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Assessment of slat noise predictions for 30P30N high- lift configuration from Banc-III workshop
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2015 (English)In: 21st AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2015Conference paper (Refereed)Text
Abstract [en]

This paper presents a summary of the computational predictions and measurement data contributed to Category 7 of the 3rd AIAA Workshop on Benchmark Problems for Airframe Noise Computations (BANC-III), which was held in Atlanta, GA, on June 14-15, 2014. Category 7 represents the first slat-noise configuration to be investigated under the BANC series of workshops, namely, the 30P30N two-dimensional high-lift model (with a slat contour that was slightly modified to enable unsteady pressure measurements) at an angle of attack that is relevant to approach conditions. Originally developed for a CFD challenge workshop to assess computational fluid dynamics techniques for steady high-lift predictions, the 30P30N configurations has provided a valuable opportunity for the airframe noise community to collectively assess and advance the computational and experimental techniques for slat noise. The contributed solutions are compared with each other as well as with the initial measurements that became available just prior to the BANC-III Workshop. Specific features of a number of computational solutions on the finer grids compare reasonably well with the initial measurements from FSU and JAXA facilities and/or with each other. However, no single solution (or a subset of solutions) could be identified as clearly superior to the remaining solutions. Grid sensitivity studies presented by multiple BANC-III participants demonstrated a relatively consistent trend of reduced surface pressure fluctuations, higher levels of turbulent kinetic energy in the flow, and lower levels of both narrow band peaks and the broadband component of unsteady pressure spectra in the nearfield and farfield. The lessons learned from the BANC-III contributions have been used to identify improvements to the problem statement for future Category-7 investigations.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2015.
Keyword [en]
Acoustic noise, Aeroacoustics, Airframes, Angle of attack, Aviation, Computational fluid dynamics, Forecasting, Kinetic energy, Kinetics, Structural frames, Bench-mark problems, Computational fluid dynamics technique, Computational predictions, Computational solutions, Experimental techniques, Surface pressure fluctuations, Turbulent kinetic energy, Unsteady pressure measurements, Solution mining
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-187535ScopusID: 2-s2.0-84962505332ISBN: 9781624103674OAI: oai:DiVA.org:kth-187535DiVA: diva2:938001
Conference
21st AIAA/CEAS Aeroacoustics Conference, 2015, 22 June 2015 through 26 June 2015
Note

QC 20160616

Available from: 2016-06-16 Created: 2016-05-25 Last updated: 2016-06-16Bibliographically approved

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Vilela de Abreu, RodrigoHoffman, JohanJansson, Johan
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