摘要
利用流动稳定性理论中的一般共振三波的概念 ,提出了湍流边界层近壁区域相干结构的理论模型 .采用高精度、高分辨率的紧致有限差分和 Fourier谱展开相结合的方法 ,研究两个相邻相干结构的演化问题 .数值结果表明 ,两个相邻相干结构之间的相互作用很小 。
The theoretical model of the coherent structure in the wall region of a turbulent boundary layer was proposed, using the idea of general resonant triad of the theory of hydrodynamic stability. The problem of the evolution of two neighbouring coherent structures was studied by combining the compact finite differences of higher accuracy and better resolution and the Fourier spectral expansion. The numerical investigations show that the mutual interaction of two neighbouring coherent structure is very weak. In the development of lower reaches, the evolutional mechanism of two neighbouring coherent structues is nearly in keeping with the one of a single coherent structure.
出处
《弹道学报》
CSCD
北大核心
2000年第1期6-10,19,共6页
Journal of Ballistics
基金
中国石油集团公司资助项目
关键词
紧致有限差分
共振三波
相干结构
compact finite difference, resonant triad, coherent structure
