音波による噴流構造の制御 : 第1報,励起モードによる噴流構造の相違について

概要

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Acoustic excitation of velocity components was experimentally examined in a two-dimensional plane jet with a parabolic velocity profile with respect to its symmetrical or anti-symmetrical fluctuation mode. Fluid dynamical features of the excited jets were inspected using hot wire anemometers with respect to mean velocity profile and distributions of turbulence intensities and Reynolds stress. The turbulent quantities of the excited jets were compared with those of the natural jet without excitation. The acoustic excitation method proved useful for distinguishing the differences more clearly with respect to the fundamental characteristics of the flow field about the jet and the aspects of its transition into turbulence. The present results suggest a good possibility to regulate jet structure by sound wave with these two modes.
社団法人日本機械学会の論文
1988-08-25