Hybrid methods for the prediction of the noise radiated by a Mach 0.5 ducted orifice flow

Jardon Z., KARBAN U., Christophe J., Schram C. F.

AIAA/CEAS Aeroacoustics Conference, 2018, Georgia, United States Of America, 25 - 29 June 2018, (Full Text) identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.2514/6.2018-3929
  • City: Georgia
  • Country: United States Of America
  • Middle East Technical University Affiliated: Yes

Abstract

The present work aims at comparing the predictions that are obtained, for the noise emitted by a ducted diaphragm, using a numerical acoustic simulation and an analytical Green’s function. In both cases the flow model is obtained by means of Scale-Adaptive Simulations and interpreted as equivalent sources along the lines of the aeroacoustic analogy. The flow regime is weakly compressible with a maximum Mach number about 0.5. This work constitutes the very first step of a wider study aimed at quantifying the numerical robustness and accuracy of hybrid methods for weakly compressible flows.