한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2012년도 추계학술대회 논문집
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- Pages.71-74
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- 2012
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- 1598-2548(pISSN)
탭이 있는 로터 블레이드의 공력소음에 대한 수치적 연구
Numerical Investigation of Aerodynamic Noise about Rotor Blade with Tab
- 발행 : 2012.10.27
초록
Generally, tone noise is generated at the rotary wing and helicopter. BVI(Blade-Vortex Interaction) noise is one of the helicopter's tone noise. The BVI noise is governed by tip-vortex characteristics such as vortex size, strength and trajectory. To avoid BVI, many methods have been developed and proposed. In this paper, rotating blade with active tab was numerically investigated to reduce BVI noise. For flow and noise simulation, the lifting surface approach and the acoustic analogy were used. Using numerical methods, the noise directivity and maximum noise position were predicted.