Numerical investigation of an airfoil under light dynamic stall

• Grant number: 22/08567-9
• Support Opportunities: Scholarships in Brazil - Master
• Start date: September 01, 2022
• End date: January 31, 2025
• Field of knowledge: Engineering - Aerospace Engineering - Aerodynamics
• Principal Investigator: William Roberto Wolf
• Grantee: Lucas Feitosa de Souza
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 21/06448-0 - High-fidelity numerical simulations applied in unsteady aerodynamics, turbulence and aeroacoustics, AP.JP2
• Associated scholarship(s): 23/13599-0 - Study of numerical techniques for flow analysis and control of airfoils under dynamic stall, BE.EP.MS

Abstract

Dynamic stall occurs when a moving airfoil rapidly exceeds its static stall angle of attack. The outcome is an increase in the unsteady loads accompanied by large torsional forces and mechanical vibrations on the wing or blade. This condition has significant influence on the performance and fatigue of several mechanical systems, such as helicopter blades, wind turbines and flapping wing aerial vehicles. Hence, the study of dynamic stall on pitching airfoils is of paramount importance to predict the performance parameters. The process of dynamic stall is highly sensitive to flow conditions such as compressibility and inertial/viscous effects, rate of motion and airfoil geometry. The main objective of the present work is the study of airfoils under light dynamic stall for which negative aerodynamic damping occurs. In these cases, the structure absorbs energy from the unsteady aerodynamic flow. High fidelity numerical simulations will be conducted to investigate the effects of compressibility on aerodynamic damping and flow modal decomposition will be employed to understand the relevant frequencies associated with dynamic stall onset.

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)

FEITOSA, LUCAS; MIOTTO, RENATO; WOLF, WILLIAM. Analysis of intermittent vortex pairing for a transitional flow past a NACA0012 airfoil via a multidimensional empirical mode decomposition. AIAA AVIATION FORUM AND ASCEND 2024, v. N/A, p. 9-pg., 2024-01-01. (13/08293-7, 22/09196-4, 21/06448-0, 22/08567-9)

FEITOSA, LUCAS; MIOTTO, RENATO; WOLF, WILLIAM. Analysis of dynamic stall for a simplified single blade vertical axis wind turbine configuration. AIAA AVIATION FORUM AND ASCEND 2024, v. N/A, p. 10-pg., 2024-01-01. (22/08567-9, 13/07375-0, 13/08293-7, 22/09196-4, 21/06448-0)