水中熱線流速計による平板境界層遷移域の測定 : 特にハイドロキノン・ディアセテート法との比較について

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Recently, the need of measurements of the boundary layer around a model ship has been stressed in connection with turbulent stimulation used at the ship experimental tank. We measured the transitional flow area in the boundary layer along a flat plate by finding qualitatively the velocity fluctuation through use of hot wire, compared the results with those by the Hydroquinone-diacetate method, and attempted to confirm the accuracy of the latter.The state of the transitional flow in the boundary layer along the flat plate was observed, and the areas of laminar, transitional and turbulent flows on the plate were generally determined.Moreover, it was discovered that the results by the Hydroquinone-diacetate method well agreed with those of the hot wire measurement, thereby making it clear that the area in which the Hydroquinone-diacetate film still remained, was practically identical with the laminar flow area. The Hydroquinone-diacetate method seems, therefore, to possess a fairly great accuracy while it is simple, and the method is worthy of commendation, as most practical for quick detection of the laminar area on various types of models.
社団法人日本船舶海洋工学会の論文