Effect of Rows of Two-Dimensional Square Ribs on Flow Property along Plane Wall

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This paper describes the detailed study of the flow structure over rows of two-dimensional square ribs on a ground plane for various values of S/D, and the optimum value of S/D to augment the turbulence of the free stream. The pitch between the centers of two adjoining square ribs was varied at S/D=2, 3, 4, 5, 7, 9, 13 and 17. The time-mean velocity, static pressure and the velocity vectors were measured by Pitot and static pressure tubes, and a cylindrical yawmeter of 6mm in diameter having three pressure holes. The turbulence intensities and autocorrelation were obtained using the data processing system and the F. F. T. analyzer connected to the hot-wire anemometer. As a result, it is concluded that the pitch ratio S/D=9 is optimum for augmenting the turbulence intensity.
一般社団法人日本機械学会の論文
1993-02-15