航空科学技术
航空科學技術
항공과학기술
Aeronautical Science and Technology
2015年
9期
74-78
,共5页
非线性声学%受油管%噪声预测%RANS
非線性聲學%受油管%譟聲預測%RANS
비선성성학%수유관%조성예측%RANS
non-linear acoustics%refueling tube%noise prediction%RANS
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3dB左右。
針對安裝固定受油裝置的飛機,採用雷諾平均N-S方程(RANS)求解流場、非線性譟聲求解方程(NLAS)求解聲場相結閤的方法,對飛機駕駛艙週圍的譟聲變化情況進行瞭模擬,給齣瞭在一定飛行條件下受油管附近駕駛艙週圍不同位置的聲壓雲圖及聲壓頻譜圖,併將安裝有受油裝置的飛機和原型機在相同條件、相同位置的聲壓頻譜、譟聲進行對比。結果顯示,安裝受油管後艙外譟聲聲壓級較原型機增加3dB左右。
침대안장고정수유장치적비궤,채용뢰낙평균N-S방정(RANS)구해류장、비선성조성구해방정(NLAS)구해성장상결합적방법,대비궤가사창주위적조성변화정황진행료모의,급출료재일정비행조건하수유관부근가사창주위불동위치적성압운도급성압빈보도,병장안장유수유장치적비궤화원형궤재상동조건、상동위치적성압빈보、조성진행대비。결과현시,안장수유관후창외조성성압급교원형궤증가3dB좌우。
The combination of Reynolds-averaged Navier-Stokes (RANS) and Non-linear Acoustics Solver (NLAS) solving lfow ifeld and acoustical ifeld respectively were applied to simulate the variation of noise for the ifxed 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 instaled 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.