The noise downstream of a cascade of loaded airfoils

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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)
Title of host publication7th AIAA/CEAS Aeroacoustics Conference and Exhibit
StatePublished - 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

Fingerprint

Cascades (fluid mechanics)
airfoils
Unsteady flow
blades
Airfoils
cascades
Acoustics
Radiation
gusts
unsteady flow
flat plates
radiation distribution
upstream
inclination
expansion
acoustics
interactions

ASJC Scopus subject areas

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

Cite this

Peake, N., & Kerschen, E. J. (2001). The noise downstream of a cascade of loaded airfoils. In 7th AIAA/CEAS Aeroacoustics Conference and Exhibit

The noise downstream of a cascade of loaded airfoils. / Peake, N.; Kerschen, Edward J.

7th AIAA/CEAS Aeroacoustics Conference and Exhibit. 2001.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Peake, N & Kerschen, EJ 2001, The noise downstream of a cascade of loaded airfoils. in 7th AIAA/CEAS Aeroacoustics Conference and Exhibit. 7th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2001, Maastricht, Netherlands, 5/28/01.
Peake N, Kerschen EJ. The noise downstream of a cascade of loaded airfoils. In 7th AIAA/CEAS Aeroacoustics Conference and Exhibit. 2001
Peake, N. ; Kerschen, Edward J. / The noise downstream of a cascade of loaded airfoils. 7th AIAA/CEAS Aeroacoustics Conference and Exhibit. 2001.
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