Ryoyu Systems, Co., Ltd
Aircraft Systems Research Group, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA)
Aircraft Systems Research Group, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA)
Advanced Science & Intelligence Research Institute (ASIRI)
Aerodynamics Research Group, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA)
Propulsion Systems Research Group, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA)
45th Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2013 (July 4-5, 2013. Tower Hall Funabori), Tokyo, Japan
抄録（英）
In this paper, a validation study of aeroacoustics analysis of Rudimentary Landing Gear is conducted using a multi-block structured grid CFD-code, UPACS-LES, developed in JAXA. Sensitivities of the numerical schemes to solve the convective term and the order of the scheme to the flowfield and near-field unsteady pressure are investigated. Improved effects on the result to capture finer vortical structures and to predict far-field noise prediction are shown by the 3rd-order low dissipation SLAU scheme for low-Mach number flow as well as the 6th-order Compact scheme, compared with the 3rd-order Roe scheme. Influence of sound reflection on the floor on the far-field noise prediction is evaluated by Ffowcs Williams and Hawkings code using permeable surface data set in space. In addition, sensitivities of the placement of wake plane of the permeable surface on the far-field noise prediction are investigated with a method to suppress spurious noise due to vortex passing through the wake plane.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
構造格子CFD コードUPACS-LES による四輪型簡易脚形状RLG の空力音響予測の検証
62268002.pdf
(1.27MB)
