Výsledky vyhledávání - "Benjamin Faßmann"

A HIERARCHICAL APPROACH TO DETERMINING ACOUSTIC ABSORPTION PROPERTIES OF POROUS MEDIA COMBINING PORE-RESOLVED AND MACROSCOPIC MODELS

Autor: Manfred Krafczyk, Katherina Rurkowska, Nicolas Lippitz, S. Uphoff, Konstantin Kutscher, Sabine C. Langer, Benjamin Faßmann

Publikováno v: Journal of Porous Media. 21:83-100

Acoustic properties of porous media are very important for numerous industrial applications, the typical goal being to maximize broadband absorption to decrease the sound pressure level of the engineering system under consideration. Up to now acousti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bb877c4d9f954ce5c4a25cfcc21da67
https://doi.org/10.1615/jpormedia.v21.i1.50

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Emulation of Sound Pressure Level Spectra Based on Numerical Data

Autor: Michaela Herr, Benjamin Faßmann, Roland Ewert, Jan Werner Delfs

Publikováno v: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ISBN: 9783030252526

A largely non-empirical method is presented for the prediction of the total sound emission of a wind turbine. The method is based on acoustic 2D high-fidelity simulations providing sound spectra and directivity functions. The computational effort is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81d3044243a753df041c9ef73f71055e
https://elib.dlr.de/132043/

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Noise Reduction Technologies for Wind Turbines

Autor: Benjamin Faßmann, Roland Ewert, Michaela Herr, Claas-Hinrik Rohardt, Alexandre Suryadi, Susanne Martens, Christof Rautmann

Publikováno v: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ISBN: 9783319645186

Results from a numerical and experimental aeroacoustic assessment of 2D wind turbine blade sections are presented. CFD/CAA-based predictions using a synthetic turbulence method were conducted at a NACA 64-618 profile as well as at a new low-noise air

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8a97d4e26dfa93dbcd8e62b4e76225f
https://doi.org/10.1007/978-3-319-64519-3_55

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Numerical airfoil catalogue including 360° airfoil polars and aeroacoustic footprints

Autor: Benjamin Faßmann, Gerrit Heilers, Manfred Imiela, Gunther Wilke

A methodology is presented for generating 360° airfoil polars and aeroacoustic characteristics by means of CFD and CAA. The aerodynamic procedure is validated against experimental data of the well-known airfoils DU-93-W-210 and DU-97-W-300. While a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ab747f5021bb4006e7805594d754431
https://elib.dlr.de/117931/

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High Velocity Impingement of Single Droplets on a Dry Smooth Surface

Autor: Stephan Bansmer, Rolf Radespiel, Michael Hartmann, Thorsten J. Möller, Benjamin Faßmann

The vertical impact of single, mono disperse water droplets on a dry smooth surface was studied experimentally by means of shadowgraphy. A glass substrate was mounted on a rotating wheel to obtain high impact velocities. The droplets were generated o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::deff0b2d16e43d6a70ada32030d3447e
https://elib.dlr.de/82311/

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