《表3 串联机翼构型的外形参数》

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《几何外形变化对串联翼型干扰噪声的影响（英文）》

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The turbulence flow is mainly developed at the upper face and trailing edge of the front airfoil，then the upper face of the rear airfoil.These areas are likely to be the primary regions for noise sources.The SPL（sound pressure levels）spectra are shown in Figure 11.Three FW-H integration surfaces comprised of the front airfoil and aft airfoil，and tandem airfoil were used to obtained the far-field results of the three lines，respectively.It can be seen that aft airfoil is the dominant noise source in the overall model.The maximum SPL frequency of aft airfoil in the tandem configuration is totally different from the isolated condition，which has a max SPL frequency of about 2700 Hz[21].This is similar to the rod airfoil configuration.Therefore，the following work in this paper focused on the trailing edge of the front airfoil and the leading edge of aft airfoil.