摘要
针对安装固定受油装置的飞机,采用雷诺平均N-S方程(RANS)求解流场、非线性噪声求解方程(NLAS)求解声场相结合的方法,对飞机驾驶舱周围的噪声变化情况进行了模拟,给出了在一定飞行条件下受油管附近驾驶舱周围不同位置的声压云图及声压频谱图,并将安装有受油装置的飞机和原型机在相同条件、相同位置的声压频谱、噪声进行对比。结果显示,安装受油管后舱外噪声声压级较原型机增加3d B左右。
The combination of Reynolds-averaged Navier-Stokes （RANS） and Non-linear Acoustics Solver （NLAS） solving flow field and acoustical field respectively were applied to simulate the variation of noise for the fixed refueling tube mounted on a certain type of aircraft. Acoustics pressure contour and noise spectra at different positions were given. Then, in the same position and condition, it compared the aircraft＇s installed refueling device with prototype＇s acoustics pressure spectrum and noise. The results show that an increase of 3 dB in acoustics pressure level can be expected.
出处
《航空科学技术》
2015年第9期74-78,共5页
Aeronautical Science & Technology
关键词
非线性声学
受油管
噪声预测
RAN$
non-linear acoustics
refueling tube
noise prediction
RANS
