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第25回大気圏シンポジウム（2011年2月21日-22日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県, 25th Atmospheric Science Symposium (February 21-22, 2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000072010, レポート番号: Ⅱ-4

第24回大気圏シンポジウム（2010年2月18日-19日. 宇宙航空研究開発機構宇宙科学研究本部（JAXA)(ISAS)）, 相模原市, 神奈川県, 24th Atmospheric Science Symposium (February 18-19, 2010. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, 資料番号: SA6000073012, レポート番号: Ⅱ-6

An analysis of a two-dimensional thin airfoil motion is presented, for cases when it flies over and in-proximity-to a wavy-wall surface in an incompressible inviscid flow. Lifting surface technique is used. The results of computation agree satisfactorily with ones of another scheme, which is based on a finite difference method. Efficient integral domain on the wall surface is carefully settled. Some computations are included which suggest effect of many parameters on WIG sea-worthiness., 資料番号: NALSP0016008, レポート番号: NAL SP-16

The lift on an airfoil flying over a wavy wall surface is calculated using a finite difference method, which was developed by J. Nakamichi to improve LTRAN2 evolved by W.F. Ballhaus & P.M.Goorgian. In order to apply this LTRAN2 version to our problem, some manipulation on grid-making-system is needed. First, cases of a flat plate over a flat solid wall are calculated to check the coding prior to the cases of a moving wavy wall. Second, aerodynamic characteristics of a flat plate over a moving wavy wall are calculated, and third its motion is investigated. The calculated results are compared with those obtained by the lifting surface theory. The agreements are quite satisfactory., 資料番号: NALSP0016009, レポート番号: NAL SP-16