The Influence of Rotation on Flow in a Long Rectangular Channel: An Experimental Study

摘要

An investigation is reported of the flow regimes and structures in flow through a rectangular channel rotating about an axis perpendicular to the relative velocity vector of the narrow walls of the channel. Flow regimes for the wall layers of the leading and trailing surfaces as functions of the Reynolds Number and a nondimensional rotation parameter are delineated. Flow regime data were obtained primarily from wall-slot dye injection and photography. Mean velocity profiles, wall shear, and reduced pressure across the channel are also given. For no rotation, the flow had a fully developed turbulent mean velocity profile for all cases investigated. As the speed of rotation is increased, important changes in the wall structures, shear, and mean velocity profiles are observed on both walls. (Author)