Numerical simulation and experimental study of contact thermal resistance under high temperature conditions

Linquan Shi ,Qiang Li

doi:10.24294/tse.v5i1.1523

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Numerical simulation and experimental study of contact thermal resistance under high temperature conditions

Linquan Shi

Qiang Li

Thermal Science and Engineering 2022, 5(1), 1-11; https://doi.org/10.24294/tse.v5i1.1523

Submitted：12 Jan 2022

Accepted：15 Feb 2022

Published：27 Feb 2022

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Abstract

Contact thermal resistance is an important indicator of the efficiency of heat transfer between contact interfaces.

The contact thermal resistance between the interfaces of superalloy GH4169 in high temperature was investigated by

using ANSYS. The real surface morphology of superalloy was obtained with optical microscope, and its surface model

was reconstructed in ANSYS. Based on the theory of structural mechanics, the elastoplastic deformation of the micro

structure of the contact interface is simulated, and analyzed and obtained the contact thermal resistance between contact

interfaces. The effect of interface temperature on the radiative heat transfer between the contact interfaces was studied.

At the same time, the impact of radiation heat transfer between contact interfaces in high temperature is considered.

Finally, it was tested by using an experimental test device. The result show that the maximum deviation between the

contact thermal resistance and the contact thermal resistance was 12.60%, and the contact thermal resistance between

superalloy interfaces decreases with the increase of interface temperature and contact pressure; the contact interface

temperature difference increases first and then decreases with the increase of interface temperature.

Keywords

References

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