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Airfoil unsteady aerodynamic loading assessment under dynamic stall for semi-empirical model validation

Grant number: 17/02926-9
Support type:Regular Research Grants
Duration: August 01, 2017 - March 31, 2021
Field of knowledge:Engineering - Aerospace Engineering - Aerospace Structures
Principal researcher:Flávio Donizeti Marques
Grantee:Flávio Donizeti Marques
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The dynamic stall phenomenon is present in many engineering problems and its prediction represents a great modeling challenge. Working airfoils in the dynamic stall condition can lead to serious aeroelastic vibration problems or loss of aerodynamic efficiency. The various physical events that result from airfoils dynamic stall imply in difficulties in the preparation of a mathematical model using the general theory of flows of fluid mechanics. The usual alternative for dynamic stall analysis and modeling is the direct observation of phenomena through experiments. The objective of this research proposal is the survey of the unsteady aerodynamic loading of an airfoil in pitching and translational motions during the dynamic stall regime. The collected load signals will also serve to adjust semi-empirical models based on the Beddoes-Leishman and ONERA methods. The aerodynamic force measurement device is composed of a rigid airfoil mounted in a mechanic system prepared to perform prescribed pitch movements and translations transverse to the flow of a blowing wind tunnel. Force and torque sensors and accelerometers are used to capture the total and inertial forces acting upon the airfoil. The movements of the airfoil will be guaranteed by electric motors and linear guides for the translations. Dynamic stall experiments and studies are few in Brazil, but the field has been of great worldwide interest. The proposition of both pitching and translational movements for the dynamic stall problem also does not yet present many results in the technical literature, therefore, there is a potential in this proposal for relevant contributions for the scientific community. (AU)

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Scientific publications (12)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DOS SANTOS, CARLOS R.; MARQUES, FLAVIO D.; HAJJ, MUHAMMAD R.. The effects of structural and aerodynamic nonlinearities on the energy harvesting from airfoil stall-induced oscillations. JOURNAL OF VIBRATION AND CONTROL, v. 25, n. 14, p. 1991-2007, . (17/02926-9, 17/09468-6)
DE PAULA, N. C. G.; MARQUES, F. D.. Multi-variable Volterra kernels identification using time-delay neural networks: application to unsteady aerodynamic loading. NONLINEAR DYNAMICS, v. 97, n. 1, p. 767-780, . (17/02926-9)
DOS SANTOS, CARLOS R.; DA SILVA, MAIRA M.; MARQUES, FLAVIO D.. Optimization of Energy Harvesting From Stall-Induced Oscillations Using the Multidimensional Kriging Metamodel. Journal of Computational and Nonlinear Dynamics, v. 14, n. 7, . (17/02926-9, 17/09468-6)
DOS SANTOS, L. G. P.; MARQUES, F. D.. Nonlinear aeroelastic analysis of airfoil section under stall flutter oscillations and gust loads. JOURNAL OF FLUIDS AND STRUCTURES, v. 102, . (17/02926-9)
DOS SANTOS, L. G. P.; MARQUES, F. D.. Improvements on the Beddoes-Leishman dynamic stall model for low speed applications. JOURNAL OF FLUIDS AND STRUCTURES, v. 106, . (17/02926-9)
GUIMARAES, T. A. M.; MARQUES, F. D.; FERREIRA, A. J. M.. On the modeling of nonlinear supersonic flutter of multibay composite panels. COMPOSITE STRUCTURES, v. 232, . (17/02926-9)
GUIMARAES, THIAGO A. M.; SANCHES, LEONARDO; MARQUES, FLAVIO D.. Nonlinear supersonic post-flutter motion of panels with adjacent bays and thermal effects. INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, v. 125, . (17/26284-6, 17/02926-9)
DE PAULA, NATALIA C. G.; MARQUES, FLAVIO D.; SILVA, WALTER A.. Volterra Kernels Assessment via Time-Delay Neural Networks for Nonlinear Unsteady Aerodynamic Loading Identification. AIAA JOURNAL, v. 57, n. 4, p. 1725-1735, . (17/02926-9)
IZQUIERDO, DAVID O. D.; MARQUES, FLAVIO D.. Experimental analysis of passive bio-inspired covert feathers for stall and post-stall performance enhancement. MECCANICA, v. 56, n. 11, . (17/02926-9)
DA SILVA, JOSE AUGUSTO I.; MARQUES, FLAVIO D.. Multi-degree of freedom nonlinear energy sinks for passive control of vortex-induced vibrations in a sprung cylinder. ACTA MECHANICA, v. 232, n. 10, . (19/05410-9, 17/02926-9)
SANCHES, LEONARDO; GUIMARAES, THIAGO A. M.; MARQUES, FLAVIO D.. Aeroelastic tailoring of nonlinear typical section using the method of multiple scales to predict post-flutter stable LCOs. AEROSPACE SCIENCE AND TECHNOLOGY, v. 90, p. 157-168, . (17/02926-9)
DOS SANTOS, L. G. P.; MARQUES, F. D.; VASCONCELLOS, R. M. G.. ynamical characterization of fully nonlinear, nonsmooth, stall fluttering airfoil system. NONLINEAR DYNAMICS, v. 107, n. 3, . (17/02926-9)

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