發(fā)布時(shí)間：2018-12-08 08:08

【摘要】：采用LES方法結(jié)合FW-H聲學(xué)模型計(jì)算分析了螺旋槳的近場(chǎng)脈動(dòng)壓力和遠(yuǎn)場(chǎng)聲輻射特性。近場(chǎng)脈動(dòng)壓力分析結(jié)果表明:脈動(dòng)壓力頻譜特性在槳盤面和槳軸方向存在差異,脈動(dòng)壓力幅值隨著距離增大迅速衰減;若要得到螺旋槳遠(yuǎn)場(chǎng)輻射噪聲,聲壓接收點(diǎn)的位置需至少距離螺旋槳10倍直徑。遠(yuǎn)場(chǎng)噪聲指向性分析結(jié)果發(fā)現(xiàn):聲壓總級(jí)在槳軸縱向平面呈現(xiàn)橢圓形分布,軸向總聲級(jí)比盤面周向大。此外,噪聲頻譜特性的分析結(jié)果發(fā)現(xiàn),槳盤面和槳軸方向聲輻射頻率特性也存在差異。
[Abstract]:The near field pulsating pressure and far field acoustic radiation characteristics of propeller are calculated and analyzed by LES method and FW-H acoustic model. The results of near field pulsating pressure analysis show that the spectral characteristics of pulsating pressure are different in the direction of propeller disk and shaft, and the amplitude of pulsating pressure decreases rapidly with the increase of distance. In order to obtain the far field radiated noise of the propeller, the position of the receiving point of sound pressure should be at least 10 times the diameter of the propeller. The results of far field noise directivity analysis show that the total sound pressure level is elliptical in the longitudinal plane of the propeller shaft, and the axial total sound level is larger than the circumferential direction of the disc surface. In addition, the results of noise spectrum analysis show that there are also differences in the frequency characteristics of acoustic radiation between propeller disk and propeller axis.
【作者單位】： 武漢第二船舶設(shè)計(jì)研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51409199)
【分類號(hào)】：U664.33

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