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The noise downstream of a cascade of loaded airfoils

Peake, N and Kerschen, EJ (2001) The noise downstream of a cascade of loaded airfoils. In: UNSPECIFIED.

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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. © 2001 by N. Peake and EJ. Kerschen.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 11 Dec 2018 01:37
Last Modified: 16 May 2019 02:19
DOI: