1449 平板後縁近傍の乱流境界層の特性

概要

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The purpose of study is to examine characteristics of the turbulent boundary layer on a flat plate near the trailing edge. Sizes of the flat plate were 2000mm in length, 20mm in thickness, and 350mm in width. Measurements of the turbulent boundary layer on the flat plate, smooth wall, were made in a velocity of 15m/s under the zero-pressure gradient. The displacement thickness and momentum thickness of the turbulent boundary layer decreased near the trailing edge (from approximately 100mm upstream of the trailing edge to the trailing edge). Whereas, mean velocity in the turbulent boundary layer increased near the trailing edge. The velocity distribution near the trailing edge was different from that of fully developed turbulent boundary layer. Static pressure decreased near the trailing edge, as approaches the wall. Negative static pressure at the back of the trailing edge can cause flow acceleration near the wall.
社団法人日本機械学会の論文
2003-08-05