful oil flow experiment image is used for analyzing airflow state of the model surface so as to realize high speed wind tunnel multi-color oil flow experiment and express one special flowing phenomenon by using different colors.

Description

The formula of oil of high speed wind tunnel colorful oil flow experiment

Technical field

The present invention relates to wind tunnel color oil stream experimental technique, particularly relate to the formula of oil of high speed wind tunnel colorful oil flow experiment.

Background technology

In wind1 tunnel trial, the oil stream test test method that to be some feature of air-flow winding mold type being flowed by means of physical means show 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 the position and the mode of separating and characteristics of position, the position that shock wave and vortex occur and pneumatic separation that air-flow adheres on model, for the 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.

Oil flows while testing by the coating special at the coated one deck of model surface (oil plant that normally contains trickle trace particle), when blowing test, the shearing stress that the model surface air stream on accompany surface forms promotes the oil plant film of model surface and does the viscosity motion, forms oily flow pattern.By the observation analysis to oily flow pattern, determine the flow state on model.

The oil flow pattern is actually the oil plant film and does the viscosity motion under air-flow promotes, the mobile trace collection of illustrative plates formed at model surface, and on oily flow pattern, the principal character structure is singular point.So-called singular point is exactly the point that frictional stress is zero.The different modes of assembling or dispersing at the singular point place according to friction line, be divided into dissimilar singular point.Common are saddle point, node and three kinds of singular points of spiral points in the oil flow pattern.

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 take a line and assemble gradually as asymptotic line, and the existence of saddle point often shows on object plane to have pneumatic separation, as Fig. 1.

The 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 the separation node, as Fig. 2.

Near oil stain line spiral points is rolled onto a bit twist, if all spiral-linees 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 on object plane to exist spiral vortex, as Fig. 3.

Summary of the invention

The technical problem to be solved in the present invention, be to provide a kind of wind-tunnel polychrome colorful oil flow experiment of realizing showing, shows the formula of oil of the high speed wind tunnel colorful oil flow experiment of some special flow phenomenon with different color.

The technical scheme adopted is:

The formula of oil of high speed wind tunnel colorful oil flow experiment, be comprised of colored indicator, carrier oil plant and thinner, and its formula is directly related with the wind speed of high-speed wind tunnel, and the formula of oil that concrete the test wind is corresponding is as follows by mass percentage:

(1) when 0.3≤M<0.7

Carrier oil plant 29%

Colored indicator 28%

Thinner 43%

(2) when 0.7≤M<0.8

Carrier oil plant 64%

Colored indicator 19%

Thinner 17%

(3) when 0.8≤M<1.2

Carrier oil plant 54%

Colored indicator 32%

Thinner 14%

Above-mentioned carrier oil plant is the N150 machinery oil.

Above-mentioned colored indicator is the China red fluorescence pigment FT-714 that brightness group produces forever; Green fluorescence pigment FT-711; Blue-fluorescence pigment FT-719.

Above-mentioned thinner 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 sites, for flowing of display model surface different sites air-flow while carrying out high speed wind tunnel colorful oil flow experiment.

2 colored indicator can be good at showing oily streak line, need to not spray the priming paint for increasing oily stream picture contrast gradient at model surface;

Under 3 different wind conditions, can select different oil to banish ratio, can obtain best oily streak line image.

The accompanying drawing explanation

Fig. 1 is the saddle point schematic diagram.

Fig. 2 a separates the node schematic diagram.

Fig. 2 b adheres to the node schematic diagram.

Fig. 3 separates the spiral points schematic diagram.

Fig. 4 is the high speed wind tunnel colorful oil flow experiment effect picture that uses blue-fluorescence pigment to carry out.

Embodiment

Embodiment mono-

The formula of oil of high speed wind tunnel colorful oil flow experiment:

(1) according to test M=0.5, get the oil plant consumption of estimating in carrier oil plant 29%, colored indicator 28%, thinner 43% and the test of 0.3≤M<0.7 o'clock, determine the consumption of N150 machinery oil, high-visibility pigment and kerosene.

(2) high-visibility pigment weighing

Using absorbent cotton to dip a small amount of kerosene prepares beaker by oil plant and cleans up, after the kerosene volatilization, beaker is placed on electronic balance (or other weighing utensils), open electronic balance, measure appropriate high-visibility pigment with spoon and pour beaker into, until reach needed weight.

(3) N150 machinery oil and kerosene measures

According to definite N150 machinery oil consumption, select appropriate vol to get instrument, measure appropriate N150 machinery oil and inject the oil plant preparation beaker of (2) mentioning.Measuring of kerosene is consistent with the N150 machinery oil.

(4) oil plant stirs

Use stirring rod that the high-visibility pigment and the oil plant that measure are stirred, until high-visibility pigment and oil plant mix.

(5) oil plant of preparation needs standing for some time, to guarantee the abundant loss of bubble in oil plant.Suggestion configures oil plant before being tested about half hour.

(6) dip proper amount of acetone (dehydrated alcohol) by the model surface wiped clean with absorbent cotton or long stapled cotton before the brushing oil plant, after residual acetone vapors away fully, the oil plant for preparing and obtain sufficient standing is brushed equably at model surface, then can be carried out high speed wind tunnel colorful oil flow experiment.

Embodiment bis-

Embodiment bis-and embodiment mono-are basic identical, without part, are M=0.7, get the carrier oil plant 64% of 0.7≤M<0.8 o'clock, colored indicator 19%, and thinner 17%, other are identical.

Embodiment tri-

Embodiment bis-and embodiment mono-are basic identical, and difference is M=1.18, get the carrier oil plant 54% when 0.8≤M<1.2, colored indicator 32%, and thinner 14%, other is identical.

Claims

1. the formula of oil of high speed wind tunnel colorful oil flow experiment, it is characterized in that being formed by colored indicator, carrier oil plant and thinner, the carrier oil plant adopts the N150 machinery oil, thinner adopts kerosene, its formula is directly related with the wind speed of high-speed wind tunnel, the formula of oil that concrete the test wind is corresponding, as follows by mass percentage:

(1) when 0.3≤M<0.7;

Carrier oil plant 29%;

Colored indicator 28%;

Thinner 43%;

(2) when 0.7≤M<0.8;

Carrier oil plant 64%;

Colored indicator 19%;

Thinner 17%;

(3) when 0.8≤M<1.2;

Carrier oil plant 54%;

Colored indicator 32%;

Thinner 14%.

2. the formula of oil of high speed wind tunnel colorful oil flow experiment according to claim 1, is characterized in that described carrier oil plant is the N150 machinery oil.

3. the formula of oil of high speed wind tunnel colorful oil flow experiment 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.

4. the formula of oil of high speed wind tunnel colorful oil flow experiment according to claim 1, is characterized in that described thinner is kerosene.