Experiments on Two-Dimensional Impinging Jet on a Wedge : Turbulence Properties in the Case that the Wedge-Surfaces are Symmetrical with respect to the Jet Axis
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概要
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An experimental study has been performed on the turbulence properties of two-dimensional impinging jet on a wedge, in which the angle between the wedge-surface to the jet axis is 45°. The non-dimensional profiles of the turbulence intensities √<u^2>/U_m and √<v^2>/U_m, and the Reynolds-Stress <uv>^^^-/U^2_m in the fully- developed flow region are non-similar and they are different to and larger than those of the two-dimensional wall-jet. It was found from the results on the isopleths of the turbulence intensities and the Reynolds-Stress that the production of the turbulence is large in the impinging region at the vertex of the wedge. In the same region, the uv has negative value over a fairly wide range near the wall. The velocity component in the normal direction to the wall is negative near the vertex of the wedge, and becomes positive in the region of x/b_j≳4.
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