悬浮固粒分区存在对射流稳定性的影响  

Effect of Non - uniform Suspended Particle Distribution on stability of Jet

作　　者：周泽宣[1] 林建忠[2] 游振江[1] 刘中秋 吴涛[1] 王灿星[1] 

机构地区：[1]浙江大学力学系,杭州310027 [2]杭州应用工程技术学院,杭州310012

出　　处：《力学季刊》2000年第2期204-208,共5页Chinese Quarterly of Mechanics

基　　金：教育部跨世纪优秀人才培养计划基金

摘　　要：本文利用气固两相耦合模型,理论推导出大雷诺数下悬浮固粒分区存在的射流稳定性方程,通过数值计算得到了固粒存在不同流域时流场扰动放大因子曲线和波速曲线。进而,在分析所得稳定性曲线的基础上,得到了关于固粒充满全流场、存在于射流区及存在于非射流区对流场中扰动增长及扰动传播影响的重要结论。这些结论对于气固两相射流场发展的认识和工程实际中实施对气固两相射流场的人工控制有指导意义。The stability equation of moving jet containing non - uniformly distributed particle under large Reynolds number is derived out by means of the phase - coupling model. The amplification factor curves and wave speed curves of two - phase jet for particle non - uniform distribution are given out through numerical computation. Further, several important conclusions on effect of partichle non - uniform distribution on growth and propagation of disturbance in jet field are presented based on analyses of the obtained amplification factor curves and wave speed curves. These conclusions can play a guiding role in studing development of two - phase jet and exectuing artificial controls over it in engineering practice.

关 键 词：悬浮固粒 固粒分区存在 射流 稳定性 

分 类 号：O358[理学—流体力学]