3725 直列に配置した円柱と翼から発生する後流干渉音に関する研究(J13-4 流動励起騒音(1)(翼&エッジ形状関連),J13 流体関連の騒音と振動)

概要

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The purpose of this study is to investigate the characteristics of aerodynamic sound generated from wake interference of circular cylinder and airfoil vane located in tandem and to clear the generation mechanism of the sound source with discrete frequency. The effects of the interval between the cylinder and the airfoil on the characteristics of aerodynamic sound are investigated by acoustic measurement, flow visualization and exploration test of sound source. The relation between the flow field and the sound field with discrete frequency noise (DFN) is shown, and then it is found that the downstream airfoil works as the sound source of DFN, which has the frequency of vortex shedding from the upstream cylinder, when the interval of two bodies is longer than a critical distance.
社団法人日本機械学会の論文
2006-09-15