Implementation Aspects of Uniform Blowing in Turbulent Boundary Layers

We investigate the active turbulent boundary layer control (BLC) scheme of uniform blowing also known as micro-blowing technique applied on airfoils. In this contribution we will show the path relating numerical investigations to experimental investigations which we are currently preparing. A significant effort was put in understanding the differences previous experimental campaigns showed compared to numerical results. Therefore, we conduct a theoretical analysis of the momentum budget including the fluid utilized for control application. From this we draw a conclusion for the inevitable drag contribution of this control scheme as well as understanding the relation of different drag measurement techniques. We show the application of these findings for a zero pressure gradient turbulent boundary layer flow via Direct Numerical Simulation (DNS). Furthermore we apply a set of Reynolds-Averaged Navier-Stokes (RANS) simulations to show the impact of these findings for varied control parameters in order to demonstrate the significance of the findings for both the relation of measurement quantities as well as the inevitable drag contributions of the support system. ... mehrWith this we give an overview of the prepared experimental setup which we plan on using to validate some of the numerical results in terms of aerodynamic performance enhancement capabilities as well as demonstrate the validity of the concepts regarding the drag relations.