摘要
对基于气动声学基础理论的涡桨飞机气动噪声预估方法进行了研究,发展了一种增升装置、起落架等机体部件噪声模型,建立了考虑机翼诱导干扰的螺旋桨噪声源模型,并结合等效噪声源法(equivalent source method,ESM)考虑机体对螺旋桨噪声的散射,形成涡桨飞机气动噪声预估程序。采用某型涡桨飞机的噪声飞行试验数据进行了对比验证,预估结果相对于飞行结果在适航噪声测量点处的误差不超过2 dB,表明了该噪声计算程序具备较高的预测精准度。
The prediction method of turboprop aircraft noise based on aeroacoustics theory was presented.The noise models of highlift device and landing gear were established to predict airframe noise.The propeller noise model considering the affections of angular inflow and wing-induced flow was used to predict the propeller noise,and combining with the equivalent source method(ESM)to compute the acoustic scattering of propeller noise by airframe.The flight test noise data of propeller airplane was used to verify the prediction codes.The prediction results agree well with flight test data with a difference less than 2 dB at certification points.
作者
王天波
夏冰
杜晨曦
丁亚修
WANG Tian-bo;XIA Bing;DU Chen-xi;DING Ya-xiu(AVIC XAC Commercial Aircraft Co.,Ltd,Xi`an 710089,China)
出处
《科学技术与工程》
北大核心
2023年第27期11870-11877,共8页
Science Technology and Engineering
关键词
涡桨飞机
气动噪声
预估方法
螺旋桨噪声
声散射
turboprop aircraft
aeroacoustics noise
prediction method
propeller noise
sound scattering
