並列タイトル等Application of the eN Method to Calculations of Laminar Flow Control
タイトル（掲載誌）航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory SP-5
一般注記The eN method was applied to two-dimensional, incompressible laminar boundary layers with and without suction with the aim of developing an aerodynamic design method for a laminar flow control airfoil. The method consisted of an airfoil, boundary layer and eN codes, respectively. The airfoil code used the vortex singularity method and the boundary layer code Keller's Box method. In the eN code, the Orr-Sommerfeld equation was solved spatially with a given fundamental flow by the Itoh method (ref.8) and the growth rate - alphai was integrated from the neutral point to an arbitrary downstream point, which gave the total amplification of the disturbance. A transition point was predicted by the point at which the total amplification became eN. As an example of the calculation, the laminar boundary layer over the surface of the NACA 0012 airfoil with the suction velocity determined by the Michel criterion (ref.2) which could maintain the laminar flow over a full chord length was tested to confirm the very strong stabilizing effect of the suction. The result showed that both the Michel and the eN methods agree well qualitatively, but some uncertainty remains about quantitative agreement.
資料番号: NALSP0005017
レポート番号: NAL SP-5
一次資料へのリンクURLhttps://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=43197&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