다중 투과면을 이용한 UH-1H 로터 블레이드의 제자리 비행 시 원방 소음 해석 연구 Aero-Acoustic Analysis in Far-Field using Multi-Permeable Surfaces for UH-1H Rotor Blade In Hovering Flight

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In this study, aero-acoustics in far-field is computed for the UH-1H rotor blade in hovering flight. A Chimera grid method is applied in this simulation to consider the blade motion and moving effects. Multi-permeable surfaces surrounding a blade are constructed to include the flow noise generated from the shock wave and the tip vortices. A computation is performed with three-dimensional Euler’s equations. An acoustic analogy code using the Kirchhoff approach to Ffowcs Williams and Hawkings equations is applied to efficient the noise prediction caused by volume noise sources in far-field. The high speed impulsive noise on the rotor blade is predicted and validated according to the permeable surface locations. It is confirmed that the noise source caused by the shock waves generated on the blade surface is a dominant factor in the far-field noise prediction.
Publisher
한국전산유체공학회
Issue Date
2017-09
Language
Japanese
Keywords

전산유체역학(CFD); 중첩격자(Chimera grid); 다중 투과면(Multi-Permeable Surface); 공력-소음 해석(Aerodynamic and Aero-acoustic analysis); 음향상사법(Acoustic analogy); HSI 소음(High Speed Impulsive Noise)

Citation

한국전산유체공학회지, v.22, no.3, pp.102 - 108

ISSN
1598-6071
DOI
10.6112/kscfe.2017.22.3.102
URI
http://hdl.handle.net/10203/241136
Appears in Collection
AE-Journal Papers(저널논문)
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