Relevant bibliographies by topics / Turbofan intake noise radiation

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Academic literature on the topic 'Turbofan intake noise radiation'

Author: Grafiati
Published: 8 June 2024
Last updated: 31 July 2025

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Journal articles on the topic "Turbofan intake noise radiation"

1

Palma, Giorgio, Lorenzo Burghignoli, Francesco Centracchio, and Umberto Iemma. "Innovative Acoustic Treatments of Nacelle Intakes Based on Optimised Metamaterials." Aerospace 8, no. 10 (2021): 296. http://dx.doi.org/10.3390/aerospace8100296.

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Modern turbofans with high bypass ratios, low blade passage frequencies and short nacelles require continuous development of acoustic linings to achieve the noise reductions expected by the international aviation authorities. Metamaterials and metafluids have been recently proposed as promising technologies for designing innovative acoustic treatments dedicated to reducing aeronautic turbofan noise emissions. In this work, a phase-gradient metasurface treatment is investigated as a way to tackle the noise radiation from an axially symmetric nacelle. This paper aims to study the potential benef
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Guérin, S., and A. Holewa. "Fan tonal noise from aircraft aeroengines with short intake: A study at approach." International Journal of Aeroacoustics 17, no. 6-8 (2018): 600–623. http://dx.doi.org/10.1177/1475472x18789001.

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This work assesses the risks of increased fan noise for high bypass ratio aeroengines with short intakes. The close proximity between the fan and inlet contributes to the increase in radiation of the rotor-alone tones and reinforces the interaction of the inflow distortion with the fan. Thus, the closer the fan is to the inlet, the higher the risk for noise generation. This article discusses the results of Harmonic Balance simulations performed on a conceptual turbofan operated at the approach condition. The inflow distortion created by the nacelle incidence is dominated by the circumferential
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Groeneweg, J. F., and E. J. Rice. "Aircraft Turbofan Noise." Journal of Turbomachinery 109, no. 1 (1987): 130–41. http://dx.doi.org/10.1115/1.3262058.

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Recent advances in the understanding of turbofan noise generation and suppression in aircraft engines are reviewed with particular emphasis on NASA research. The review addresses each link in the chain of physical processes which connect unsteady flow interactions with fan blades to far field noise. Mechanism identification and description, duct propagation, radiation, and acoustic suppression are discussed. Recent advances in the experimental technique of fan inflow control assure that inflight generation mechanisms are not masked by extraneous sources in static tests. Rotor blade surface pre
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Özyörük, Y., E. Alpman, V. Ahuja, and L. N. Long. "Frequency-domain prediction of turbofan noise radiation." Journal of Sound and Vibration 270, no. 4-5 (2004): 933–50. http://dx.doi.org/10.1016/s0022-460x(03)00640-0.

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Korotin, P. I., O. A. Potapov, G. E. Fiks, I. S. Fiks, Ia S. Pochkin, and I. D. Khaletskii. "Active noise suppression in the model of turbofan intake duct." Aviation Engines, no. 2 (2021): 7–16. http://dx.doi.org/10.54349/26586061_2021_2_7.

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Polacsek, C., and S. Burguburu. "Fan Interaction Noise Predictions Using RANS-BEM Coupling." International Journal of Aeroacoustics 4, no. 1-2 (2005): 153–67. http://dx.doi.org/10.1260/1475472053729987.

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A source-to-far-field computation procedure aiming at predicting the noise generated by rotor-stator fan interactions and inlet noise radiation is presented here. It is applied to the NLR turbofan model, tested in DNW-LLF anechoic chamber under the framework of DUCAT project. The unsteady aerodynamic input for the acoustic computation is obtained using a 3D RANS code, CANARI, developed at ONERA for turbomachinery applications. The CFD solutions are coupled, using a modal expansion approach, to a BEM code, solving the Helmholtz equation in an arbitrary bounded space. A single interacting cut-on
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Rouvas, D.-M., and A. McAlpine. "Prediction of Fan Tone Radiation Scattered By A Cylindrical Fuselage." IOP Conference Series: Materials Science and Engineering 1226, no. 1 (2022): 012050. http://dx.doi.org/10.1088/1757-899x/1226/1/012050.

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Abstract A theoretical prediction method of the scattering of fan tone radiation from a turbofan inlet duct by the airframe fuselage is presented. The fan tone noise is modelled by an acoustic disc source that represents the sound field at the inlet duct termination. Adjacent to the source is a cylindrical fuselage that scatters the fan tone radiation. The prediction method is valid for upstream sound radiation. The acoustic pressure on the cylindrical fuselage is affected by refraction of the sound as it propagates through the fuselage boundary layer. This effect known as boundary layer shiel
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Parrett, A. V., and W. Eversman. "Wave envelope and finite element approximations for turbofan noise radiation in flight." AIAA Journal 24, no. 5 (1986): 753–60. http://dx.doi.org/10.2514/3.9342.

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Kholodov, Pavel, and Stéphane Moreau. "Identification of Noise Sources in a Realistic Turbofan Rotor Using Large Eddy Simulation." Acoustics 2, no. 3 (2020): 691–706. http://dx.doi.org/10.3390/acoustics2030037.

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Large Eddy Simulation is performed using the NASA Source Diagnostic Test turbofan at approach conditions (62% of the design speed). The simulation is performed in a periodic domain containing one fan blade (rotor-alone configuration). The aerodynamic and acoustic results are compared with experimental data. The dilatation field and the dynamic mode decomposition (DMD) are employed to reveal the noise sources around the rotor. The trailing-edge radiation is effective starting from 50% of span. The strongest DMD modes come from the tip region. Two major noise contributors are shown, the first be
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Duta, M. C., and M. B. Giles. "A three-dimensional hybrid finite element/spectral analysis of noise radiation from turbofan inlets." Journal of Sound and Vibration 296, no. 3 (2006): 623–42. http://dx.doi.org/10.1016/j.jsv.2006.03.006.

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Dissertations / Theses on the topic "Turbofan intake noise radiation"

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Ulusoy, Yavuz Barbaros. "Frequency Domain Computation Of Turbofan Exhaust Noise Radiation." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607234/index.pdf.

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In this study, acoustic noise radiation through a duct in frequency domain is analyzed. Frequency domain linearized Euler equations are solved for turbofan exhaust noise propagation and radiation. The geometry in studied cases is assumed as axisymmetric. The acoustic waves are decomposed into periodic azimuthal modes. Characteristic boundary conditions, and buffer zone boundary conditions are employed. Iterative type pseudo time integration is employed. Nonuniform background flow effect on the radiation pattern is experienced. All computations are performed in parallel using MPI library routin
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Kewin, Matthew Fergus. "Acoustic liner optimisation and noise propagation through turbofan engine intake ducts." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/366367/.

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The research in this thesis explores the prediction of fan noise propagation through turbofan engine intakes and its radiation to the far-field. The performance of acoustic liners installed in intakes to attenuate noise is the focus of the study. A commercial CAA (Computational AeroAcoustics) code ACTRAN/TM and an in-house shell code ANPRORAD developed at the ISVR are used to predict the performance of acoustic liners throughout the studies presented in this thesis. An automated system for running computations for a large number of cases with different liner impedance and engine operating cond
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Detwiler, Kevin P. "Reduced fan noise radiation from a supersonic inlet." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09192009-040457/.

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de, la Riva Diego Horacio. "Modeling of Herschel/Quincke-Liner Systems for the Control of Aft Fan Radiation in Turbofan Engines." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28080.

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Commercial aviation transportation has experienced an overwhelming growth over the years. However, this expansion has encountered an important barrier: noise. Several studies have shown that residents in these areas experience problems such as stress and sleep disturbance. These problems have translated into demands for a better quality of life from airport residents which in turn have translated into more stringent aircraft noise regulations. As a result, large amounts of resources have been diverted towards the improvement of existing noise attenuation technologies and the development of mor
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Marchner, Philippe. "Non-reflecting boundary conditions and domain decomposition methods for industrial flow acoustics." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0094.

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Ce travail de thèse est consacré aux méthodes de décomposition de domaine de Schwarz sans recouvrement pour la résolution de problèmes industriels hautes fréquences d'acoustique en écoulement. Les méthodes de résolution en régime harmonique sont difficiles à paralléliser en raison de leur caractère oscillatoire, si bien que les méthodes actuelles sont limitées par une fréquence maximale, imposée par la mémoire disponible de l'ordinateur. Les méthodes de Schwarz sans recouvrement divisent le domaine en sous-domaines d'un point de vue continu et fournissent un cadre approprié en vue d'une parall
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Mertens, Tanguy. "A new mapped infinite partition of unity method for convected acoustical radiation in infinite domains." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210365.

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Résumé:<p><p>Cette dissertation s’intéresse aux méthodes numériques dans le domaine de l’acoustique. Les propriétés acoustiques d’un produit sont devenues une part intégrante de la conception. En effet, de nos jours le bruit est perçu comme une nuisance par le consommateur et constitue un critère de vente. Il y a de plus des normes à respecter. Les méthodes numériques permettent de prédire la propagation sonore et constitue dès lors un outil de conception incontournable pour réduire le temps et les coûts de développement d’un produit.<p><p>Cette dissertation considère la propagation d’ondes ac
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Books on the topic "Turbofan intake noise radiation"

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Center, NASA Glenn Research, ed. Turbofan noise propagation and radiation at high frequencies. National Aeronautics and Space Administration, Glenn Research Center, 2003.

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Computation of noise radiation from turbofans: A parametric study. National Aeronautics and Space Administration, 1995.

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Computation of noise radiation from turbofans: A parametric study. National Aeronautics and Space Administration, 1995.

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Fan noise prediction system development: Source/radiation field coupling and workstation conversion for the acoustic radiation code. National Aeronautics and Space Administration, 1993.

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Conference papers on the topic "Turbofan intake noise radiation"

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Zhang, Xinwen, Changchun Liu, and Bing Lin. "Prediction of Engine Intake Noise with Discontinuous Least-Square Finite Element Method in Frequency Domain Acoustics." In GPPS Xi'an21. GPPS, 2022. http://dx.doi.org/10.33737/gpps21-tc-195.

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In the frame of efficient passive treatment, intake noise prediction needs improving. This paper presents a novel numerical method for predicting acoustic propagation from axisymmetric ducted fans of high bypass ratio turbofan engine. Non-uniform mean flow convection and acoustic liner treatment is included. The linearized Euler equations are solved in the frequency domain. The spatial discretization is conducted with the discontinuous least-square finite element method so that the resulting algebraic equation is Hermitian conjugate symmetric. Moreover, the high-order accuracy and hp refinemen
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2

Doherty, Martin, and Howoong Namgoong. "Impact of Turbofan Intake Distortion on Fan Noise Propagation and Generation." In 22nd AIAA/CEAS Aeroacoustics Conference. American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-2841.

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Xiong, Lei, Rie Sugimoto, and Erika Quaranta. "Effects of turbofan engine intake droop and length on fan tone noise." In 25th AIAA/CEAS Aeroacoustics Conference. American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-2581.

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Ait-Ali-Yahia, D., D. Stanescu, W. Habashi, and M. Robichaud. "Axisymmetric computations of fan noise radiation from turbofan inlets." In 37th Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-483.

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Casalino, Damiano, and Mattia Barbarino. "Turbofan Aft Noise Radiation: Progress Towards a Realistic CAA Simulation." In 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference). American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-2882.

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Mincu, Daniel-Ciprian, Eric Manoha, Gabriel Reboul, Stephane Redonnet, and Sebastian Pascal. "Numerical simulation of broadband aft fan noise radiation for turbofan with scarfed nozzle." In 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference). American Institute of Aeronautics and Astronautics, 2011. http://dx.doi.org/10.2514/6.2011-2941.

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Ozyoruk, Yusuf, and Stephane Lidoine. "Numerical Analysis of Noise Radiation from a Turbofan Exhaust Cowl with an Extended Liner in Flight." In 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference). American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-2880.

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Rousselot, S., D. Truffi, G. Doulgeris, S. Mistry, V. Pachidis, and P. Pilidis. "Generation of a Quasi 3-D Map of a Half-Embedded Ultra High Bypass Ratio Turbofan Intake on the Wing of a Broad Delta Wing Airframe." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51008.

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The need for low fuel consumption, emissions and noise drives future propulsion systems towards ultra high bypass ratio turbofan configurations. One of the arising challenges is the installation of such an engine, due to its high diameter. An alternative to under-the-wing podded installation is half embedding it into a thick wing. An ideal airframe has been found to be the Broad Delta (BD) wing, featuring high wing-root thickness. Two conventional nacelles have been integrated into each wing of a four-engine BD body. The performance of a half embedded turbofan intake has been studied, with the
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Sugimoto, Rie, Alexander O. James, Alan McAlpine, and Richard J. Astley. "CFD/CAA coupling for the prediction of fan tone noise propagation and radiation through a drooped intake." In 28th AIAA/CEAS Aeroacoustics 2022 Conference. American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-3100.

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B., RajaGopal, Santosh Gannu, Abhilash M, GS Krishnamurthy, and Rod Giles. "Pass-by Noise Prediction of a Vehicle." In Small Engine Technology Conference & Exposition. Society of Automotive Engineers of Japan, 2020. http://dx.doi.org/10.4271/2019-32-0593.

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&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;The forthcoming pass-by noise regulations have impacted the automotive sector, which further leads to the reduction of noise in the vehicle. The prediction of pass-by noise at an early stage will reduce the overall cost as well as time for an automobile industry and helps to reduce the overall product development life cycle. This supports the design activities of a vehicle.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;Msc ACTRAN/NASTRAN/ADAMS and GT Suite are major tools used in the present study to develop a simulat
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