| 言語種別 | 日本語 |
|---|---|
| 発行・発表の年月 | 2019 |
| 形態種別 | 学術研究論文 |
| 査読 | 査読あり |
| 標題 | アーチェリー矢の側面境界層流れの線形不安定性 |
| 執筆形態 | 共著 |
| 掲載誌名 | ながれ |
| 掲載区分 | 国内 |
| 出版社・発行元 | 日本流体力学会 |
| 巻・号・頁 | 38(3),208-217 |
| 総ページ数 | 10 |
| 担当範囲 | 軸対称基本流の計算 |
| 著者・共著者 | ◎長谷川俊成, 宮嵜武, 田中健太郎, 高橋直也, 岩津玲磨 |
| 概要 | The linear instability of the boundary layer flow formed along an archery arrow is investigated based on
the parallel flow approximation. The present study covers a Reynolds number range 1.0 × 104 ≤ Re ≤ 2.0 × 104(diameter of the arrow shaft being used as the length scale) , whose highest value corresponds to a typical arrow velocity shot from a recurve bow. Two types of points, i.e. streamlined point and bulge, are attached to the arrow head and the axisymmetric basic flows are numerically computed by a stream function-vorticity method. The linear disturbances are Fourier decomposed in the axial and azimuthal directions. A Chebyshev collocation method is used in the radial discretization. The most quickly growing mode has the azimuthal wave number m = 2 and the second and third modes are with m = 1 and m = 3, respectively. We find that the axisymmetric mode with m = 0 never grows in the studied Reynolds number range. These results are common to two types of points. |
| researchmap用URL | https://www.nagare.or.jp/download/noauth.html?d=38-3_gencho.pdf&dir=124 |