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Hu, Nan and Herr, Michaela (2016) Characteristics of wall pressure fluctuations for a flat plate turbulent boundary layer with pressure gradients. 22nd AIAA/CEAS Aeroacoustics Conference, 30.5.-1.6.2016, Lyon, France.
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Abstract
The wall pressure fluctuations beneath a turbulent boundary layer with zero and non-zero pressure gradients were measured at a flat plate configuration in the Acoustic Windtunnel Braunschweig. The fluctuating pressure was measured by an array of subminiature pressure transducers. In addition, the mean flow velocity profiles within the turbulent boundary layer were obtained using hot wires. Adverse and favorable pressure gradients were realized by placing a rotatable NACA 0012 airfoil with a chord length of 40 cm above the flat plate. The one-point spectra and the two-point correlation properties are analysed. An empirical spectral model for the wall pressure fluctuations beneath an adverse pressure gradient boundary layer is developed based on the measured data. The effects of the pressure gradients on the characteristics of the wall pressure fluctuations are discussed.
| Item URL in elib: | https://elib.dlr.de/109083/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech) | |||||||||
| Title: | Characteristics of wall pressure fluctuations for a flat plate turbulent boundary layer with pressure gradients | |||||||||
| Authors: |
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| Date: | 2016 | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | Yes | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| Status: | Published | |||||||||
| Keywords: | Aeroacoustics, Wall pressure fluctuations | |||||||||
| Event Title: | 22nd AIAA/CEAS Aeroacoustics Conference | |||||||||
| Event Location: | Lyon, France | |||||||||
| Event Type: | international Conference | |||||||||
| Event Dates: | 30.5.-1.6.2016 | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | fixed-wing aircraft | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L AR - Aircraft Research | |||||||||
| DLR - Research theme (Project): | L - Systems and Cabin (old) | |||||||||
| Location: | Braunschweig | |||||||||
| Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Technical Acoustics | |||||||||
| Deposited By: | Hu, Nan | |||||||||
| Deposited On: | 06 Dec 2016 14:55 | |||||||||
| Last Modified: | 31 Jul 2019 20:06 |
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