Enghardt, L. and Fischer, A. and Schulz, A. and Busse-Gerstengarbe, St. (2012) Determination of the impedance for lined ducts with grazing flow. In: Proceedings 18th AIAA / CEAS Aeroacoustics Conference (33rd Aeroacoustics Conference), Vol. 1 of 5. 18th AIAA/CEA Aeroacoustics Conference, 2012-06-04 - 2012-06-06, Colorado Springs, USA. doi: 10.2514/6.2012-2243. ISBN 978-1-62276-215-6.
Full text not available from this repository.
Abstract
Passive means of acoustically damping devices like perforates or - more generally - liners play an important role in industrial applications to protect the community e.g against power plant noise´. In aero-engines, Helmholtz resonator type liners serve as substantial noise abatement means in regions of cold flow. An important physical property to characterize lining devices is the impedance. Several impedance eduction methods exist in literature, most of which are mathematically complicated or need substantial computation time. This paper presents a new impedance eduction method, which is relatively simple to apply, robust, and cheap in terms of computational effort. The method is derived and validated with NASA benchmark data. Its accuracy and applicability is demonstrated and approved.
Item URL in elib: | https://elib.dlr.de/77525/ | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
Title: | Determination of the impedance for lined ducts with grazing flow | ||||||||||||||||||||
Authors: |
| ||||||||||||||||||||
Date: | 2012 | ||||||||||||||||||||
Journal or Publication Title: | Proceedings 18th AIAA / CEAS Aeroacoustics Conference (33rd Aeroacoustics Conference) | ||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||
Volume: | Vol. 1 of 5 | ||||||||||||||||||||
DOI: | 10.2514/6.2012-2243 | ||||||||||||||||||||
ISBN: | 978-1-62276-215-6 | ||||||||||||||||||||
Status: | Published | ||||||||||||||||||||
Keywords: | Liner, Semi-analytical, APIV, LINUS, PIANO, CAA | ||||||||||||||||||||
Event Title: | 18th AIAA/CEA Aeroacoustics Conference | ||||||||||||||||||||
Event Location: | Colorado Springs, USA | ||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||
Event Start Date: | 4 June 2012 | ||||||||||||||||||||
Event End Date: | 6 June 2012 | ||||||||||||||||||||
Organizer: | AIAA | ||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||||
HGF - Program Themes: | Propulsion Systems (old) | ||||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||||
DLR - Program: | L ER - Engine Research | ||||||||||||||||||||
DLR - Research theme (Project): | L - Turbine Technologies (old) | ||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||
Institutes and Institutions: | Institute of Propulsion Technology > Engine Acoustic | ||||||||||||||||||||
Deposited By: | Kaur, Balbir | ||||||||||||||||||||
Deposited On: | 10 Jan 2013 10:57 | ||||||||||||||||||||
Last Modified: | 24 Apr 2024 19:43 |
Repository Staff Only: item control page