ロックイン現象における振動周波数と渦放出との関係 : 低振動周波数側における2倍の変動周波数について

概要

論文の詳細を見る
In the lower oscillating frequency region of the lock-in phenomenon of a rectangular prism with large oscillation angle, primary frequencies twice and three times the oscillating frequency are observed in the power spectrum of velocity fluctuation measured downstream of the prism. Such harmonic frequencies cause problems in the control of vortex shedding which makes use of the lock-in phenomenon. In this study, the mechanism causing the biharmonic frequency is clarified from digital signal processing of velocity fluctuation obtained by a hot wire probe, such as digital band-pass filtering technique, and from image processing of dye-injected visualization of the separated shear layer.
一般社団法人日本機械学会の論文
1995-06-25