Laboratory of Aeronautical Sciences

• Mach number effects on shock-boundary layer interactions over curved surfaces of supersonic turbine cascades

  The effects of inlet Mach number on the unsteadiness of shock-boundary layer interactions (SBLIs) over curved surfaces are investigated for a supersonic turbine cascade using wall-resolved large eddy simulations. Three inlet Mach numbers, 1.85, 2.00, and 2.15 are considered at a chord-based Reynolds number 395000. The curved walls of the airfoil... Read More

• Neural networks in feedback for flow analysis and control

  This work presents a methodology for analysis and control of nonlinear fluid systems using neural networks. The approach is demonstrated in four different study cases: the Lorenz system, a modified version of the Kuramoto-Sivashinsky equation, a streamwise-periodic two-dimensional channel flow, and a confined cylinder flow. Neural networks are t... Read More

• Analysis of transient and intermittent flows using a multidimensional empirical mode decomposition

  Modal decomposition techniques are important tools for the analysis of unsteady flows and, in order to provide meaningful insights with respect to coherent structures and their characteristic frequencies, the modes must possess a robust spatial support. In this context, although widely used, methods based on singular value decomposition (SVD) ma... Read More

• Embedded shear layers in turbulent boundary layers of a NACA0012 airfoil at high angles of attack

  An investigation of turbulent boundary layers (TBLs) is presented for a NACA0012 airfoil at angles of attack 9 and 12 deg. Wall-resolved large eddy simulations (LES) are conducted for a freestream Mach number M= 0. 2 and chord-based Reynolds number R e= 4× 1 0 5, where the boundary layers are tripped near the airfoil leading edge on the suction ... Read More

• A Study on the Impact of Radiative Heat Transfer for Hypersonic Nonequilibrium Flows over a Cylinder

  Hypersonic flow over a cylinder is modeled using the finite volume method to solve the Navier-Stokes equations, including Park’s two-temperature model for chemical dissociation. The main focus of this work is to carry out a comparative analysis of the thermodynamic nonequilibrium properties along the flow stagnation line, and obtain the infrared... Read More