García Ruíz, Manuel Julio2016-06-032015620.1064CDG516Chttp://hdl.handle.net/10784/8545The present document deals with the optimization of shape of aerodynamic profiles -- The objective is to reduce the drag coefficient on a given profile without penalising the lift coefficient -- A set of control points defining the geometry are passed and parameterized as a B-Spline curve -- These points are modified automatically by means of CFD analysis -- A given shape is defined by an user and a valid volumetric CFD domain is constructed from this planar data and a set of user-defined parameters -- The construction process involves the usage of 2D and 3D meshing algorithms that were coupled into own- code -- The volume of air surrounding the airfoil and mesh quality are also parametrically defined -- Some standard NACA profiles were used by obtaining first its control points in order to test the algorithm -- Navier-Stokes equations were solved for turbulent, steady-state ow of compressible uids using the k-epsilon model and SIMPLE algorithm -- In order to obtain data for the optimization process an utility to extract drag and lift data from the CFD simulation was added -- After a simulation is run drag and lift data are passed to the optimization process -- A gradient-based method using the steepest descent was implemented in order to define the magnitude and direction of the displacement of each control point -- The control points and other parameters defined as the design variables are iteratively modified in order to achieve an optimum -- Preliminary results on conceptual examples show a decrease in drag and a change in geometry that obeys to aerodynamic behavior principlesspaCFD (Cálculos computacionales de mecánica de fluídos)masterThesisinfo:eu-repo/semantics/openAccessOPTIMIZACIÓN MATEMÁTICAECUACIONES DE NAVIER - STOKESDINÁMICA DE FLUÍDOSAERODINÁMICAMÉTODO DE ELEMENTOS FINITOSSIMULACIÓN POR COMPUTADORESMathematical optimizationNavier-stokes equationsFluid dynamicsAerodynamicsFinite element methodComputer simulationAcceso abierto2016-06-03Giraldo Arias, Santiago