Abstract
The formation and development of oblique Tollmien-Schlichting waves around a turbulence wedge have been investigated in a radial liquid film flow. The liquid film flow was formed of water discharged to the atmosphere from a narrow cylindrical gap between the end of a pipe and a smooth surface of a disk. The turbulence wedge was generated artificially by a water jet injection into the laminar region of the liquid film flow through a small hole in the disk. The behavior of oblique T-S waves around the turbulence wedge was observed by means of high-speed photography. In addition to the observation, downstream development of the oblique T-S waves was calculated on the basis of a linear stability theory. For both the shape of the oblique T-S waves and the manner of the oblique T-S waves spreading outward on the way downstream, the calculation gave a good agreement with the experimentally observed result.
