科研之友
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摘要
In this paper, a new method is presented to correct for the distortions in beamforming maps caused by wind tunnel shear layers during aeroacoustic testing. The shear layer correction method can be used for any convex shear layer shape including circles, ellipses, triangles, rectangles, octagons and squares. After deriving the methodology and proving its equivalence to one-dimensional methods, the shear layer correction method is used to correct the beamforming maps obtained experimentally from an airfoil placed in the potential core of a circular jet. The results show that the method can successfully remove the distorting effects of the shear layer on the airfoil trailing edge source distribution. Thus a new method is available to researchers to correct for the effects of shear layers in three-dimensions, which may also be extended to three-dimensional beamforming.
- 出版日期2018-1-15
