Abstract
An analytical model of the sound power radiated from a at plate airfoil of in nite span in a 2D turbulent ow is presented. The e ects of stagger angle on the radiated sound power are included so that the sound power radiated upstream and downstream of the fan axis can be predicted, for application to the broadband noise due to turbomachinery. Closed-form asymptotic expressions, valid at low and high frequencies, are derived for the upstream, downstream and total sound power. A study of the e ects of chord length on the total sound power at all reduced frequencies is presented. The single-airfoil model presented in this paper is compared to an equivalent cascade model in a companion paper.
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