B-313 流れを受動制御してキャビティ音を抑制する試み

概要

論文の詳細を見る
The goal of this research is to find an effective method to suppress the aerodynamic noise over a cavity in a turbulent flow. In our past research, an active control with actuators was carried out, and it was found that the active control has capability of sound depression up to 30 dB. In the process, it was also found that placing the actuators in the cavity itself can reduce the aerodynamic noise even when they are not activated. In this report, the results of passive control experiments are persented. As a experimental result, it is succeeded to reduce the cavity noise up to 65 dB. Moreover, it is shown that the location and the size of the plated inserted the cavity have a strong influence on the noise suppression effect. The results obtained in large wind tunnel experiment are also reported.
日本流体力学会の論文
2003-07-28