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搭建了基于真空深冷环境下一维稳态热流的固体界面接触导热研究的试验装置,制作了3对不锈钢—玻璃钢测试试样,每对试样具有不同的表面粗糙度。在真空深冷环境下对不锈钢—玻璃钢界面接触导热进行了试验研究,分析讨论了界面接触压力和接触表面粗糙度等对接触导热的影响。结果表明,在相同接触压力条件下,表面粗糙度越大导致试样的实际接触面积越小,接触导热系数越小;表面粗糙度相同时接触压力越大,接触界面上发生接触的微凸体变形量增大,接触面积增大接触导热系数也越大。
A test device based on one-dimensional steady-state heat flux in a solid-state contact heat conduction study under vacuum cryogenic environment was built. Three pairs of stainless steel-FRP test specimens were made, each having a different surface roughness. The experimental research on the contact thermal conductivity of stainless steel-FRP under vacuum and cryogenic environment was conducted. The effects of contact pressure and contact surface roughness on the contact thermal conductivity were analyzed. The results show that under the condition of the same contact pressure, the larger the surface roughness is, the smaller the actual contact area of the sample is and the smaller the contact thermal conductivity is; the larger the contact pressure is at the same surface roughness, the contact asperities on the contact interface Deformation increases, the contact area increases the contact thermal conductivity is also greater.