LEBU板を挿入した乱流境界層における熱伝達

概要

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An experimental study was performed to investigate the characteristics of wall skin friction and heat transfer for a flat plate turbulent boundary layer with an insertion of a LEBU (Large Eddy Break-Up) plate. The measured skin friction coefficient in the downstream region of a LEBU plate was confirmed to be reduced by the insertion of a LEBU plate, and the heat transfer was also found to decrease in the same region. It was also found that the dissimilarity between momentum and heat trasport processes was weak. The reduction of the fractional contributions to Reynold's shear stress in the near-wall region from ejection and sweep was concluded to result in the reduction of the skin friction factor and of the heat transfer coefficient when a LEBU plate was inserted. Unlike the case when a cylinder was inserted, interactive fluid motions were not intensified.
1991-05-25