期刊
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
卷 62, 期 -, 页码 83-92出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ijheatfluidflow.2016.06.006
关键词
Acoustics; Airfoil; CFD; Immersed boundary; LES; Wave equation
资金
- Swedish Energy Agency
We investigate the noise generated by an airfoil section. Three cases are considered, one with a clean airfoil and two cases with airfoils with ice accretion. The amount of ice is the same in the two cases with ice accretion, but the surface of the accreted ice layer is smoother in one of them. The noise is computed using a hybrid approach. First the flow and the acoustic sources are computed. Second, the noise propagation is predicted by solving an inhomogeneous wave equation. The results indicate that in this case the accreted ice layer leads to a decrease of the radiated noise levels, especially in the lower frequency range. (C) 2016 Elsevier Inc. All rights reserved.
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