埋め込み境界法と移動格子によるCaradonna-Tung回転翼の非定常乱流解析

菅谷, 圭祐, 今村, 太郎, SUGAYA, Keisuke, IMAMURA, Taro

第53回流体力学講演会/第39回航空宇宙数値シミュレーション技術シンポジウム (2021年6月30日-7月2日. 日本航空宇宙学会 : 宇宙航空研究開発機構(JAXA)オンライン会議)

The 53rd Fluid Dynamics Conference / the 39th Aerospace Numerical Simulation Symposium (June 30 - July 2, 2021. The Japan Society for Aeronautical and Space Sciences : Japan Aerospace Exploration Agency (JAXA), Online meeting)

The purpose of this study is to investigate the influence of the grid setting and the numerical scheme on the unsteady turbulent flow analysis of the Caradonna-Tung rotor using the moving Cartesian grid with the immersed boundary method. Two types of grids with locally refined regions around the rotor wake are used; the shape of the refinement of one grid is cylindrical, and that of the other is rectangular. Meanwhile, the conventional second-order scheme and the high-order scheme are used to evaluate the inviscid flux. In all simulation results, helical vortices from the blade tips appear. Furthermore, the secondary vortex that entangles two tip vortices is observed by using the high-order scheme. However, when the grid with the cylindrical refined region and the high-order method are combined, unphysical vortices are observed around the cell faces where the cell size changes. By contrast, this phenomenon is not observed in the simulation using the grid with the rectangular region and high-order scheme. Therefore, the grid with a rectangular refined region is more appropriate for the numerical simulation of rotor blades than the grid with a cylindrical refined region.

形態: カラー図版あり

Physical characteristics: Original contains color illustrations

資料番号: AA2130027018

レポート番号: JAXA-SP-21-008

埋め込み境界法と移動格子によるCaradonna-Tung回転翼の非定常乱流解析

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埋め込み境界法と移動格子によるCaradonna-Tung回転翼の非定常乱流解析

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収録刊行物

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書き出し

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