Diverging boundary layers with zero streamwise pressure gradientThe effects of spanwise divergence on the boundary layer forming between a pair of embedded streamwise vortices with the common flow between them directed toward the wall was studied. Measurements indicate that divergence controls the rate of development of the boundary layer and that large divergence significantly retards boundary layer growth and enhances skin friction. For strongly diverging boundary layers, divergence accounts for nearly all of the local skin friction. Even with divergence, however, the local similarity relationships for two-dimensional boundary layers are satisfactory. Although divergence modifies the mean development of the boundary layer, it does not significantly modify the turbulence structure. In the present experiments with a zero streamwise pressure gradient, it was found that spanwise divergence dit not significantly affect the Reynolds stress and the turbulent triple product distributions.
Document ID
19890037747
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pauley, Wayne R. (Pennsylvania State University University Park, United States)
Eaton, John K. (Stanford University CA, United States)
Cutler, Andrew D. (NASA Langley Research Center; George Washington University Hampton, VA, United States)