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以计算流体力学软件FLUENT工具,二维增升装置模型L1T2为基准,采用LES模型和Ffcows Williams-Hall积分方法,计算二维增升装置前缘缝翼的远场噪声。通过计算24组不同缝道参数的二维增升装置的缝翼噪声和最大升力系数,分析了气动性能与噪声强度之间的关系,并采用建立响应面的方法对缝道参数进行了优化,使原增升装置模型的噪声强度得到了降低。结果表明:当缝道参数大小适中时噪声总声压级较小,反之噪声总声压级显著增大;当缝道宽度减小而重叠量增加时,噪声总声压级持续减小。适当的缝道参数组合是能够使所设计的增升装置较好地兼顾气动性能和噪声强度要求的。
Based on FLUENT computational fluid dynamics software and L1T2 model, the LES model and Ffcows Williams-Hall integral method were used to calculate the far-field noise of the two-dimensional lifting device. The relationship between aerodynamic performance and noise intensity was analyzed by calculating the slat noise and maximum lift coefficient of 24 sets of two-dimensional lifting devices with different parameters of slits. The parameters of the slits were optimized by establishing the response surface method. The original lifting device model noise intensity has been reduced. The results show that the total sound pressure level is small when the parameters of the seam size are moderate, while the total sound pressure level of the noise is significantly increased when the parameters of the seam size are moderate. The total sound pressure level of the noise decreases continuously when the width of the groove decreases and the overlap amount increases. The appropriate combination of seam parameters is able to make the design of the lifting device to better meet the aerodynamic performance and noise intensity requirements.