Linear stability analysis and large eddy simulations of supersonic flows over airfoils with applications in turbine cascades

• Grant number: 24/21935-2
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: April 01, 2025
• End date: March 31, 2026
• Field of knowledge: Engineering - Aerospace Engineering - Aerodynamics
• Principal Investigator: William Roberto Wolf
• Grantee: Gabriel Yudi Ragni Hamada
• Supervisor: Jean-Christophe Robinet
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Ecole Nationale Supérieure d'Arts et Métiers, France
• Associated to the scholarship: 24/04341-1 - High-fidelity simulations and data-driven analysis of transitional and turbulent compressible flows over airfoils, BP.DR

Abstract

This proposal describes the research plan associated with the overseas internship (BEPE) of Mr. Gabriel Yudi Ragni Hamada, who is currently a PhD student in the School of Mechanical Engineering at University of Campinas, FEM-UNICAMP. The internship period abroad will be held at the DynFluid Laboratory of École Nationale Supérieure d'Arts et Métiers (ENSAM), in Paris, France. During the internship, Mr. Hamada will work under the supervision of Prof. Jean-Christophe Robinet, whose research focuses on stability theory, transition to turbulence, and receptivity, including applications to compressible flows. The project will also count with the collaboration of Dr. Carlos Junqueira-Junior, who has expertise in large-scale high-fidelity simulations. Professor Robinet has an extensive expertise in compressible flows besides linear stability theory, including modal and nonmodal techniques such as global stability, transient growth and resolvent analyses. The main objective of the present work is the investigation of stability and receptivity characteristics of turbulent boundary layers over supersonic turbine cascades. This study is relevant for the development of more efficient high-speed propulsion and power generation systems. The configurations of interest depict shock-boundary layer interactions (SBLIs) over curved surfaces with adverse and favorable pressure gradients. The effects of curvature and pressure gradient on the stability properties of boundary layers is not well understood and this work will address this gap in the literature. Moreover, we will also investigate how wall thermal effects impact the receptivity processes in supersonic turbulent boundary layers.