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Time-domain computation of broadband noise due to interaction of a rectilinear cascade of flat plates with inflow turbulence
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kim, Daehawn Cheong, Cheolung |
| Copyright Year | 2010 |
| Abstract | In this paper, time-domain computational aeroacoustic (CAA) methods are developed to predict broadband noise generation and propagation by a rectilinear cascade of flat plates interacting with ingesting turbulent gust. Utilizing three-dimensional time-domain CAA model, the three-dimensional characteristics of inflow turbulence noise due to the turbulence-cascade interaction are investigated with an emphasis placed on the effects of wavenumber components of ingesting turbulence in the span-wise direction. Through the comparison of three-dimensional results with two-dimensional ones, the characteristics of sound pressure spectrums obtained from the three-dimensional results are revealed, which is mainly due to the different dispersion relations of acoustic waves in two- and three-dimensions. These differences between two- and three-dimensional results become more significant in the lower frequency components. In addition, some preliminary numerical results on the effects on the broadband noise of a rectilinear cascade of leaned or swept flat plates are illustrated, which can provide basic principle for the low-noise design of the stator in turbo-fan engines. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.acoustics.asn.au/conference_proceedings/ICA2010/cdrom-ICA2010/papers/p715.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
