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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Analysis of Parametrization Methods for Aerodynamic Profiles
Submission Author:
João Victor Barros dos Santos , RJ , Brazil
Co-Authors:
João Victor Barros dos Santos, Vinícius Gomes Pereira Siston, Guilherme Amaral do Prado Campos, José Luiz Zanon Zotin
Presenter: João Victor Barros dos Santos
doi://10.26678/ABCM.ENCIT2020.CIT20-0659
Abstract
There is an incessant search for more efficient aerodynamic profiles in the literature. For this reason, some researchers have implemented optimization methods to find the ideal shape of airfoils. Many of these methods are based on known airfoil groups (NACA, Joukovsky and GOE), witch are defined by mathematical expressions. Also, they are used to reduce the optimization time of the parameterization, whose purpose is to obtain the aerodynamic profiles function with a minimum number of points. With fewer characteristic points of a profile, it is possible to reduce the number of parameters analyzed during optimization. Given the importance of parameterization applications, it is necessary to guarantee a good approximation of the generated profile function with the real one. In this paper, an analysis was made between two methods of parameterization (Bezier and PARSEC), to find which one represents the original airfoil most faithfully. A study was made on the number of ideal control points for a good representation of the aerodynamic profile, seeking a smaller geometric error between the real model and the one parameterized. Besides that, lift and pressure coefficients were compared through simulations in XFOIL. Finally, the two parameterizations presented reliable results. However, a better approximation was achieved with the Bezier method, which required fewer control points. Thus, the Bezier model could be considered the most suitable to be applied in these optimization processes.
Keywords
parameterization of airfoil, Bezier curve, PARSEC, naca
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