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Configuration method and test oil agent for oil flow test in high-speed wind tunnel

A technology of high-speed wind tunnel and configuration method, which can be used in aerodynamic tests, measuring devices, testing of machine/structural components, etc. It can solve problems such as poor compatibility of oil agents, harsh formulations, and poor storage of oil flow maps. , to achieve the effect of increasing the range of use, good oil flow test, and long-term storage of the map

Active Publication Date: 2019-06-21
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The formula of the oil preparation in the wind tunnel oil flow test of the prior art is harsh, and the effect of the oil flow map is closely related to the oil formula, and the obtained oil flow map is not resistant to storage; the compatibility of the oil agent is not strong, and one type of formula can only Complete the test for the appropriate category

Method used

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  • Configuration method and test oil agent for oil flow test in high-speed wind tunnel
  • Configuration method and test oil agent for oil flow test in high-speed wind tunnel
  • Configuration method and test oil agent for oil flow test in high-speed wind tunnel

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Experimental program
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Effect test

Embodiment 1

[0048] Set the Ma of the high-speed wind tunnel to 0.4, and according to the corresponding relationship between Ma and the viscosity of the oil flow test oil, the viscosity of the oil flow test oil in the high-speed wind tunnel is obtained as 3150mPa.s. figure 1 According to the relationship curve between the mass ratio of engine oil titanium dioxide and viscosity, the mass ratio of engine oil titanium dioxide is 1.3. Take 1g of titanium dioxide with a particle size of 200 mesh and add it to 1.3g of engine oil with a viscosity of 400mPa.s, mix it evenly, and then add 0.046g fluorescent leak detection agent, the three substances are evenly mixed to obtain a high-speed wind tunnel oil flow test oil.

[0049] Fluorescence oil flow test, colored oil flow test and conventional black and white oil flow test were carried out under the condition of Ma 0.4 using the above-mentioned high-speed wind tunnel oil flow test oil, and the oil flow diagram was obtained. figure 2 The oil flow s...

Embodiment 2

[0051] When the Ma of the high-speed wind tunnel is set to 1.5, according to the corresponding relationship between Ma and the viscosity of the oil flow test oil, the viscosity of the high-speed wind tunnel oil flow test oil is obtained as 2850mPa.s. figure 1 The relationship curve between the mass ratio of engine oil titanium dioxide and viscosity shows that the mass ratio of engine oil titanium dioxide is 1.5. Use absorbent cotton to dip a small amount of absolute ethanol to clean the beaker. After the absolute ethanol is completely volatilized, place the beaker in the electronic On the balance (or other weighing equipment), turn on the electronic balance, use the key to measure 1g of titanium dioxide with a particle size of 300 mesh, put it in a beaker, reset it to zero, then add 1.5g of engine oil with a viscosity of 200mPa. Return to zero, and finally add 0.125g of fluorescent powder, and use a stirring rod to mix the three substances evenly to obtain a high-speed wind tun...

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Abstract

The invention relates to a preparation method of a high-speed wind tunnel oil flow testing oil agent and a testing oil agent, wherein the preparation method and the testing oil agent belong to the field of wind tunnel flow testing technology. The preparation method comprises the following steps of preparing sample mixtures with different mass ratios between engine oil and titanium dioxide powder, testing viscosities of the sample mixtures, and obtaining a relation curve between the engine-oil-to-titanium-dioxide-powder ratios and the viscosities; determining the viscosity of the testing oil agent according to a Ma value of an oil flow test, and obtaining the engine-oil-to-titanium-dioxide-powder ratio of the testing oil agent according to the viscosity and the relation curve; and according to the engine-oil-to-titanium-dioxide-powder ratio, preparing an oil agent mixture of the engine oil and the titanium dioxide powder, and adding a fluorescent indicating agent for being mixed. According to the preparation method, through introducing technical indexes of the viscosity, the testing oil agent is quantified, thereby realizing more convenient preparation and more accurate preparation result. The testing oil agent which is obtained according to the preparation method has high compatibility and furthermore can be used for performing fluorescent oil flow tests, colorful oil flow tests and routine black-and-white oil flow tests.

Description

technical field [0001] The invention relates to the technical field of wind tunnel oil flow tests, in particular to a configuration method and test oil for high-speed wind tunnel oil flow tests. Background technique [0002] In the wind tunnel test, the oil flow test is a test method in which some characteristics of the air flow around the model are displayed in the form of pictures by means of physical means. By observing the oil flow image and conducting topological analysis, we can deeply understand the essence and mechanism of the flow phenomenon, determine the location where the airflow attaches to the model, the location where the shock wave and vortex appear, and the location and mode and characteristics of the separation of the airflow. Providing a basis for rationally explaining the experimental data helps to find ways to solve some specific problems, and also helps to establish, improve and develop new aerodynamic theories. [0003] Oil flow test technology is one...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/02G01M9/06
CPCG01M9/02G01M9/067
Inventor 何彬华刘志勇陈植吴军强吴勇航李巍周袁媛袁兵刘大伟贺操何登吴灿
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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