【摘要】：針對(duì)某型飛機(jī)前起落架1/6縮比模型及起落架支柱在聲學(xué)風(fēng)洞中進(jìn)行了氣動(dòng)噪聲試驗(yàn)研究。試驗(yàn)結(jié)果表明:起落架與起落架支柱噪聲具有寬頻噪聲特性;噪聲源主要是偶極子和單極子聲源,遠(yuǎn)場(chǎng)噪聲具有一定的偶極子指向性;噪聲頻譜出現(xiàn)明顯的峰值噪聲,其頻率隨流速的增大而增加,這是減振支柱與防扭臂的干涉噪聲;噪聲頻率與起落架結(jié)構(gòu)的特征尺寸長(zhǎng)度相關(guān),尺寸較大的結(jié)構(gòu)引起中低頻噪聲,尺寸較小的結(jié)構(gòu)引起高頻噪聲。
[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.
【作者單位】： 中國(guó)飛機(jī)強(qiáng)度研究所;西北工業(yè)大學(xué);
【基金】：航空科學(xué)基金(20121223006)資助
【分類號(hào)】：V226;V216

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