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Sökning: WFRF:(Sinibaldi Giorgia)

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1.
  • Sinibaldi, Giorgia, et al. (författare)
  • Aeroacoustics and aerodynamics of impinging supersonic jets : Analysis of the screech tones
  • 2013
  • Ingår i: Physics of fluids. - : American Institute of Physics (AIP). - 1070-6631 .- 1089-7666. ; 25:8
  • Tidskriftsartikel (refereegranskat)abstract
    • The interaction between acoustics and aerodynamics of a supersonic jet is an actual fundamental topic which has been a matter of discussion in the last decades. The present paper is devoted to the experimental analysis of free and impinging jets with particular attention on the effect of an impinging surface on screech tones. The acoustics is studied using free-field microphones, while Particle Image Velocimetry is used to investigate the velocity field. The analysis of acquired data allowed to verify and explain the coupling between acoustic discrete tones and mean and fluctuating flow velocities.
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2.
  • Sinibaldi, Giorgia, et al. (författare)
  • Analysis of the Characteristic Acoustic Tones of an Impinging Jet
  • 2013
  • Ingår i: 19th AIAA/CEAS Aeroacoustics Conference. - Reston, Virginia : American Institute of Aeronautics and Astronautics. - 9781624102134
  • Konferensbidrag (refereegranskat)abstract
    • The acoustic emission of a supersonic jet is an interesting and fundamental issue due to the several technological applications and the diverse physical aspects to be still clarified. An experimental analysis of the characteristic acoustic tones of a supersonic impinging jet has been carried out with a particular attention on the effect of the nozzle pressure ratio and the distance of the impinging surface. The screech tones, typical of an imperfectly expanded supersonic free jet, have been first investigated to have an idea of the deflection from the free jet behavior due to the impinging surface. Then the analysis has been focused on smaller distances of the impinging plate from the jet exit to evaluate the behavior of the impinging tones. The difference between screech and impinging tones, due to the different interactions in the generating feedback mechanism, has been observed.
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  • Resultat 1-2 av 2
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konferensbidrag (1)
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refereegranskat (2)
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Romano, Giovanni Pao ... (2)
Sinibaldi, Giorgia (2)
Marino, Luca (2)
Lacagnina, Giovanni (1)
Lacagnina, Giovanni, ... (1)
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Engelska (2)
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2013 (2)

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