2010, ISBN: 9783832289768

[ED: Taschenbuch], [PU: Shaker], Noise generated by high-lift devices is an essential part of the emitted sound of an airplane especially during approach when the engines run almost in id… Altro …

[ED: Taschenbuch], [PU: Shaker], Noise generated by high-lift devices is an essential part of the emitted sound of an airplane especially during approach when the engines run almost in idle conditions. The sound spectra are characterized by a mix of tonal and broadband components which are originated by the turbulent flow field, i.e., the noise generation is dominated by vortex-vortex and vortexwall interaction. Therefore, in the present study the turbulent flow field over a slat-main wing configuration is investigated by a large-eddy simulation (LES) and subsequently, the obtained unsteady flow data is used to analyze the acoustic field based on the acoustic perturbation equations (APE). The computations are performed at a freestream MACH number of Ma=0.16 at an angle of attack of 13 deg. The REYNOLDS number which is based on the clean chord length and the freestream velocity is Re= 1.4x10 6 . It is shown that a pure LES is not suitable for industrial applications when high REYNOLDS numbers are considered due to the vast required computational effort. Therefore, in the present work a zonal method is developed and implemented which combines the Ravsorns-averaged NAVIER-STOKES (RANS) equations and the spatially filtered NAVIER-STOKES equations solved in a large-eddy simulation, i.e., in regions where unsteady turbulent flow data is required an LES is performed whereas the remaining flow field regions are computed by a RANS simulation which is in terms of computational effort more efficient than an LES. First, the zonal RANS/LES method is validated by turbulent channel flow simulations and, second, it is applied to the slat-main wing configuration., DE, [SC: 0.00], Neuware, gewerbliches Angebot, 123, [GW: 181g], Sofortüberweisung, PayPal, Banküberweisung<

2010, ISBN: 3832289763

[EAN: 9783832289768], Neubuch, [SC: 0.0], [PU: Shaker Verlag Mrz 2010], Neuware - Noise generated by high-lift devices is an essential part of the emitted sound of an airplane especially … Altro …

[EAN: 9783832289768], Neubuch, [SC: 0.0], [PU: Shaker Verlag Mrz 2010], Neuware - Noise generated by high-lift devices is an essential part of the emitted sound of an airplane especially during approach when the engines run almost in idle conditions. The sound spectra are characterized by a mix of tonal and broadband components which are originated by the turbulent flow field, i.e., the noise generation is dominated by vortex-vortex and vortexwall interaction. Therefore, in the present study the turbulent flow field over a slat-main wing configuration is investigated by a large-eddy simulation (LES) and subsequently, the obtained unsteady flow data is used to analyze the acoustic field based on the acoustic perturbation equations (APE). The computations are performed at a freestream MACH number of Ma=0.16 at an angle of attack of 13 deg. The REYNOLDS number which is based on the clean chord length and the freestream velocity is Re= 1.4x10 6 . It is shown that a pure LES is not suitable for industrial applications when high REYNOLDS numbers are considered due to the vast required computational effort. Therefore, in the present work a zonal method is developed and implemented which combines the Ravsorns-averaged NAVIER-STOKES (RANS) equations and the spatially filtered NAVIER-STOKES equations solved in a large-eddy simulation, i.e., in regions where unsteady turbulent flow data is required an LES is performed whereas the remaining flow field regions are computed by a RANS simulation which is in terms of computational effort more efficient than an LES. First, the zonal RANS/LES method is validated by turbulent channel flow simulations and, second, it is applied to the slat-main wing configuration. 123 pp. Englisch<

2010, ISBN: 9783832289768

Erscheinungsdatum: 03/2010, Medium: Taschenbuch, Einband: Kartoniert / Broschiert, Titel: Local Large-Eddy Simulation of a Slat-Wing Configuration, Autor: König, Daniel, Verlag: Shaker Ve… Altro …

Erscheinungsdatum: 03/2010, Medium: Taschenbuch, Einband: Kartoniert / Broschiert, Titel: Local Large-Eddy Simulation of a Slat-Wing Configuration, Autor: König, Daniel, Verlag: Shaker Verlag // Shaker, Sprache: Englisch, Rubrik: Wärme- // Energie-, Kraftwerktechnik, Seiten: 123, Abbildungen: 21 farbige Abbildungen, Gewicht: 181 gr, Verkäufer: averdo Fachbücher & Lernen, [PU: Shaker Verlag, Aachen]<

2010, ISBN: 9783832289768

Letzte Aktualisierung am: 21.01.19 08:51:46 Binding: Taschenbuch, Edition: 1, Label: Shaker, Publisher: Shaker, medium: Taschenbuch, numberOfPages: 123, publicationDate: 2010-03-01, autho… Altro …

Letzte Aktualisierung am: 21.01.19 08:51:46 Binding: Taschenbuch, Edition: 1, Label: Shaker, Publisher: Shaker, medium: Taschenbuch, numberOfPages: 123, publicationDate: 2010-03-01, authors: Daniel König, languages: english, ISBN: 3832289763 Bücher, - Daniel König -<

2010, ISBN: 9783832289768

[ED: 1], 1., Aufl., Buch, Buch, [PU: Shaker]