Proposal of periodic-heating heterodyne interferometry and evaluation of nano-scale thermal dimensional stability of low thermal expansion material for spacecraft

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14509
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Aerospace engineering
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: OGAWA HIROYUKI 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (60311172)
• Co-Investigator(Kenkyū-buntansha): 長野 方星 名古屋大学, 工学研究科, 教授 (10435810)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 線膨張係数 / 熱伝導率 / 天文衛星 / 熱ひずみ

Outline of Final Research Achievements

In order to achieve a high precise thermal strain design of spacecraft, a simultaneous measurement for a coefficient of thermal expansion (CTE) and a thermal diffusivity has been proposed, and its feasibility was experimentally examined. A new measurement method which consists of a heterodyne interferometry which has a good advantage in high wavelength resolution for the CTE, and periodic heating method for the thermal diffusivity has been developed. First, a measurement accuracy was evaluated with a single crystal silicon. Second, the temperature dependence of the CTE for carbon fiber reinforced plastic was measured, finally, a simultaneous measurement of the CTE and the thermal diffusivity for Al alloy was conducted and its high-accurate measurement was demonstrated.

Free Research Field

航空宇宙工学、熱工学、熱設計、二相流