スパン方向に配列された二つの乱流斑点の相互干渉

概要

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Interaction phenomena between two turbulent spots were experimentally investigated in a zero pressure gradient laminar boundary layer. The turbulent spots were generated by issuing small air jets from two horizontally displaced holes on a flat plate. As the spots grew downstream, they merged into a larger single spot and the merged spot conformed almost the same outline to the superposition of the individual spots. The mutual spanwise intrusion into the other spot was restrained in a interaction region near the merged part, though the free wing tips on the other sides of each spot grew independently. Apparently, the interaction occurred only in the limited area narrower than the superposed region. There, both the positive and negative peaks of the ensemble-averaged velocity fluctuation of the merged spot increased than the single spot, and the calmed region was elongated while the normal growth was enhanced.
社団法人日本機械学会の論文
1998-11-25