有限長スリットからの空気の垂直噴射を伴う３次元超音速流れと混合

Abstract

The supersonic flow and mixing fields with a perpendicular air injection from a finite length slit are investigated. Two slit angle cases of 90 and 45 degrees are examined. The experiments and the calculations are performed. In the calculations, the mixing fields can be discussed because the main flow air is treated with the equation different from the one of the injected air. The numerical results agree well with the experimental ones qualitatively and quantitatively. The results of the 90 degrees slit angle case show that the flow and mixing field is three-dimensional because of the existence of the slit ends, even if the slit is fairly long. As regards the 45 degrees case, the fields are more three-dimensional and complicated. All the results show that a part of the main flow which gets into downstream side of the slit influences on the mixing in the higher order than the vortex in the vicinity of the slit ends.