The noise downstream of a cascade of loaded airfoils

N. Peake, E. J. Kerschen

Research output: Contribution to conferencePaperpeer-review

Abstract

In this paper we consider the interaction between vortical gusts of reduced frequency k and a cascade of flat-plate blades at an angle of inclination δ to the oncoming subsonic mean flow. In the asymptotic limit A: » 1 with kδ = 0(1) it turns out that the unsteady flow can be described using matched asymptotic expansions, and in earlier papers we have described how to use this method to determine the radiation field upstream of the cascade and in the blade passages. In this paper we turn our attention to the field downstream of the cascade, and describe the theoretical framework and principal analytical expressions. A particular feature will be potential strong acoustic beaming in directions matching with the modal directions in the blade passages.

Original languageEnglish (US)
StatePublished - Dec 1 2001
Event7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001 - Maastricht, Netherlands
Duration: May 28 2001May 30 2001

Other

Other7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001
CountryNetherlands
CityMaastricht
Period5/28/015/30/01

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Acoustics and Ultrasonics

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