Lagrangian modelling of dust admixture in gas flows
Lagrangian modelling of dust admixture in gas flows
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DOI：
10.1023/a:1026557603451
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发表时间：
2000-01-01
影响因子：
1.9
通讯作者：
Osiptsov, AN
中科院分区：
文献类型：
--
作者：
Osiptsov, AN
提出了一种基于粒子连续性方程的拉格朗日形式计算含尘气流中分散相浓度的方法。该方法使得计算沿固定颗粒轨迹的颗粒浓度并研究具有颗粒轨迹和颗粒积累区域的多个交叉点的流动区域成为可能。通过对高超音速流与来自点源的两相超音速流（彗核蒸发模型）碰撞的近对称轴区域的数值计算来说明该方法的使用。结果表明，在弓形冲击波和终止冲击波之间，颗粒浓度分布可能具有多层结构，其中颗粒浓度高低交替，颗粒轨迹包络附近颗粒聚集明显。
A method of calculating the dispersed-phase concentration in dusty gas flow, based on using the Lagrange form of the particle continuity equation, is developed. The method makes it possible to calculate the particle concentration along a fixed particle trajectory and to investigate flow regions with multiple intersection of particle trajectories and particle accumulation zones. The use of the method is illustrated by numerical calculations of the near-symmetry-axis region in a hypersonic flow colliding with a two-phase supersonic flow from a point source (the model of evaporation of a comet nucleus). It is demonstrated that, between the bow and termination shock waves, the particle concentration distribution may have a multi-layer structure with alternating layers of high and low particle concentration and sharp particle accumulation near the envelops of the particle trajectories.