Estimation Of Thermal Conductance On Metallic Contact Interface In Vacuum
Author(s)
T. Hattori, M. Nakamura & Y. Saitou
Abstract
Estimation of thermal conductance on metallic
contact interface in vacuum
T. Hattori', M. Nakamura' & Y. Saitoh
^Mech. Eng. Res. Lab., Hitachi Ltd., Japan
^Nuclear System Division, Hitachi Ltd., Japan
Abstract
Space apparatus subject heavy thermal loads in operating conditions in space. So,
to design these space apparatus with sufficient reliability, the accurate thermal
analysis of these apparatus in vacuum condition is indispensable. In this paper we
have derived a new method for estimating thermal conductance at the contact
interface between metal surfaces. The method takes into account surface
roughness and thermal conductance of surface materials such as oxidized layers.
And it uses Hertz's formula to estimate the real contact area. The estimated
thermal contact conductance is confirmed to agree with the experimentally
measured conductance by using bar-type specimens. It is shown that the new
method can estimate the thermal conductance at the contact interface between
Keywords
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