並列タイトル等熱キャピラリー対流振動による高プラントル数流体円柱の動的表面変形:Tspi測定とG-ジッタ効果
タイトル(掲載誌)宇宙航空研究開発機構研究開発報告 = JAXA Research and Development Report: Marangoni Convection Modeling Research, 2003-2004
一般注記This report describes experimental studies conducted at Yokohama National University during 2003 JFY as a part of the Project Research on Marangoni Convection of National Space Development Agency of Japan (NASDA) (now JAXA). The work consists of (1) the development of a new measuring method for Dynamic Surface Deformation (DSD, hereafter) of cylindrical bridge of high Prandtl number fluid and (2) the study of g-jitter effect on DSD in a simulated g-jitter environment. In the first work, a technique based on Temporal Speckle Pattern Interferometry (TSPI) is developed to make two-dimensional measurement of DSD in oscillatory thermocapillary convection. The technique is designed to have a resolution of better than 0.1 um and be applicable to a curved liquid surface. Its performance is verified through a series of measurements targeting a flat mirror, a glass rod and a liquid bridge, all of which show dynamical surface displacement or deformation. The success of the measurement is due to the special phase-unwrapping algorithm devised for the measurement of oscillatory surface displacement or deformation. In the second work, effects of g-jitter on the measurement of DSD caused by the oscillatory thermocapillary convection in a liquid bridge are studied experimentally. A vibration table driven by a piezoelectric actuator is constructed to generate g-jitters of realistic amplitude and frequency spectra. A micro-imaging displacement meter is used to measure DSD in the presence of g-jitter. It is shown that the natural DSD in the oscillatory state of thermocapillary convection is well separated in the frequency domain from that caused by harmonic and non-harmonic g-jitters. It is concluded that the DSD measurement in the future ISS experiment is feasible even in the presence of g-jitter there.
資料番号: AA0048708002
レポート番号: JAXA-RR-04-027E
一次資料へのリンクURLhttps://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2353&item_no=1&attribute_id=31&file_no=1
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース(IRDB)(機関リポジトリ)
提供元機関・データベース宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ