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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Dang-guo Yang Jian-qiang Li Wei-min Jiang |
| Copyright Year | 2009 |
| Description | Author affiliation: China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, China (Dang-guo Yang; Jian-qiang Li; Wei-min Jiang) |
| Abstract | This paper presents flow-sustained oscillations and aeroacoustic characteristics within open rectangular cavities with length to depth ratios of 6 and 8 by analyzing flow-field structures and fluctuating pressure measurement inside the cavities in a wind-tunnel test. The free-stream Mach numbers were 0.8 and 1.5. The results indicate that a vortex inside the cavities vents the high pressures ahead of the rear face and the low pressures downstream of the front face, which has little influence on the sound-wave feedback mechanism from the cavity rear face to the cavity front face. Therefore, the self-sustained flow oscillations and some peak frequencies occur inside the open cavity. The simulated flow self-sustained oscillation frequencies inside the open cavities with length to depth ratio of 8 agree with Rossiter's and Heller's predicated results, which indicate their frequency characteristics. The results present that intensive noise exists inside open cavities. |
| Starting Page | 35 |
| Ending Page | 35 |
| File Size | 846597 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781424449507 |
| DOI | 10.1109/SPAWDA.2009.5428967 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-12-17 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Aerodynamics aeroacoustic characteristics SPFS Research and development flow-sustained oscillations SPL Acoustic noise Vents Feedback oscillation frequencies Digital signal processing Open cavity Frequency Pressure measurement Testing |
| Content Type | Text |
| Resource Type | Article |
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