含弹内埋弹舱缩尺模型气动噪声特性研究

Characteristics of Aerodynamic Noise in Scale Model of Weapon Bay

目的对含弹的内埋弹舱模型进行噪声仿真和试验研究。方法计算采用"CFD+CAA"的混合方法,采用DDES计算流场,基于M?hring声学类比方法得到测量点的噪声信息。采用该方法与空腔M219标准试验结果进行对比。内埋弹舱吹风试验在全消声室中进行,并采用传声器阵列识别主要噪声源。结果计算与试验得到的不同来流条件下,不同测量点的噪声频谱曲线基本一致。弹舱内最大声压级出现在中间弹翼附近的侧壁上,与声源识别的主要噪声源的位置一致。结论该研究可为内埋弹舱的设计提供参考和技术支持。

Objective To perform simulation analysis and experiment research on noise of a weapon bay.Methods“CFD+CAA”as well as DDES were used to calculate the flow field.Then based on the M?hring acoustics analogy method,information on noise at the measuring spot was obtained.This method was compared with the result of cavity M219 standard test.The blowing test of the weapon bay was carried out in a full anechoic chamber and main noise sources were identified with a microphone array.Results The curves of noise spectrum in different measuring spots are basically in line with each other under different flowing conditions obtained in computation and experiment.The maximum sound pressure level of the weapon bay appeared at the side wall around middle missile wing,this is in line with the position of the main noise source of sound source identification.Conclusion The study can provide reference and technical support for design of weapon bay.