含导弹的内埋弹舱缩比模型空腔噪声试验研究

Experiment Research on Cavity Noise of Scale Model of Internal Weapon Bay Including Missiles

通过试验的方法研究了含弹的内埋弹舱缩比模型的空腔噪声。研究了不同的来流速度、前缘扰流板、后缘挡板等对含弹的内埋弹舱空腔噪声的影响。通过试验得出结论,来流速度影响空腔内的噪声分布,弹舱的纯音频率也会发生变化;带锯齿的前缘扰流板对弹舱内噪声不会起到抑制作用,反而会增大弹舱内噪声;后缘挡板倾斜角度越大,对弹舱内噪声的抑制效果越好。

The cavity noise of scale model of internal weapon bay including missiles were studied in the anechoic laboratory. The effect of weapon bay on cavity noise is researched,by different permanents through experiment,such as flow velocity,the leading edge spoiler,angle of the trailing edge. Conclusions could be drew as following：flow velocity can impact the distribution and frequency of the cavity noise. The leading edge of spoiler with saw tooth would not achieve the effect of noise suppression. With the increasing of the angle of the trailing edge,the cavity noise suppression effect is more obvious.