Abstract
Flow structure and the criteria for formation of intake vortices have been studied experimentally and numerically. A particular emphasis is placed on the influence of the inflow property such as shear and nonuniformity on the flow pattern and formation of intake vortex. In the experiment, it is verified that when the inflow contains vorticity or circulation, an intake ' vortex can form. Computational study is made to see if the highly three-dimensional and vortical flow in the intake bay can be predicted. Although there still is a limitation as to the grid density that can be handled with present-day work stations, and intense line vortex cannot be predicted, weak recirculation of the flow can be aptly predicted by the present method.
