飞机起落架气动噪声试验
发布时间：2019-02-12 17:35
【摘要】：针对某型飞机前起落架1/6缩比模型及起落架支柱在声学风洞中进行了气动噪声试验研究。试验结果表明:起落架与起落架支柱噪声具有宽频噪声特性;噪声源主要是偶极子和单极子声源,远场噪声具有一定的偶极子指向性;噪声频谱出现明显的峰值噪声,其频率随流速的增大而增加,这是减振支柱与防扭臂的干涉噪声;噪声频率与起落架结构的特征尺寸长度相关,尺寸较大的结构引起中低频噪声,尺寸较小的结构引起高频噪声。
[Abstract]:Based on the 1 / 6 scale model of the front landing gear of a certain aircraft, the aerodynamic noise test of the landing gear support in the acoustic wind tunnel was carried out. The experimental results show that the noise of landing gear and landing gear has the characteristics of wide-band noise, the noise source is mainly dipole and monopole sound source, and the far-field noise has certain dipole directivity. There is obvious peak noise in the noise spectrum, and the frequency increases with the increase of the velocity, which is the interference noise between the vibration absorber and the anti-torsion arm. The noise frequency is related to the length of the characteristic size of the landing gear structure. The larger structure causes the middle and low frequency noise, and the smaller structure causes the high frequency noise.
【作者单位】： 中国飞机强度研究所;西北工业大学;
【基金】：航空科学基金(20121223006)资助
【分类号】：V226;V216
本文编号：2420635
[Abstract]:Based on the 1 / 6 scale model of the front landing gear of a certain aircraft, the aerodynamic noise test of the landing gear support in the acoustic wind tunnel was carried out. The experimental results show that the noise of landing gear and landing gear has the characteristics of wide-band noise, the noise source is mainly dipole and monopole sound source, and the far-field noise has certain dipole directivity. There is obvious peak noise in the noise spectrum, and the frequency increases with the increase of the velocity, which is the interference noise between the vibration absorber and the anti-torsion arm. The noise frequency is related to the length of the characteristic size of the landing gear structure. The larger structure causes the middle and low frequency noise, and the smaller structure causes the high frequency noise.
【作者单位】： 中国飞机强度研究所;西北工业大学;
【基金】：航空科学基金(20121223006)资助
【分类号】：V226;V216
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