摘要
将双谱、双相干分析应用于射流边界流动的实验研究。结果表明 ,对流场中采集的时序记录进行的双相干估计可有效地指示出 ,流场中何处、及什么频率的波间可能发生非线性相互作用。双谱、双相干分析是流体力学研究中一个有效的、不可或缺的技术手段。
The bispectrum and bicoherence is applied in the experiment of a jet boundary. Experimental results show that the estimation of bicoherence for the time series from a jet boundary can be used as an index, which indicates effectively that the waves in some range of frequency may undergo a nonlinear interaction in some position in the jet flow. It is proposed that bispectrum and bicoherence is an effective and necessary tool in nonlinear fluid mechanics.
出处
《数据采集与处理》
CSCD
2002年第1期46-49,共4页
Journal of Data Acquisition and Processing
