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Oil flow formula of high speed wind tunnel oil flow experiment clearly demarcating Mach number range

A Mach number and oil flow technology, used in aerodynamic testing, testing of machine/structural components, measuring devices, etc., can solve problems such as increasing the cost of experiments, affecting the progress of experiments, etc., achieving easy acquisition, performance assurance, deepening flow The effect of field understanding

Inactive Publication Date: 2018-11-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the existing oil-flow coatings often cannot be calibrated for the specific working conditions they are suitable for, which brings great troubles to scientific researchers when selecting coating formulations. It is necessary to continuously select coating formulations and conduct pre-experiments to test whether they are applicable. , which increases the cost of the experiment and also affects the progress of the experiment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] An oil flow formula suitable for oil flow experiments with a Mach number range of 0.5-0.9 in a wind tunnel, which is prepared by mass percentages from titanium dioxide powder as an indicator, silicone oil as a carrier oil, and oleic acid as a diluent:

[0020] Silicone oil: 30%

[0021] Tracer particles: 65%

[0022] Oleic acid: 5%

[0023] 1. Formula configuration: According to the mass percentage: 30% carrier oil, 65% tracer particles, and 5% thinner for proportioning. During the coating preparation process, attention should be paid to fully stirring the tracer particle powder and oil agent. After the proportioning is completed, install into the paint bottle.

[0024] 2. Open the paint bottle and stir it with a glass rod to make it evenly mixed.

[0025] 3. Pour an appropriate amount of oil flow paint into the beaker.

[0026] 4. The surface of the test piece to be brushed is placed horizontally, and the brushing direction should be perpendicular to the direction ...

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Abstract

The invention relates to an oil flow formula of a high speed wind tunnel oil flow experiment clearly demarcating the Mach number range, and particularly relates to an oil flow formula suitable for theoil flow experiment of which the Mach number range is 0.5-0.9. Use of the trace particle-powdery titanium dioxide, the carrier oil-silicone oil and the diluent-oleic acid is determined through a series of experiments and the mass percent relationship of the three components is determined. A large number of oil flow display experiments are completed and indicate that the oil flow formula can acquire the high-quality oil flow test image for analyzing the model surface air flow pattern so as to achieve the effect of flow visualization.

Description

technical field [0001] The invention relates to an oil flow formula for a high-speed wind tunnel oil flow experiment with a clearly calibrated Mach number range, in particular to an oil flow formula for an oil flow experiment with a Mach number range of 0.5-0.9. Background technique [0002] The oil flow map obtained by the oil flow experiment mainly reflects the flow picture near the object surface, which makes the flow field "visualized", and can analyze complex flow phenomena such as secondary flow, separation flow and vortex flow according to the obtained oil flow trajectory. . Therefore, the oil flow experiment is one of the important experimental methods to understand the separation of the boundary layer and the vortex structure. It is widely used in the flow field display and measurement of the flow field of aerodynamic components, such as: aircraft fuselage and wings, aeroengines, gas turbines, etc. Blades, end walls, etc. of turbomachinery. [0003] The principle ...

Claims

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Application Information

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IPC IPC(8): G01M9/06
CPCG01M9/065
Inventor 高丽敏郑天龙葛宁杨冠华蔡明吴锋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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