対向形T字合流管内の乱流・混合特性 : 流量比が流動特性に与える影響(流体工学,流体機械)

概要

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We investigated experimentally the unsteady flow in a counter-type T-junction. The T-junction was modeled by a mixing tee with square cross sections, in which the mixing channel was connected with the main and counter channels at right angles. Detailed distribution of velocity data have been measured using PIV. Reynolds number of the main-channel flow was fixed at 3500, and the flow ratio of the counter-channel flow to main one was changed from 1.0 to 5.0. To identify the coherent flow structures, the proper orthogonal decomposition (POD) analysis was applied to the fluctuating velocity field in the mixing channel. Based on the data, the unsteady vortical motion along the shear layer and the wobbling motion of the interface between the main-channel and counter-channel flows are discussed.
社団法人日本機械学会の論文
2006-02-25