S0504-4-6 突起物によるエッジ音の制御に関する研究 : 噴出口長辺方向の渦度分布について(噴流,後流および剥離流れの流動解析と応用(その4))

概要

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The purpose of this study is to suppress edge tone generated by jet-wedge interaction. A passive control was achieved by means of a pair of tabs attached to the center of the nozzle exit, and revealed that the edge tone is reduced by 5dB. Velocity and vorticity measurement was also conducted to clarify the suppression mechanism by use of sound wave excitation. The excitation was synchronized with the self-oscillating flow for selective sampling, so that hot-wire measurement directly provide the phase averaged flow fields. We investigated oscillating phase and vorticity fields. As a result, the difference of flow field between with tabs and without tabs becomes clear.
一般社団法人日本機械学会の論文
2009-09-12