中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2011年
13期
1558-1563
,共6页
圆环管道%声模态%计算气动声学%喷气发动机%进气道
圓環管道%聲模態%計算氣動聲學%噴氣髮動機%進氣道
원배관도%성모태%계산기동성학%분기발동궤%진기도
annular duct%acoustic mode%computational aero acoustics（CAA）%engine%inlet
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。
有平均流的圓環管道中的聲傳播規律不僅為計算氣動聲學提供驗證算例,還可以由此近似研究一些複雜結構的聲傳播現象。從控製方程齣髮,推導瞭有平均流的圓環管道聲模態的色散與聲功率的關繫,併提供瞭求解超越色散關繫方程的方法,得到瞭單箇聲模態的解析錶達式。以圓環管道中的單箇聲模態作為輸入,模擬瞭渦扇髮動機進氣道的聲傳播過程。
유평균류적원배관도중적성전파규률불부위계산기동성학제공험증산례,환가이유차근사연구일사복잡결구적성전파현상。종공제방정출발,추도료유평균류적원배관도성모태적색산여성공솔적관계,병제공료구해초월색산관계방정적방법,득도료단개성모태적해석표체식。이원배관도중적단개성모태작위수입,모의료와선발동궤진기도적성전파과정。
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.
