Hard wall - soft wall - vorticity scattering in shear flow

S.W. Rienstra, D.K. Singh

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

3 Citaten (Scopus)

Samenvatting

An analytically exact solution, for the problem of lowMach number incident vorticity scattering at a hard-soft wall transition, is obtained in the form of Fourier integrals by using theWiener-Hopf method. Harmonic vortical perturbations of inviscid linear shear flow are scattered at the wall transition. This results in a far field which is qualitatively different for low shear and high shear cases. In particular, for high shear the pressure (apparently driven by the mean flow) does not decay and its Fourier representation involves a diverging integral which is to be interpreted in generalised sense. Then the incompressible hydrodynamic (Wiener-Hopf) "inner" solution is matched asymptotically to an acoustic outer field in order to determine the sound associated to the scattering. The qualitative difference between low and high shear is also apparent here. The low shear case matches successfully. In the high shear case only a partial matching was possible.
Originele taal-2Engels
Titel20th AIAA/CEAS Aeroacoustics Conference (Atlanta GA, USA, June 16-20, 2014)
UitgeverijAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Aantal pagina's24
ISBN van geprinte versie978-162410285-1
DOI's
StatusGepubliceerd - 2014
Evenement20th AIAA/CEAS Aeroacoustics Conference - Atlanta, Verenigde Staten van Amerika
Duur: 16 jun 201420 jun 2014

Congres

Congres20th AIAA/CEAS Aeroacoustics Conference
LandVerenigde Staten van Amerika
StadAtlanta
Periode16/06/1420/06/14
Ander20th AIAA/CEAS Aeroacoustics Conference

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  • Citeer dit

    Rienstra, S. W., & Singh, D. K. (2014). Hard wall - soft wall - vorticity scattering in shear flow. In 20th AIAA/CEAS Aeroacoustics Conference (Atlanta GA, USA, June 16-20, 2014) [AIAA-2014-3350] American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2014-3350