| Abstract: | An experimental study was made of the wavy motion of a water film flowing concurrently with a turbulent flow of air. The measurements of the parameters of the film were made by an optical method for the absorption of light in a colored film. The sources of monochromatic radiation were heliumneon lasers. Near the curve of neutral stability, the data of the experiment were compared with the results of a calculation in accordance with the linear theory. A plane-parallel flow of a film loses its stability somewhat earlier than is predicted by the linear theory; the divergence decreases with an increase in the thickness of the film. Far from the curve of neutral stability, the simultaneous existence of two groups of waves was observed. |
