Numerical simulation of boundary layers around a circular cylinder

Material type: 文書・図像類

Author: Amalia, Emaほか

Publisher: 航空宇宙技術研究所

Publication date: 2000-12

Material Format: Digital

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Note (General)：: 航空宇宙技術研究所 27-29 Sept.2000 東京日本National Aerospace Laboratory 27-29 Sept.2000 Tokyo Japan3次元境界層の遷移過程を把握するためSIMPLE法を用いて片揺れ円筒周辺の数値シミュレーションを行った。先ず、既報研究で使用...

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Material Type: 文書・図像類
Title: Numerical simulation of boundary layers around a circular cylinder
Author/Editor: Amalia, Ema
久保田, 弘敏
Kubota, Hirotoshi
Author Heading: Amalia, Ema
久保田, 弘敏
Kubota, Hirotoshi
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 2000-12
Publication Date (W3CDTF): 2000-12
Alternative Title: 円筒周辺の境界層の数値シミュレーション
Periodical title: 航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory
No. or year of volume/issue: 48T
Volume: 48T
Pages: 23-24
ISSN (Periodical Title): ISSN : 0289-260X
Text Language Code: eng
Subject Heading: 境界層
数値シミュレーション
SIMPLE法
圧力補正法
遷移過程
片揺れ円筒
非圧縮性ナビエ・ストークス方程式
一般化座標
円筒座標
主流速度
流線曲率不安定性
boundary layer
numerical simulation
SIMPLE method
pressure correction method
transition process
yawed circular cylinder
incompressible Navier Stokes equation
generalized coordinate
cylindrical coordinate
free stream velocity
streamline curvature instability
Target Audience: 一般
Note (General): 航空宇宙技術研究所 27-29 Sept.2000 東京日本
National Aerospace Laboratory 27-29 Sept.2000 Tokyo Japan
3次元境界層の遷移過程を把握するためSIMPLE法を用いて片揺れ円筒周辺の数値シミュレーションを行った。先ず、既報研究で使用した速度による定常条件を評価し、次いで、非定常条件についても評価した。定常条件に対しては一般化座標で、また非定常条件に対しては円筒座標で非圧縮性ナビエ・ストークス方程式を用いた。定常条件の場合には、レイノルズ数220,000の30m/secの主流速度および半円筒型の格子サイズ200×100×60の条件を用いた。TDMA(時分割多元接続)を用いて有限差分方程式を解いた。円筒表面近傍の速度場を検討し、代表的な境界層分布を得た。非定常条件の場合の評価については、円筒型座標形内のナビエ・ストークス方程式に2次差分スキームを適用した場合には、収束結果を得なかった。座標項に対して3次風上スキーム、ならびに拡散項に対して4次中心差分スキームを適用して収束結果を得た。
The numerical simulation around a yawed circular cylinder was carried out using SIMPLE (Semi-Implicit Method for Pressure-Linked Equation) method in order to understand the transition process of three-dimensional boundary layers. First, the steady conditions with velocity used in the previous reports were evaluated, and then unsteady conditions ware also evaluated. The incompressible Navier-Stokes equation was used in generalized coordinate for steady conditions as well as in cylindrical coordinate for unsteady conditions. The conditions of free stream velocity of 30 m/sec with Reynolds number 220,000 and grid size of 200 x 100 x 60 for a half cylinder were used for case of the steady condition. TDMA (Time Division Multiple Access) was used for solving finite difference equations. Velocity field near surface of circular cylinder was investigated, and the typical profile of boundary layer was obtained. For the evaluation of the case of unsteady conditions, when the second order difference scheme was applied to Navier-Stokes equation in cylindrical coordinate form, no convergence results were obtained. The convergence results were obtained by applying the third order upwind scheme for coordinate term, and the fourth order central difference scheme for diffusive term.
資料番号: AA0028637010
レポート番号: NAL SP-48T
Access Restrictions: 限定公開
Periodical Title (NCID): AN10097345
https://ci.nii.ac.jp/ncid/AN10097345
Data Provider (Database): 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）
https://irdb.nii.ac.jp
Original Data Provider (Database): 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