一定断面積矩形ダクト内における垂直衝撃波/境界層干渉流れの三次元構造に関する実験的研究(流体工学,流体機械)

概要

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The three-dimensional flow structure induced by normal shock wave/turbulent boundary-layer interaction in a constant area rectangular duct is investigated by a laser-induced fluorescence method. This diagnostic system uses an argon-ion laser as a light source, and the target gas is dry nitrogen with iodine seeded as a fluorescence material. The Mach number distributions in the duct are obtained from the measured fluorescence intensity, and the three-dimensional flow pattern in the expansion region downstream of the initial shock wave is clarified. In addition to this, the region having locally higher Mach number at the duct corners is observed just behind the shock wave, and the three-dimensional shape of the boundary layers induced by the shock wave is found. These flow characteristics are explained with the simple flow model constructed by considering the interaction between two bifurcated shock waves developed on the two perpendicularly adjacent walls.
社団法人日本機械学会の論文
2004-07-25