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Point heat source solid material thermophysical parameter testing experimental device

A technology of thermophysical parameters and solid materials, which is applied in the field of experimental devices for measuring thermophysical parameters of solid materials with point heat sources, can solve problems such as surface area calculation errors, higher requirements for the surface flatness of test pieces, and the influence of laser heating power conversion.

Pending Publication Date: 2021-01-05
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

Among them, the laser flash method is the fastest-growing and most representative method. It is a transient measurement method generally recognized by the international thermophysics community. The resulting surface area calculation error has a significant impact on the conversion of laser heating power

Method used

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  • Point heat source solid material thermophysical parameter testing experimental device
  • Point heat source solid material thermophysical parameter testing experimental device
  • Point heat source solid material thermophysical parameter testing experimental device

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Embodiment approach

[0019] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] refer to figure 2 , the vacuum pump 1 is installed on the operating table 6, which creates a vacuum environment and reduces the influence of the external environment on the experimental temperature during the experiment, thereby improving the test accuracy. At the beginning of the experiment, turn on the vacuum pump 1. The vacuum pump 1 will evacuate the vacuum box through the PVC pipe 2 connected to the suction port of the vacuum pump 1 by the clamp 11. The cross four-way valve 13 is installed in the center of the upper end cover 3 by screws. 3 is surrounded by a rubber sleeve 9; the right end port of the exhaust valve 12 is connected to the left end port of the cross four-way valve 1...

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Abstract

The invention relates to the technical field of material thermophysical parameter testing, in particular to a point heat source solid material thermophysical parameter testing experimental device which comprises a laser point heat source unit, a sample experimental unit and a signal acquisition unit. The experimental device for measuring the thermophysical parameters of the solid material by usingthe laser point heat source unsteady state heat transfer model is developed by means of forming a point heat source on a sample by utilizing spots emitted by a laser emitter. A tested sample is in avacuum environment so that the influence of an external environment on the acquisition temperature of a test point in an experiment process is reduced. Meanwhile, the experimental device avoids unevenheating of the surface of the sample caused by uneven surface of the sample, and effectively improves the parameter testing precision.

Description

Technical field: [0001] The invention relates to the technical field of testing thermal physical property parameters of materials, in particular to an experimental device for measuring thermal physical property parameters of solid materials with a point heat source. Background technique: [0002] The thermophysical properties of materials are important characteristic parameters of materials. It refers to the general term of parameters that reflect various thermodynamic properties exhibited by materials in thermal processes, including density, specific heat, thermal conductivity, thermal diffusivity, and melting rate. , thermal expansion coefficient, viscosity, surface emissivity and absorptivity, melting point, boiling point, etc., which systematically reflect the heat carrying capacity and heat transport capacity of materials. Thermophysical property testing research is a research across multiple fields, and it is closely related to space technology, energy technology, mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 周保杰陈清华陈文涛苏国用高伟
Owner ANHUI UNIV OF SCI & TECH
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