はく離の前兆を捉えた境界層能動制御システムの開発

概要

論文の詳細を見る
Longitudinal vortices produced by the interaction between jets and a free stream are useful to enhance the boundary layer mixing and have proven effective in the control of flow separation. This technique is known as the vortex generator jet method. The vortex generator jet method is an active control technique that provides a time-varying control action to optimize performance under a wide range of flow conditions because the strength of longitudinal vortices can be adjusted by varying the jet speed. In the present study, an active separation control system using vortex generator jets has been developed and can be practically applied to the flow separation control of a two-dimensional diffuser. The proposed system can be operated just before the onset of flow separation, and the separation control is always attained with no flow separation. For the proposed system, if the system starts the operation just before the onset of separation, the total amount of energy to suppress separation can be reduced in contrast to the original feedback system, which starts the operation after separation occurs.
ターボ機械協会の論文
2008-12-10