Computational study of aeroacoustic effect of a seal located on slat cove and analysis by POD technique

• Grant number: 16/02970-5
• Support Opportunities: Scholarships in Brazil - Master
• Start date: July 01, 2016
• End date: April 30, 2018
• Field of knowledge: Engineering - Aerospace Engineering - Aerodynamics
• Principal Investigator: Marcello Augusto Faraco de Medeiros
• Grantee: Fernando Henrique Tadashi Himeno
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

With the development of environmental protection policy, noise impact caused by aircrafts during take-off and especially during landing (when engines are not in full power) has forced aeroanautical industry to focus on study of techniques and devices that reduce noise generated by highlift surfaces. Slat device present in most modern aircraft, appears as a significant noise generator since it is present in almost all wingspan. This project aims to continue the research study done in just over two years through research financed by FAPESP of simulations using the commercial PowerFLOW code. This project aimed to study aeroacoustic contribution of a seal located on slat cove that has the function of the mechanical isolation. During this research, cases were simulated varying seal's position, height and a range of angles of attack, resulting in a dense database that the extracted the information and conclusions that were relevant considering the project level and deadlines. The results were well seen by reviewer that encouraged to proceed this research in a Master project. Thus, this project aims to continue the post-processing of the cases simulated and continue the investigation of phenomena related to the presence of this kind of excrescence over the slat surface. For that we intend to use advanced processing techniques, known as POD (Proper Orthogonal Decomposition). POD analysis represents a method to study structures present inside flow since it allows to investigate the most significant mechanisms present in the flow phenomena. (AU)

Scientific publications

(5)

(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)

HIMENO, FERNANDO H. T.; SOUZA, DANIEL S.; AMARAL, FILIPE R.; RODRIGUEZ, DANIEL; MEDEIROS, MARCELLO A. F.. SPOD analysis of noise-generating Rossiter modes in a slat with and without a bulb seal. JOURNAL OF FLUID MECHANICS, v. 915, MAR 18 2021. (16/02970-5, 06/52568-7, 19/02203-2, 18/02542-9)

SOUZA, DANIEL S.; RODRIGUEZ, DANIEL; HIMENO, FERNANDO H. T.; MEDEIROS, MARCELLO A. F.. Dynamics of the large-scale structures and associated noise emission in airfoil slats. JOURNAL OF FLUID MECHANICS, v. 875, p. 1004-1034, SEP 25 2019. (16/02970-5, 18/02542-9, 06/52568-7)

DO AMARAL, FILIPE RAMOS; PAGANI JUNIOR, CARLOS DO CARMO; TADASHI HIMENO, FERNANDO HENRIQUE; SOUZA, DANIEL SAMPAIO; FARACO DE MEDEIROS, MARCELLO AUGUSTO. On closed-section wind-tunnel aeroacoustic experiments with a two-dimensional lifting body. APPLIED ACOUSTICS, v. 148, p. 409-422, MAY 2019. (06/52568-7, 16/02970-5)

DO AMARAL, FILIPE RAMOS; TADASHI HIMENO, FERNANDO HENRIQUE; PAGANI, JR., CARLOS DO CARMO; FARACO DE MEDEIROS, MARCELLO AUGUSTO. Slat Noise from an MD30P30N Airfoil at Extreme Angles of Attack. AIAA JOURNAL, v. 56, n. 3, p. 964-978, MAR 2018. (06/52568-7, 16/02970-5)

DO AMARAL, FILIPE RAMOS; TADASHI HIMENO, FERNANDO HENRIQUE; SOUZA, DANIEL SAMPAIO; PAGANI JUNIOR, CARLOS DO CARMO; FARACO DE MEDEIROS, MARCELLO AUGUSTO. Effect of Bubble Seal on Slat Noise. AIAA JOURNAL, v. 57, n. 4, p. 1608-1623, APR 2019. (06/52568-7, 16/02970-5)

Academic Publications

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

HIMENO, Fernando Henrique Tadashi. Study of the effect of bulb seal on the slat noise using numerical simulation. 2018. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.