イワツ レイマ   IWATSU Reima
  岩津 玲磨
   所属   東京電機大学  工学部 機械工学科
   東京電機大学大学院  先端科学技術研究科 機械システム工学専攻
   東京電機大学大学院  工学研究科 機械工学専攻
   職種   教授
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 査読有り
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頁
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 http://www.nagare.or.jp/publication/nagare/archive/2019/3.html