Výsledky vyhledávání - "Stefano Meloni"

Akademický článek

Evaluation of Turbulent Jet Characteristic Scales Using Joint Statistical Moments and an Adaptive Time-Frequency Analysis

Autor: Anderson R. Proença, Stefano Meloni

Publikováno v: Fluids, Vol 7, Iss 4, p 125 (2022)

This paper presents an analysis of turbulence characteristic scales and eddy convection velocity of jet flows computed using joint statistical moments, digital filters, and a modified version of the empirical mode decomposition (EMD). The ongoing aim

Externí odkaz: https://doaj.org/article/f53a36a4a5464fe6a383bd4ea68d8eee

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Akademický článek

A Wavelet-Based Time-Frequency Analysis on the Supersonic Jet Noise Features with Chevrons

Autor: Stefano Meloni, Hasan Kamliya Jawahar

Publikováno v: Fluids, Vol 7, Iss 3, p 108 (2022)

A detailed investigation of the statistical properties of the near-field pressure fluctuations induced by an under-expanded jet, by varying the nozzle exit shapes has been presented. Experiments using different convergent Chevron nozzles were carried

Externí odkaz: https://doaj.org/article/9fb4defefea746b290e48c449a71c1c9

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Akademický článek

On the Application of Wavelet Transform in Jet Aeroacoustics

Autor: Roberto Camussi, Stefano Meloni

Publikováno v: Fluids, Vol 6, Iss 8, p 299 (2021)

Wavelet transform has become a common tool for processing non-stationary signals in many different fields. The present paper reports a review of some applications of wavelet in aeroacoustics with a special emphasis on the analysis of experimental dat

Externí odkaz: https://doaj.org/article/853cd13e1008465a84706e15be51e192

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Akademický článek

Single and Multivariate Statistics of Jet-Induced Pressure Fluctuations over an Infinite Plate

Autor: Stefano Meloni, Roberto Camussi, Alessandro Di Marco, Matteo Mancinelli

Publikováno v: Applied Sciences, Vol 10, Iss 13, p 4605 (2020)

Motivated by the problem of the installation effects of modern turbofan engines, we experimentally investigated the interaction between a compressible subsonic jet and a tangential flat plate. Measurements of wall pressure fluctuations were performed

Externí odkaz: https://doaj.org/article/b0a61bfc862d44ba980f56a271e49641

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Data-Driven Multiobjective Optimization of Wave-Packets for Near-Field Subsonic Jet Noise

Autor: Giorgio Palma, Stefano Meloni, Roberto Camussi, Umberto Iemma, Christophe Bogey

Publikováno v: AIAA Journal. 61:2179-2188

Aeroacoustics of innovative aircraft cannot disregard the development of low-order models for the jet noise source, which are essential to assess the propulsion–airframe interactions from the conceptual design stage. The main scope of this work is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8099052d741cf8a9a76ed6fb9254b31
https://doi.org/10.2514/1.j062261

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An experimental investigation into the influence of installed passively controlled jet flows on wall-pressure fluctuations

Autor: Edoardo Carbini, Jack Lawrence, Anderson Proença, Stefano Meloni, Roberto Camussi

Publikováno v: INTER-NOISE and NOISE-CON Congress and Conference Proceedings. 265:2350-2357

Jet-surface interaction(JSI) represents a significant noise problem in the installation of modern ultra-high bypass ratio turbofan engines. The use of chevron nozzles is known to reduce low-frequency jet mixing noise(JM) by increasing the velocity gr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ca31d61d4618a35271e5fe6fc5b961e
https://doi.org/10.3397/in_2022_0335

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Experimental characterisation and data-driven modelling of unsteady wall pressure fields induced by a supersonic jet over a tangential flat plate

Autor: Stefano Meloni, Francesco Centracchio, Elisa de Paola, Roberto Camussi, Umberto Iemma

Publikováno v: Journal of Fluid Mechanics. 958

This work deals with the investigation and modelling of wall pressure fluctuations induced by a supersonic jet over a tangential flat plate. The analysis is performed at several nozzle pressure ratios around the nozzle design Mach number, including s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::057f662e8352d7328df9c3e0efc63173
https://doi.org/10.1017/jfm.2023.84

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Jet noise sources for chevron nozzles in under-expanded condition

Autor: Hasan Kamliya Jawahar, Stefano Meloni, Roberto Camussi

Publikováno v: Kamliya Jawahar, H, Meloni, S & Camussi, R 2022, ' Jet noise sources for chevron nozzles in under-expanded condition ', International Journal of Aeroacoustics, pp. 1-16 . https://doi.org/10.1177/1475472X221101766

Imperfectly expanded jet flows are known to have additional noise sources known as Screech and broadband shock-associated noise. They are generated by the interaction between the instability waves that propagate from the lip of the nozzle and the sho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2215e5ce2bca21f212a92a3d8a86c476
https://research-information.bris.ac.uk/ws/files/321777144/Full_text_PDF_accepted_author_manuscript_.pdf