Computational study of acoustic wave receptivity of localized roughness in a compressible boundary layer

• Grant number: 20/04413-1
• Support Opportunities: Scholarships in Brazil - Master
• Start date: September 01, 2020
• End date: July 31, 2021
• Field of knowledge: Engineering - Aerospace Engineering - Aerodynamics
• Principal Investigator: Marcello Augusto Faraco de Medeiros
• Grantee: Pedro Henrique Rosa dos Santos
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Surface imperfections such as roughness may anticipate the laminar-turbulent transition process of the boundary layer. Current theories that predict the transition spot do not have adequate accuracy for the aeronautical design and are semiempirical, which makes the preliminary study phase of new aircraft configurations difficult. One of the problems of the theories used in industry is the prediction of the initial amplitude of the instability waves, which is a function of the flow receptivity to external disturbances. Existing theories of receptivity lack precise experimental data to develop. New experimental methods are emerging, for example in \ cite {Placidi2019}, but need verification of repeatability of results. In this scenario, the proposed work seeks to obtain data about the acoustic wave receptivity on boundary layer roughness from direct numerical simulation of the Navier-Stokes equations. The obtained data will be compared with the data of \ cite {Placidi2019} and will serve for the development and validation of receptivity theories. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SANTOS, Pedro Henrique Rosa dos. Numerical simulation of the receptivity of Tollmien-Schlichting waves due to acoustic waves inciding on rectangular hump and gap in compressible flow. 2022. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.