含周期脉动的大密度比气液同轴射流的Floquet稳定性分析  

Floquet Instability of a Large Density Ratio Liquid-Gas Coaxial Jet With Periodic Fluctuation

作　　者：李振[1] 胡国辉[1] 周哲玮[1] 

机构地区：[1]上海大学,上海市应用数学和力学研究所,上海市能源与环境中的关键力学问题重点实验室,上海200072

出　　处：《应用数学和力学》2008年第8期883-892,共10页Applied Mathematics and Mechanics

基　　金：国家自然科学基金资助项目(10772107);上海市科委资助项目(071605102)

摘　　要：基于周期脉动速度激励下气液同轴射流的数学模型,运用线性稳定性理论,采用Chebyshev配点法和Floquet理论,将含周期脉动分层流的Floquet稳定性分析扩展到大密度比的情况.研究了液铝-氮气射流的参数共振特性,分析了不同的物理参数对系统稳定性的影响,计算了实验工况并和实验结果进行了比较.By the numerical simulation of basic flow, Floquet stability analysis of inteffacial flow with periodic fluctuation into large density ratio range were extended. The stability of a liquidaluminum jet in a coaxial nitrogen stream with velocity fluctuation was investigated by Chebyshev collocation method and the Floquet theory. The parametric resonance of the jet and the influences of different physical parameters on the instability were discussed. The results show qualitative agreement with the experimental data available.

关 键 词：射流稳定性 Chebyshev配点法 FLOQUET理论 参数共振 大密度比 

分 类 号：O358[理学—流体力学]