振動翼によって誘起される流れのPIV計測

概要

論文の詳細を見る
Flow induced by oscillating elastic blades in quiescent liquid is investigated using PIV (particle imaging velocimetry). Theoretical prediction and image-measurement of the bending blade motion ranging from zero to 60 Hz in frequency indicate that is has maximum amplitude in the second order resonance mode owing to large added inertia force. PIV measurement is performed to evaluate the agitation structure around the blade with order of 10^6 in Reynolds number which is defined using the frequency f, blade length L and kinematic viscosity ν by Re=fL^2/ν. More than 600 velocity vectors are obtained between two consecutive images by using the Binarized-Image Cross Correlation algorithm. The present results reveal generation of intermittent convection in the region down-stream of the blade, that period is over 10 times as that of oscillating blade. Also, parametirc dependency of induced energy on blade-dimension and forced frequency is shown in this experiment.
一般社団法人日本機械学会の論文
1999-10-25