摘要
利用小波分析技术提取燃烧室压力高频成分,较精确确定压力高频振荡出现的时域范围,从而确定了振荡流共振振型对应的燃烧室形状。推导了燃气振荡流方程,计算了对应不同燃烧室形状下燃气振荡流的共振频率。对提取的燃烧室压力高频成分相对集中部分进行了频谱分析。研究结果表明:活塞的运动对共振频率影响较小,振荡流多阶共振频率受到激励是燃烧室产生压力高频振荡的一个重要原因。
The pressure high-frequency components in combustion chamber are obtained to define the appearance ranges of pressure high-frequency oscillation accurately, and to define the resonance model of the oscillation fluid corresponding combustion chamber shape by the method of wavelet analysis. The oscillation fluid equations are established and the resonance frequency of the oscillation fluid is calculated with different combustion chamber shapes. The oscillation pressure obtained in combustion chamber is analyzed. The results show that the resonance frequency is influenced a little by piston movement and several ranks resonance frequency of the oscillation fluid aroused is the important cause of the pressure high-frequency oscillation in combustion chamber.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2006年第4期491-494,498,共5页
Journal of Nanjing University of Science and Technology
基金
"十五"国防预研项目
关键词
再生式液体发射药火炮
小波分析
压力高频振荡
共振频率
振荡流
regenerative liquid propellant guns
wavelet analysis
pressure high-frequency oscillation
resonance frequency
oscillation fluid
