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- Nilsson, Stefan,1985Chalmers tekniska högskola,Chalmers University of Technology (author)
Effects of Aeroelastic Walls on the Aeroacoustics in Transonic Cavity Flow
- Article/chapterEnglish2022
Publisher, publication year, extent ...
- 2022-11-14
- MDPI AG,2022
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:research.chalmers.se:24cc96f7-0223-483b-9374-8ad582b0b526
- https://research.chalmers.se/publication/533027URI
- https://doi.org/10.3390/aerospace9110716DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- The effects of elastic cavity walls on noise generation at transonic speed are investigated for the generic M219 cavity. The flow is simulated with the Spalart–Allmaras (SA) improved delayed detached-eddy simulation (IDDES) turbulence model in combination with a wall function. The structural analysis software uses a modal formulation. The first 50 structural normal mode shapes are included in the simulation, spanning frequencies of 468–2280 Hz. Results are compared with those from a reference simulation with rigid cavity walls. A spectral analysis of pressure fluctuations from a microphone array above the cavity evinces a distinct tone at 816 Hz, which is absent in the reference simulation. Furthermore, the power of the 4th Rossiter mode at 852 Hz is depleted, implying a significant energy transfer from the fluid to the structure. Spectral proper orthogonal decomposition (SPOD) is employed for analyses of cavity wall pressure fluctuations and wall displacements. The SPOD mode energy spectra show results consistent with the spectra of the microphone array with respect to the tone at 816 Hz and the depletion of the energy at the 4th Rossiter mode. Furthermore, the SPOD mode energy spectra show energy spikes at additional frequencies, which coincide with structural eigenfrequencies.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Maskinteknik Teknisk mekanik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Applied Mechanics hsv//eng
- NATURVETENSKAP Fysik Annan fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Other Physics Topics hsv//eng
- TEKNIK OCH TEKNOLOGIER Maskinteknik Strömningsmekanik och akustik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Fluid Mechanics and Acoustics hsv//eng
- FSI
- aeroacoustics
- aeroelasticity
- cavity flow
- hybrid RANS-LES
Added entries (persons, corporate bodies, meetings, titles ...)
- Yao, Huadong,1982Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)huadong (author)
- Karlsson, Anders (author)
- Arvidson, Sebastian,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)arviseba (author)
- Chalmers tekniska högskola (creator_code:org_t)
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- In:Aerospace: MDPI AG9:112226-4310
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