有均匀平均流的圆环管道声模态及其应用  

Acoustic Modes in Annular Duct with Uniform Mean Flow and Their Applications

作　　者：柳占新[1,2] 黄其柏[1] 

机构地区：[1]华中科技大学数字制造装备与技术国家重点实验室,武汉430074 [2]中国船舶重工集团710研究所,宜昌443003

出　　处：《中国机械工程》2011年第13期1558-1563,共6页China Mechanical Engineering

基　　金：国家留学基金委建设高水平大学公派研究生项目([2008]3019)

摘　　要：有平均流的圆环管道中的声传播规律不仅为计算气动声学提供验证算例,还可以由此近似研究一些复杂结构的声传播现象。从控制方程出发,推导了有平均流的圆环管道声模态的色散与声功率的关系,并提供了求解超越色散关系方程的方法,得到了单个声模态的解析表达式。以圆环管道中的单个声模态作为输入,模拟了涡扇发动机进气道的声传播过程。The sound wave propagation in annular duct with mean flow can be used to validate calculation results of computational aeroacoustics and to approximately investigate the mechanism of acoustic wave propagation in complex geometries.The dispersion relation of acoustic modes in annular duct with mean flow was deduced from the governing equation,Euler equation,and the methods to find solutions to the dispersion relation equation were presented.The way to compute sound power in the duct with mean flow was also included.And then sound wave propagation at the inlet of a jet engine was simulated by prescribing a single acoustic mode.

关 键 词：圆环管道 声模态 计算气动声学 喷气发动机 进气道 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]