本人看过一个算例就是计算管道风扇分析的算例,他计算了其噪声,计算的管道空间的噪声,但是本人又看见了fluent的帮助中写到“One important limitation of FLUENT's FW-H model is that it is applicable only to predicting the propagation of sound toward free space. Thus, while the model can be legitimately used to predict far field noise due to external aerodynamicows, such as
the flows around ground vehicles and aircrafts, it cannot be used for predicting the noise propagation inside ducts or wall-enclosed space.”请问一下这里fw-h模型到底可以用到什么样的模型中去,而这个free space到底是指什么样的空间?急求!!