南京航空航天大学学报2012，Vol.44Issue(6)：786-791,6.
民用飞机起落架气动噪声数值仿真
Aerodynamic Noise Simulation of Commercial Aircraft Landing Gear
摘要
Abstract
Aerodynamic noise of a commercial aircraft landing gear component is explored. The flow field around the landing gear is produced using detached eddy simulation (DES). The source information is obtained. The acoustic field radiated from the model is calculated via FW-H equation. The influences of course/fine grid on simulation precision and porous/solid integration surface on noise prediction are evaluated by spectra comparison. Frequency spectra and directivity characteristics are investigated. The results show that DES displays the capability to resolve fine-grained turbulence and exhibits the complex vertical structures. The sound pressure level calculated based on the coarse grid is about 1 dB less than that calculated based on the fine grid when using the solid integration surface. The sound pressure level calculated from the porous surface is 5-7 dB greater than that calculated from the solid surface because of the quadrupole sources in the wake. The noise source is relevant to the vortex shedding behind the model. Noise radiation has obvious directivities.关键词
起落架/计算气动声学/分离涡模拟/声类比/气动噪声Key words
landing gear/ computational aeroacoustic/ detached eddy simulation (DES)/ acoustic analogy/ aerodynamic noise分类
航空航天引用本文复制引用
龙双丽,聂宏,薛彩军,许鑫..民用飞机起落架气动噪声数值仿真[J].南京航空航天大学学报,2012,44(6):786-791,6.基金项目
江苏省普通高校研究生科研创新计划(CX10B_105Z,CX10B_088Z)资助项目 （CX10B_105Z,CX10B_088Z）
国家留学基金资助项目 （）
南京航空航天大学研究生创新基地(实验室)开放基金资助项目. （实验室）
