The Effect of Curvature on the Transition from Laminar to Turbulent Boundary Layer
This is a 1937 NACA Technical Note, issued by the National Advisory Committee for Aeronautics, reporting wind-tunnel research on how curved surfaces shift airflow from smooth laminar to churning turbulent layers. The pages show plates of fan assemblies, a diffuser duct, and graphed test results, so the record is technical and written for aeronautical engineers. Designers can draw on its precise, monochrome engineering photographs of large industrial machinery and clean line graphs with labelled axes and curve families as a model for schematic, diagrammatic plates.
