Numerical Investigation of Flow Control by Passive Blowing

Abstract

Identifying the performance of a free and moving hydrofoil requires extensive numerical and experimental investigations. This research topic is devoted to the study of hydrofoils used in the maritime domain. The stall of the boundary layer poses a problem of instability of the marine vehicle influencing the hydrodynamic performance, for these circumstances a method to force the attachment of these boundary layers by natural means has been proposed. In this context, a hydrofoil model was studied numerically based on a three-dimensional approach using CFD techniques for three configurations of which the first is smooth, the second with three holes and the third with seven holes from the intrados to the extrados inclined 23 ° relative to the X axis. The numerical result shows an advantageous gain in the lift force and a decrease in the drag force.