Three-dimensional boundary layer flow with streamwise adverse pressure gradientThe present study examines the effects of a strong adverse pressure gradient on a 3D turbulent boundary layer in an axisymmetric spinning cylinder geometry. Velocity measurements made with a three-component laser Doppler velocimeter include all three mean flow components, all six Reynolds stress components, and all ten triple-product correlations. Total Reynolds shear stress diminishes as the flow becomes 3D. Lower levels of shear stress were found to persist under adverse pressure gradient conditions. This low stress level was observed to roughly correlate with the magnitude of the crossflow. Variations in the pressure gradient do not alter this correlation. It is inferred that a 3D boundary layer is more prone to separate than a 2D boundary layer.
Document ID
19910061658
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Driver, David M. (NASA Ames Research Center Moffett Field, CA, United States)
Johnston, James P. (Stanford University CA, United States)