風洞縮流胴内壁上に存在するゲルトラ渦に関する研究(流体工学,流体機械)

概要

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The boundary layer along a wind-tunnel contraction nozzle is investigated in detail using hotwire anemometry and flow visualization method. It is found that Gortler vortex system exists and develops in the concave wall region of the contraction nozzle. In spite of the flow acceleration by the contraction the distrubance enhanced by the Gortler vortex system travels down even to the test section. We found that this disturbed region at the test section is more than 25% of the cross-sectional area independent of the mean flow velocity. This is due to the large vertical scale of the Gortler vortex system in the concave wall region. This result shows the effects of the Gortler vortex system should be taken into consideration in designing a wind-tunnel contraction nozzle.
一般社団法人日本機械学会の論文
2003-04-25