JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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Other TitleLarge Eddy Simulation of Vortices from a Blunt tip NACA0012 Airfoil
Author(jpn)今村, 太郎; 平井, 亨; 横川, 譲; 榎本, 俊治; 山本, 一臣
Author(eng)Imamura, Taro; Hirai, Tohru; Yokokawa, Yuzuru; Enomoto, Shunji; Yamamoto, Kazuomi
Author Affiliation(jpn)宇宙航空研究開発機構; 菱友システムズ; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構
Author Affiliation(eng)Japan Aerospace Exploration Agency (JAXA); Ryoyu Systems; Japan Aerospace Exploration Agency (JAXA); Japan Aerospace Exploration Agency (JAXA); Japan Aerospace Exploration Agency (JAXA)
Issue Date2010-02-26
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA special publication: Proceedings fo 41st Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2009
宇宙航空研究開発機構特別資料: 第41回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2009論文集
Publication date2010-02-26
AbstractThree-dimensional unsteady flow around NACA0012 wingtip is simulated numerically to investigate the cause of flap-edge noise generation. The vortical flow structures around the NACA0012 are known to be similar to that of a flap-edge. Therefore, it is assumed that noise generation mechanism is similar as well, although its geometry is simpler than a flap-edge. Since the Reynolds number of the flow is high, a zonal LES/RANS hybrid method is used to reduce the overall computational cost. The power spectral density of the pressure coefficient is compared with the experiment, and several issues regarding, the number of sub iteration for implicit time integration, sensitivity to Smagorinsky constant, grid overlap points at block-block interface, and grid resolution, are discussed. Subsequently, two longitudinal vortical structures around the wingtip, that show different characteristics, are investigated to understand its generation mechanism.
DescriptionOriginal contains color illustrations
Meeting Information: 18 June-19 June, 2009, Japan Aerospace Exploration Agency
形態: カラー図版あり
会議情報: 平成21年6月18-19日. 宇宙航空研究開発機構調布航空宇宙センター
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-09-011

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