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A Flow Field Display Method Based on Melt Flow Tracing

A technology for displaying methods and flow fields, applied in the field of fluid experiments, can solve problems such as high complexity, high instrument cost, and difficult experiments, and achieve the effects of convenient preservation, convenient storage and transportation, and extended temperature range.

Active Publication Date: 2021-08-17
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the few similar tracer methods in the prior art, the more popular PIV method with similar functions can be used to measure the velocity field, but the PIV method, especially the three-dimensional PIV method, has difficulties and high complexity in experiments. And the technical problem of high instrument cost, the purpose of the present invention is to provide a flow field display method based on melt flow tracing, which greatly expands the temperature range used by this type of method. At the same time, at normal temperature, the tracer of the melt flow method is Solid state, convenient for machining, storage and transportation

Method used

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  • A Flow Field Display Method Based on Melt Flow Tracing
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  • A Flow Field Display Method Based on Melt Flow Tracing

Examples

Experimental program
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Embodiment 1

[0032] A mixture of tin metal and zinc metal is used as a tracer, and the solid tracer material can be Sn-9Zn as an example, and its melting point is around 200°C.

[0033] Such as figure 1 with figure 2 As shown, a flow field display method based on melt flow tracing, specifically includes the following steps:

[0034] (1) Before the experiment, prepare a model coated with a solid tracer;

[0035] The preparation method of the model coated with the tracer is as follows: the solid tracer is transformed into a liquid tracer by heating to melting, and the solid tracer is formed by applying the liquid tracer on the surface of the model to cool down, and the solid tracer In the shape of a bulging outward on the surface of the model;

[0036] (2) Place the model coated with the solid tracer in the high temperature flow field. According to the physical properties of the tracer substance in the solid tracer, when the temperature of the flow field is higher than the melting point ...

Embodiment 2

[0039] A mixture of tin metal and zinc metal is used as a tracer, and the solid tracer material can be Sn-9Zn as an example, and its melting point is around 200°C.

[0040] Such as figure 1 with figure 2 As shown, a flow field display method based on melt flow tracing, specifically includes the following steps:

[0041] (1) Before the experiment, prepare a model coated with a solid tracer;

[0042] The preparation method of the model coated with tracer is: by opening a circular groove on the surface of the model (such as image 3 shown);

[0043] Such as Figure 4 As shown in Fig. 1, a circular groove is processed on the surface of the model, and a solid tracer is clad. The solid tracer is slightly bulging relative to the surface of the model; the specific steps are as follows:

[0044] The solid tracer is transformed into a liquid tracer by heating until it melts, and the liquid tracer is applied to the circular groove on the surface of the model, and then cooled to for...

Embodiment 3

[0049]On the basis of Example 1 and Example 2, different from Example 1 and Example 3, since the solid tracer is applied on the surface of the model, if it is not controlled by grinding, it is easy to cause the shape of the solid tracer to be irregular and solid The amount of tracer cannot be controlled, and under the shearing action of the airflow, the base of fluid position and shape changes is unstable, thus affecting the surface characteristic flow spectrum reflecting the flow situation. Aiming at this technical problem, the present invention develops a grinding device.

[0050] Such as Figure 5 As shown, the shape of the solid tracer is processed by a grinding device. The grinding device includes a grinding cover 2, a rotating mechanism, and a collection bin 8. The grinding cover 2 is set as a hollow spherical shell, and its inner wall is set as a frosted wall surface. The grinding cover 2 Hollow holes 1 are arranged at equal intervals on the outer wall, and the grindin...

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Abstract

The invention discloses a flow field display method based on melt flow tracing, which specifically includes the following steps: (1) before the experiment, prepare a model coated with a solid tracer; (2) prepare the model coated with a solid tracer Placed in a high-temperature flow field, according to the physical properties of the tracer substance in the solid-state tracer, when the temperature of the flow field is higher than the melting point of the solid-state tracer, the solid-state tracer melts under the action of high-temperature airflow, and due to the high temperature Due to the shearing action of the gas flow, the tracer substance in the molten state forms a flow pattern on the surface of the model. The solid-state tracer can adapt to high-temperature flow field conditions, which can greatly expand the temperature range of the fluid surface tracer method; the solid-state tracer can be machined; the model coated with this type of solid-state tracer can be placed and stored conveniently , to facilitate the experiment; and the solid-state tracer is convenient for storage and transportation.

Description

technical field [0001] The invention belongs to the technical field of fluid experiments, and in particular relates to a flow field display method based on melt flow tracing. Background technique [0002] For the research of a certain flow field, the first thing people pay attention to is its flow velocity field. In all types of flow experiments, one of the key concerns is the flow velocity distribution on the surface of the model. For the technical method of displaying the flow field distribution on the surface of the model, the oil flow tracing method is widely used. [0003] Traditional oil flow tracer operation: Before the experiment, use a thin tube or a duckbill pen to evenly drop the oil flow tracer on the surface of the model at a certain interval. The oil drop bulges slightly when it is on the surface. During the experiment, the shear force of the airflow near the surface of the model acts on the oil droplet to deform it and flow in the direction of the airflow on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 李逸翔罗凯汪球
Owner INST OF MECHANICS CHINESE ACAD OF SCI