稼動突起による軸対称噴流の能動制御の試み : 突起形状と稼動パターンの違いによる噴流構造の変化(流体工学,流体機械)

概要

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For the development of an active control of a turbulent jet, measurements of an axisymmetric turbulent jet are performed with multiple prominences: 90° and 45° delta tabs and vortex generators. Six computer-controlled prominences, which can be driven independently, are installed at the skimmer. First, effects of the shape and number of stationary prominence on turbulent jet are investigated. Then, the prominence that is most effective in the 'stationary mode' is used for the 'moving mode'. Three modes are tested; in the first mode, the prominences are oscillated in phase (axisymmetric mode), in the second mode, single prominence is inserted alternately along the circumference direction (rotational mode), and in the third mode, three adjacent prominences are inserted alternately (alternative mode). Instantaneous streamwise velocities are measured by using hot wire anemometry with an I-type probe. The results show the significant influence of moving prominences on turbulent jet field.
社団法人日本機械学会の論文
2009-06-25