K-1318 中央に配置された長方形切欠による長方形噴流の制御(S15-6 噴流構造とその制御)(S15 噴流・はく離流れの計測と制御)

概要

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The mean flowfield of a three-dimensional turbulent jet issuing from a rectangular nozzle (AR=12.5) with a rectangular notch (AR=2.5 and 7.5) at the midspan was measured experimentally. The experiments were made using an X-type hot wire probe and the linearized constant temperature anemometers to measure streamwise mean velocity, and a 5 holes pitot-static tube to measure spanwise and lateral mean velocities. Reynolds number was kept constant at 30000. The aim of this study is to examine a control for the flowfield of the rectangular jet using a rectangular notch with different aspect ratio. From the results, it is clarified that the development of the present mean flowfield is controlled by the magnitude of aspect ratio of the rectangular notch.
2001-08-22