S0504-4-2 音波による長方形噴流の制御 : 励起パターンによる噴流特性の変化について(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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Effect of acoustic excitation on rectangular jet characteristics is discussed in this study. Sound wave locally irradiated the jet at a nozzle exit enables 'phase-lock' which means synchronization between flow oscillation and external sound. Therefore, hot-wire measurement by means of phase locking directly provides a phase averaged flow field. We especially focused on the effect of excitation phase difference in spanwise direction on jet characteristics. As a result, jet characteristics vary with change of the excitation pattern. In addition, in-phase jet oscillation is observed in the position of in-phase excitation. Therefore, alternative oscillation and bifurcation are occurred in the spanwise direction.
一般社団法人日本機械学会の論文
2009-09-12