Multi-modal noise generation in low Mach number orifice plates: an experimental investigation - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Multi-modal noise generation in low Mach number orifice plates: an experimental investigation

Islam Ramadan
Simon Rampnoux
  • Fonction : Auteur
  • PersonId : 1184938
Stefano Malavasi
E. Perrey-Debain

Résumé

Abstract. An experimental campaign on aerodynamic noise generation by orifice plates in rectangular ducts for low Mach number flows is carried. The test plant allows for the measurement of the total emitted acoustic power both upstream and downstream of the orifice plates for varying mass flow rates through the 2N-Port method. A modal decomposition for the first eight propagating higher-order acoustic modes is also performed. Keeping the free flow area and the plates’ thickness constant, the tests allowed for a study of the influence of the number of circular orifices on the generated acoustic power as well as its modal composition. It is found that the orifices’ number does not influence the overall pressure drop caused by the presence of the obstacle. The generated noise on the contrary is greatly affected by such a parameter both for the plane-wave frequency range and especially so in the multi-modal one.

Dates et versions

hal-04277082 , version 1 (09-11-2023)

Identifiants

Citer

Luca Nicola Quaroni, Islam Ramadan, Simon Rampnoux, Stefano Malavasi, E. Perrey-Debain. Multi-modal noise generation in low Mach number orifice plates: an experimental investigation. AIMETA 2022, Sep 2022, Palermo, Italy. pp.699-704, ⟨10.21741/9781644902431-112⟩. ⟨hal-04277082⟩
7 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More