2009 Fiscal Year Final Research Report

Application of high sensitive laser absorption spectroscopy to Arc heated wind tunnel

Research Project

Project/Area Number	20860097
Research Category	Grant-in-Aid for Young Scientists (Start-up)
Allocation Type	Single-year Grants
Research Field	Aerospace engineering
Research Institution	Japan Aerospace Exploration Agency
Principal Investigator	TAKAYANAGI Hiroki Japan Aerospace Exploration Agency, 研究開発本部流体グループ, 研究員 (70513422)
Project Period (FY)	2008 – 2009
Keywords	計測工学 / 高エンタルピー / 分光診断 / 吸収分光 / アーク加熱風洞
Research Abstract	Cavity Enhanced Absorption Spectroscopy has been applied to the Arc heated wind tunnel. This facility has been developed in Chofu aerospace center in order to simulate the environment during reentry from the space. However, because of the mechanical vibration from the cooling water and vacuum system, the transmitted laser signal got worse and absorption signals could not be obtained. Therefore, influence of mechanical vibration on CEAS has been studied by vibrating the high-reflectance mirror which consisted of the cavity. As a result, it was investigated that because of the mechanical vibration, the sensitivity and signal-to-noise ratio were degraded.

(3 results)