John T. Rettaliata Engineering Center
10 West 32nd Street
Chicago, IL 60616
Armour College of Engineering's Mechanical, Materials & Aerospace Engineering Department will welcome Dr. Ricardo Vinuesa, Assistant Professor at the Linné FLOW Centre from KTH Royal Institute of Technology, Stockholm, Sweden, to present his lecture, New Aircraft Design Paths through Simulations and Experiments of Turbulence.
The present study aims at characterizing the effects of streamwise pressure gradients on the features of turbulent boundary layers (TBLs). Pressure-gradient TBLs are extremely relevant in a number of applications, including the performance of aircraft, trains, turbines or diffusers, among others. Despite the relative wealth of data available in the literature, an accurate characterization of such effects has not yet been achieved, due to the wide range of possible pressure-gradient parameters and to the effect of flow history on the local boundary-layer features. Here we report both direct numerical and large-eddy simulations of the turbulent flow around a NACA4412 wing section, for Reynolds numbers based on inflow velocity and chord length of up to 1 million. These results are complemented with simulations and experiments of turbulent boundary layers developing on a flat plate, subjected to a wide range of streamwise flow histories, defined by the pressure-gradient evolution. Our results have significantly contributed to the understanding of such flow-history effects, including the prediction of skin-friction curves for pressure-gradient TBLs.
Ricardo Vinuesa received his BS in Mechanical Engineering from the Polytechnic University of Valencia (Spain) and holds an MS and a PhD in Mechanical and Aerospace Engineering from the Illinois Institute of Technology (USA), both under the supervision of Prof. Hassan Nagib. His research is focused on the analysis of wall-bounded turbulent flows. He utilizes high-order spectral direct numerical and large-eddy simulations to characterize, among others, flat-plate turbulent boundary layers, and the turbulent flow around wings. In 2014 he joined the Linné FLOW Centre from KTH (Stockholm) as a Postdoctoral Researcher, and he currently works as an Assistant Professor at the same university.