2714 円柱表面に設置した多層網による空力音及び力の低減効果に関する数値解析(J20-3 流体関連の騒音と振動(3) 流れの制御と騒音,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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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 calculated in CFD simulation. Unsteady forces in the directions parallel and perpendicular to the flow were reduced by the mesh. The reduction in unsteady forces is attributed to the turbulent intensity and velocity gradient.
社団法人日本機械学会の論文
2008-08-02