Application of the Beddoes-Leishman state space model for the analysis of stall-induced oscillations in airfoils

• Grant number: 16/24522-4
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2017
• End date: July 31, 2017
• Field of knowledge: Engineering - Aerospace Engineering - Aerospace Structures
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Flávio Donizeti Marques
• Grantee: Carlos Renan dos Santos
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Aerodynamic and structural nonlinearities influence the aeroelastic behavior of helicopter rotors or wind generators. One phenomenon resulting from the coupling between the aerodynamics and the structural dynamics of these components are the stall-induced limit cycle oscillations, which have been investigated by several researchers. However, the modeling of this phenomenon is still a challenge, and it is crucial to identify the flow velocity from which the oscillations in the limit cycle begin and to characterize these vibrations in terms of amplitudes and frequencies. In this way, the present work proposes the computational implementation in state space representation of the Beddoes-Leishman method for dynamic stall and its coupling to the structural dynamics of a typical aeroelastic section. In addition, it is suggested the realization of experimental tests in order to validate the model and characterize the phenomenon. One contribution of this research work is the development of a tool for simulation of limit cycle oscillations induced by stall, which can be used for both analyses of vibrations in structures and for studies on the energy extraction of these oscillations. (AU)

Scientific publications

(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.. Lift Prediction Including Stall, Using Vortex Lattice Method with Kirchhoff-Based Correction. JOURNAL OF AIRCRAFT, v. 55, n. 2, p. 887-891, MAR 2018. (16/24522-4, 14/21166-7)

DOS SANTOS, CARLOS R.; PEREIRA, DANIEL A.; MARQUES, FLAVIO D.. On limit cycle oscillations of typical aeroelastic section with different preset angles of incidence at low airspeeds. JOURNAL OF FLUIDS AND STRUCTURES, v. 74, p. 19-34, OCT 2017. (16/24522-4)