くさび面の二次元衝突噴流に関する実験 : 平均流の特性

抄録

An experimental study has been performed on the mean flow properties of the two-dimensional impinging jets on a wedge whose included angle is 90°. The variations in static pressure along the streamwise and transverse directions are large near the vertex of the wedge, and should not be neglected in calculations for these flows. The non-dimensional velocity profiles in the fully-developed-flow region far from the vertex do not coincide with the similarity profile of the two-dimensional wall-jet. Also the trends in the decay of the maximum velocities and in the growth of the half width of the present wall-jets are different to those of the two-dimensional wall jets. The local skin friction coefficients are estimated and compared with the empirical formula proposed by several authors. The logarithmic velocity distribution is examined by using the estimated values of the skin friction coefficients.