Measurenent of Emissivities of Metals, Alloys and Materials for Space Station in Space Conditions

空间站金属、合金和材料在太空条件下的发射率测量

• 批准号: 02452122
• 负责人: HIGANO M.
• 金额: $ 3.97万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452122/
• 关键词: Thermophysical properties; Emissivity; Metal; Copper; Low temperature; Space; Annealing; Vacuum; 〓射率

In Thermal design of "Space Station", many data of the total hemispherical emissivities of materials at low temperatures are needed, but we can find a few data in literatures.We studied a measuring technique for the total hemisperical emissivities of materials. Using a transient calorimetric method, a new technique which measure a total hemispherical emissivity within a short period is developed. To measure the emissivity accurately, guard heater is incorporated in the emissivity aparatus and is regurated to reduce a heat loss through fine thermocouple leads suspending a specimen.Emissivity measurements were performed for copper wire as a specimen. The heat losses through the leads were analyzed in considering combined radiation and conduction heat transfer from the leads. Temperature distribution in the specimen were also analyzed. Measurement were also performed with annealed specimen.It was found that the emissivity of copper for mechanical polished surface is about 0.012 to 0.018 in the temperature range 170 K to 350 K, and the emissivity with annealing is about 0.006 to 0.012 in 137 K to 320 K.

在空间站的热设计中，需要大量的材料在低温下的半球向总发射率数据，但在文献中可以找到很少的数据。利用瞬态量热法，发展了一种在短时间内测量半球总发射率的新技术。为了准确地测量发射率，在发射率隔离器中加入了保护加热器，并通过将细小的热电偶导线悬挂在样品中来减少热损失。在综合考虑导热管辐射和导热的情况下，分析了导热管的散热损失。对试件内部的温度分布进行了分析。在170K~350K温度范围内，机械抛光表面铜的发射率约为0.012~0.018，在137K~320K温度范围内，退火后的发射率约为0.006~0.012。

项目成果

日向野 三雄: "低温域の銅の全半球〓射率" 第44回1990年度秋季低温工学・超伝導学会予稿集. 225 (1990)

Mitsuo Hinatano：“低温区域铜的全球发射率”1990 年秋季第 44 届低温工程和超导学会会议记录 225 (1990)。

日向野 三雄: "低温域の銅の全半球輻射率" 第44回1990年度秋季低温工学・超電導学会予稿集. 225 (1990)

Mitsuo Hinatano：“低温下铜的全球半球发射率”1990 年第 44 届秋季低温工程学会和超导学会会议记录 225 (1990)。

日向野 三雄: "低温域の銅の全半球輻射率" 第44回1990年度秋季低温工学・超伝導学会予稿集. 225 (1990)

Mitsuo Hinatano：“低温下铜的全球半球发射率”1990 年第 44 届秋季低温工程和超导学会会议记录 225 (1990)。

M. HIGANO: ""Measurement of Total Hemispherical Emissivity of Metal at low Temperatures"" Proc. 11th Japan Symposium on Thermophysical Properties. 43-46 (1990)

M. HIGANO：“低温下金属总半球发射率的测量”Proc。

日向野 三雄: "低温域での金属の全半球輻射率の測定" 第11回日本熱物性シンポジウム講演論文集. 43-46 (1990)

Mitsuo Hinatano：“低温下金属的全球半球发射率的测量”第 11 届日本热物理性能研讨会论文集 43-46 (1990)。