Elucidation of fan noises using high-precision numerical prediction and multiple acoustic mode control experiments of fan noises
| Project/Area Number |
23560955
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Aerospace engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
YAMASAKI Nobuhiko 九州大学, 工学(系)研究科(研究院), 教授 (70166635)
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| Co-Investigator(Kenkyū-buntansha) |
INOKUCHI Yuzo 九州大学, 大学院工学研究院, 准助教 (30274509)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | ファン騒音 / トーンノイズ / 能動制御 / ANC / モード解析 / 線形非定常 / 翼列 / 騒音制御 / 数値シミュレーション |
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| Research Abstract |
Effects of the lean (circumferential inclination angle), the distance from the rotor blades, the sweep (axial inclination angle) of the stator vanes downstream of the rotor blade of a fan on fan noise reduction were elucidated by the numerical calculation based on the unsteady Reynolds-averaged Navier-Stokes (URANS) equations. It was shown all geometric parameters can be effective in the noise reduction, together with the physical reasoning.
As far as the active suppression of fan noise using the model fan setup is concerned, the sound source which can generate multiple sound modes was developed, the filtered-x LMS algorithm in the frequency domain was introduced, and the automatic control of the multiple modes was enabled to be realized.
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Report
(4 results)
Research Products
(23 results)
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[Presentation] Experiments on Adaptive Anti-Noise Control for Fan Noises2012
Author(s)
Yutaro Suzuki, Kenichiro Nagai, Yuzo Inokuchi, Takuya Ishii, Hideshi Oinuma, and Nobuhiko Yamasaki
Organizer
Proceedings of The 13^<th> International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines
Place of Presentation
(ISUAAAT13-S12-6, CD-ROM)
Related Report
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