采用流场三维数值模拟结果，得到叶片边界层数据，再用尾流脱落模型进行低压轴流风机的噪声预估；
The information of boundary layer of a blade is obtained from a 3-D numerical simulation for flow field in an axial fan . Then the noise of a low-pressure axial fan can be predicted using a wake-flow shedding model .
尾流低压