Study of numerical techniques for flow analysis and control of airfoils under dynamic stall

• Grant number: 23/13599-0
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Start date: March 01, 2024
• End date: August 31, 2024
• Field of knowledge: Engineering - Aerospace Engineering - Aerodynamics
• Principal Investigator: William Roberto Wolf
• Grantee: Lucas Feitosa de Souza
• Supervisor: Chi-An Yeh
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: North Carolina State University (NC State), United States
• Associated to the scholarship: 22/08567-9 - Numerical investigation of an airfoil under light dynamic stall, BP.MS

Abstract

The current proposal describes the research plan associated to the overseas internship (BEPE) of Lucas Feitosa de Souza, who is currently a MSc student in the School of Mechanical Engineering at University of Campinas, FEM-UNICAMP. The internship period should be held at the North Carolina State University, NCSU, located in Raleigh, NC, USA. During this period, the student will work under the supervision of Prof.Chi-An Yeh in the Mechanical and Aerospace Engineering Department. The main objective of the present work is the study and application of computational techniques for the analysis and control of unsteady flows past airfoils under dynamic stall. This phenomenon 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. Here, high-fidelity numerical simulations will be employed together with linear approaches. The former methodology will provide approximate phase-averaged base flows to be investigated using resolvent analysis, which will then allow the study of optimal flow responses with respect to imposed disturbances. The present framework can provide insights in terms of control strategies for the present unsteady flows. (AU)