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A model of wall pressure correlation for prediction of turbulence-induced vibration
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet.ORCID-id: 0000-0002-9031-3662
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet.ORCID-id: 0000-0002-1143-4643
2005 (Engelska)Ingår i: Journal of Fluids and Structures, ISSN 0889-9746, E-ISSN 1095-8622, Vol. 20, nr 8, s. 1127-1143Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The vibration response of a structure excited by a turbulent boundary layer is investigated experimentally and numerically. First, the wall pressure in a high speed acoustic wind tunnel is characterized and the cross-spectral density is approximated using a Corcos model with frequency dependent correlation lengths and a modified Chase model. Both models agree quite well with the measured cross spectrum. Second, based on these turbulence models, the vibration response is predicted and compared to measurements. At lower frequencies both models perform well. In a higher frequency region, however, the vibration response is greatest for length scales that are much longer than the one given by the convection velocity of the turbulence, and in this frequency region only the modified Chase model works effectively.

Ort, förlag, år, upplaga, sidor
2005. Vol. 20, nr 8, s. 1127-1143
Nyckelord [en]
turbulence, wall pressure, correlation, chase, random vibration, finite-element-method, boundary-layer pressures, spectral super element, frequency spectrum, plate vibration, general-theory, part 1, fluctuations, field, beneath
Nationell ämneskategori
Strömningsmekanik och akustik
Identifikatorer
URN: urn:nbn:se:kth:diva-15026DOI: 10.1016/j.jfluidstructs.2005.05.012ISI: 000231741100008Scopus ID: 2-s2.0-23844518955OAI: oai:DiVA.org:kth-15026DiVA, id: diva2:333067
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QC 20100525

Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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