@inproceedings{oai:jaxa.repo.nii.ac.jp:00004387, author = {今村, 太郎 and 平井, 亨 and 榎本, 俊治 and 山本, 一臣 and Imamura, Taro and Hirai, Toru and Enomoto, Shunji and Yamamoto, Kazuomi}, book = {宇宙航空研究開発機構特別資料: 第43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2011論文集, JAXA Special Publication: Proceedings of 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011}, month = {Mar}, note = {第43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2011 (2011年7月7日-8日. 早稲田大学国際会議場) 東京, 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011 (July 7-8, 2011. Waseda University, International Conference Center), Tokyo Japan, In this paper, flow around tandem cylinder is solved using UPACS-LES code developed in JAXA. Several key issues for unsteady flow simulation are investigated by changing the parameters, such as turbulence modeling and grid density. The flow field is compared with the experiment for both far- and near- field. Current results indicate that the calculation of the boundary layer and the shear layer around the cylinders plays important role especially to the near field flow structure while it is less sensitive to the far-field noise. Using LES/RANS hybrid technique with fine grid, which consists of 70 million grid points, near-field flow structures including both steady and unsteady components, show very good agreement with the experiment. Additionally, far-field PSD shows fair agreement with the experiment., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0065207015, レポート番号: JAXA-SP-11-015}, pages = {89--94}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {直列二円柱周り流れ解析における遠方場騒音および近傍流れ場の検証}, volume = {JAXA-SP-11-015}, year = {2012} }