Method for determining thermal-conduction resistance of metal foam porous medium

Abstract

The invention discloses a method for determining thermal-conduction resistance of a metal foam porous medium. The method comprises the following steps: placing a to-be-determined metal foam porous medium between a hot plate and a cold plate and carrying out vacuumization; energizing and heating the hot plate at an upper part and cooling the cold plate at a lower part via a cooling module; when the whole heat transfer process reaches a stable state and a certain degree of vacuum is reached and maintained unchanged in a test section, acquiring data like temperature, current and voltage in real time by using a data acquisition and processing system; and processing the acquired data by using the data acquisition and processing system so as to eventually obtain thermal-conduction resistance of the metal foam porous medium and providing a test report. The determination method provided by the invention is rapid and simple and has high accuracy.

Description

technical field [0001] The invention relates to the technical field of physical performance testing of materials, in particular to a method for measuring the heat conduction resistance of metal foam porous media. Background technique [0002] With the development of science and technology, metal foam porous media has been widely used in aerospace, energy and other engineering fields, and the research on its heat transfer characteristics has attracted more and more attention. As an engineering material, it is very necessary to determine its own physical parameters. Metal foam porous media, due to its disordered and irregular solid skeleton structure, there is no way to measure the thermal conductivity of its solid skeleton. This note will describe the method for measuring the thermal conduction resistance of the metal foam porous medium solid skeleton. [0003] At present, in the theoretical research of heat and mass transfer in metal foam porous media, for the metal skelet...

AI Technical Summary

Problems solved by technology

Due to the irregular structural characteristics of the solid skeleton of the metal foam porous medium, the heat conduction process is very complicated, so its thermal conductivity cannot simply take the thermal conductivity of the pure material of the skeleton, and there is no direct method to directly measure the thermal conductivity of the porous medium solid skeleton

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