1502 円柱表面に設けた多層網の空力音及び力の低減効果(J11-1 インピーダンス制御,J11 流体関連の騒音と振動)

概要

論文の詳細を見る
Overlaying an object in a flow with a multi-layered mesh as well as a pile-fabric is expected to be feasible as to reduce aerodynamic noise from the object. The mesh or the fabric weakens the accelerating vortices that are the sources of the sound. Because the vortices produce the pressure distribution around the cylinder, the aerodynamic forces will be also changed by the mesh or the fabric. In this study, aerodynamic forces exerted on circular cylinders whose surfaces were overlaid with multi-layered meshes were measured in a low-noise wind tunnel, and were compared with the forces of cylinders without the meshes. Unsteady forces in the directions parallel and perpendicular to the flow were reduced by the mesh. The drag of the cylinder was proportional to the diameter of the cylinder including the thickness of the mesh.
社団法人日本機械学会の論文
2007-09-07