1701 形状の異なるノズルから噴出させられた噴流の近傍構造に関する実験(2)(OS17-1 超音波を利用した流動場の計測,OS17 超音波を利用した流動場の計測,オーガナイズドセッション)

概要

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Objective in the present study is to examine effects of a horn attached to a circular nozzle on the coherent structures in the near field of an axisymmetric jet. Experiments have been conducted to compare two flow fields issued through a plate nozzle and horn nozzle in a water channel. Reynolds numbers of these flows were low enough to visualize the flow patterns with the dye-injection method and to capture the coherent structures by using an ultrasonic velocity profile (UVP) monitor. Images were reconstructed from the visualized photographs along the line of x/d=20, and from these images for the horn nozzle, a large scale structure was found out. Instantaneous velocity profiles were obtained in the radial directions with UVP, proper orthogonal decomposition was applied to these dataset.
一般社団法人日本機械学会の論文
2006-10-28