Loupy, G.J.M., Barakos, G.N. and Kusyumov, A. (2017) Acoustic field around a transonic cavity flow. International Journal of Aeroacoustics, 16(6), pp. 507-535. (doi: 10.1177/1475472X17730459)
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144679.pdf - Accepted Version 4MB |
Abstract
This paper describes new techniques for analysing cavity flows. The beamforming method is used to estimate the pressure fluctuations inside a resonant transonic cavity, highlighting the localisation of the sources of noise. The method produces insightful results and only requires the use of an acoustic array and a mean flow-field. The technique models the noise propagation in a simple and efficient way, applicable for wind tunnel test. In addition, this paper discusses the generation of the cavity tones. Computational fluid dynamics results are analysed using a superposition of reflected acoustic waves driven by the cavity flow. This analysis shows that the time-averaged flow-field drives the frequencies of the tones, while the flow-field fluctuations drive their amplitude. In addition, the tonal dynamics of the cavity flow are represented by a simple model with standing wave oscillations and their modulation. This work is complementary to the well-established Rossiter cavity model.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Barakos, Professor George and Loupy, Gaëtan |
| Authors: | Loupy, G.J.M., Barakos, G.N., and Kusyumov, A. |
| College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
| Journal Name: | International Journal of Aeroacoustics |
| Publisher: | SAGE |
| ISSN: | 1475-472X |
| ISSN (Online): | 2048-4003 |
| Published Online: | 21 September 2017 |
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