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Numerical investigation of aircraft landing gear noise

Grant number: 18/11835-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2018
Effective date (End): July 31, 2021
Field of knowledge:Engineering - Aerospace Engineering - Aerodynamics
Principal Investigator:William Roberto Wolf
Grantee:Tulio Rodarte Ricciardi
Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:13/07375-0 - CeMEAI - Center for Mathematical Sciences Applied to Industry, AP.CEPID
Associated scholarship(s):19/20437-0 - Strategies of Flow Control via Resolvent Analysis with Applications in Airframe Noise, BE.EP.DR

Abstract

Aircraft noise is considered one of the most important issues of aviation environmental impact and efforts towards noise reduction are of paramount importance since regulations have become increasingly stringent in order to limit noise levels. In past decades, significant jet noise reduction has been achieved due to the design of more efficient and quieter turbofan engines. Hence, airframe noise, which is associated with the unsteady turbulent flow around the aircraft, has become a significant source of noise, especially at landing configurations. However, reduction of airframe noise is a complex task since its generation may be intrinsically related to the aircraft aerodynamics and structures, such that changes in the high lift system or in the landing gear may impose severe aerodynamic and structural penalties which cannot be overcome. Therefore, improving prediction techniques for airframe noise generation and propagation is a key topic in aeroacoustic research. In this work, we focus on high-fidelity numerical simulations of turbulent flows past nose landing gears. An important research topic in this subject is the assessment of noise sources through advanced post-processing techniques and flow modal decomposition. With the knowledge of how noise is generated in complex geometries, it will be possible to develop strategies and techniques for its reduction. Here, we envision to develop and apply numerical methods to set the best-practices in terms of noise assessment in complex landing gear geometries. Hence, we will investigate aspects related to high-fidelity turbulent flow simulations, techniques for the identification of noise sources in turbulent flows and methodologies of aeroacoustic prediction. (AU)

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Scientific publications (4)
(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)
RICCIARDI, TULIO R.; WOLF, WILLIAM R.; TAIRA, KUNIHIKO. ransition, intermittency and phase interference effects in airfoil secondary tones and acoustic feedback loo. JOURNAL OF FLUID MECHANICS, v. 937, . (19/20437-0, 18/11835-0, 21/06448-0, 13/08293-7)
RICCIARDI, TULIO R.; WOLF, WILLIAM R.; MOFFITT, NICHOLAS J.; KREITZMAN, JORDAN R.; BENT, PAUL. Numerical noise prediction and source identification of a realistic landing gear. Journal of Sound and Vibration, v. 496, . (19/20437-0, 18/11835-0, 13/07375-0, 13/08293-7)
RICCIARDI, TULIO R.; ARIAS-RAMIREZ, WALTER; WOLF, WILLIAM R.. On secondary tones arising in trailing-edge noise at moderate Reynolds numbers. EUROPEAN JOURNAL OF MECHANICS B-FLUIDS, v. 79, p. 54-66, . (18/11835-0, 13/08293-7)
RICCIARDI, TULIO R.; WOLF, WILLIAM R.. Switch of tonal noise generation mechanisms in airfoil transitional flows. PHYSICAL REVIEW FLUIDS, v. 7, n. 8, p. 21-pg., . (18/11835-0, 13/08293-7, 21/06448-0)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
RICCIARDI, Tulio Rodarte. Simulação numérica de alta fidelidade para predição de ruído de trem de pouso. 2021. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica Campinas, SP.

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