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논문 기본 정보

자료유형
학술저널
저자정보
Seung Tae Hwang (Korea University) Chang Kyun Han (Korea University) Yong Taek Im (Korea University) Jong Rok Kim (Korea University) Youngmin Bae (Korea University) Young J. Moon (Korea University)
저널정보
한국항공우주학회 International Journal of Aeronautical and Space Sciences International Journal of Aeronautical and Space Sciences Volume.18 Number.2
발행연도
2017.6
수록면
197 - 205 (9page)
DOI
10.5139/IJASS.2017.18.2.197

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초록· 키워드

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We investigate the slat noise generation mechanism by using large-eddy simulation (LES) and simple source modeling based on linearized Euler equations. An incompressible LES of an MD 30P30N three-element airfoil in the high-lift configuration is conducted at Rec = 1.7×10⁶. Using the total derivative of the hydrodynamic pressure (DP/Dt) acquired from the incompressible LES, representative noise sources in the slat cove region are characterized in terms of simple sources such as frequency-specific monopoles and dipoles. Acoustic radiation around the 30P30N multi-element airfoil is effectively computed using the Brinkman penalization method incorporated with the linearized Euler equation. The directivity pattern of p’<SUB>rms</SUB> at r = 20c<SUB>slat</SUB> in the multiple sources is closely compared to that obtained by the application of the LES/Ffowcs-Williams and Hawking’s methods to the entire flow field. The power spectrum of p’ at θ = 290° is in good agreement with the data reported in BANC-III, especially the broadband part of the spectrum with a decaying slope ∝ f <SUP>-3</SUP>.

목차

Abstract
1. Introduction
2. Large Eddy Simulation of MD 30P30N Multi-Element Airfoil
3. 3Slat Noise Modeling with simple Sources
4. Conclusions
References

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