並列タイトル等INSTRUMENTATION TECHNIQUES FOR AERODYNAMIC HEATING MEASUREMENT IN N.A.L. HYPERSONIC GUN TUNNEL
タイトル（掲載誌）航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-780
一般注記This report describes development and applications of instrumentation techniques for heat transfer measurements in the N.A.L. hypersonic gun tunnel since 1968. The measuring system, based on transient surface thermometry, mainly consists of a platinum thin-film gauge, constant current source and analog network, and enables one to measure the unsteady heating rate with a response time of less than 100μs. The details of fabrication techniques and performances of the system components are presented: Besides the thin-film gauge made by the sputtering method, a gauge made by the painting and baking method was developed for measurements under erosive circumstances of the gauge in the gun tunnel experiments. An R-C network, an electrical analog of the heat conduction into a slab, is used to obtain the instantaneous heating rate from the output of the thin-film gauge. The response times and outputs of analog networks were calculated by the Fourier expansion method when the input varied with time as the root t. It simulates the signal from the thin-film heated as a step functin. The output of the manufactured network was also calibrated by the above input signal. Both results for the manufactured analog network show that its response is fast enough and the difference of its output level from the solution of the heat conduction equation is less than 1%. The evaluations are made for errors caused by the system components during calibration and measurement. The analysis of non-onedimensional heat conduction effect, which is usually neglected in transient surface thermometry, shows that the effect is significant for the measurement of a heat flux distribution having a step peak such as observed in shock-interference heating. Some results of heat transfer measurements by this system are shown in the present paper.
資料番号: NALTR0780000
レポート番号: NAL TR-780
一次資料へのリンクURLhttps://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=45038&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