C331 二次元翼境界層遷移に対する騒音の影響

概要

論文の詳細を見る
Since 2-D boundary layers are sensitive to external disturbances such as residual velocity fluctuation and acoustic noise, comparative experiments have been made at five different wind tunnels using an identical 2-D wing. The objectives are to construct a database on the characteristics of natural laminar-to-turbulent transition in 2-D boundary layer and to quantitatively evaluate the influence of acoustic noise on transition. The boundary layer is confirmed to have lower transition Reynolds number for the larger free-stream and acoustical disturbances. Artificial sound is introduced to investigate the influence of acoustic noise independent of residual velocity fluctuation, and confirmed to facilitate the transition process. Sound within T-S frequency band is found to be most efficient to lead to earlier transition.
日本流体力学会の論文
2000-07-25