摘要
首先用连续介质耦合模型推导出含高浓度悬浮固粒运动射流的空间稳定性方程 ,然后借助渐进分析法和欧拉守恒差分格式 ,用有限差分数值解法得到不同流向位置、流场雷诺数、固粒属性和喷射装置运动速度时流场的稳定性特征曲线 ,说明喷射装置的反向运动使不稳定扰动频率范围扩大 ,正向运动则相反· 固粒抑制流场的不稳定性 ,随着固粒等效斯托克斯数的减小 ,这种效应增强· 这些结论 。
The spatial stability equation of moving jet containing dense suspended solid particles was derived out by means of the continuum phase_coupled model. The stability curves of moving jet for different downstream distances, Reynolds number of flow_field, particle properties and velocities of jetting device are got by the finite difference method based on the asymptotic method and the Eulerian conservative difference scheme. Founded on the analyses of the obtained stability curves it is found that the positive velocity of jetting device widens the unstable frequency range of flow_field but the effect of the negative one is contrary. In addition, particles existing in the flow_field curb the instability of flow_field and the effect enhances with the decrease of Reynolds number of flow_field. These conclusions benefit learning the development of moving two_phase jet.
出处
《应用数学和力学》
EI
CSCD
北大核心
2000年第12期1255-1264,共10页
Applied Mathematics and Mechanics
基金
教育部跨世纪优秀人才培养计划基金资助项目
关键词
悬浮固粒
连续介质耦合模型
稳定性
数值计算
两相运动射流
suspended solid particles
continuum phase_coupled model
stability
moving jet
numerical computation
