Flow Properties of a Dusty-Gas Point Source in a Supersonic Free Stream
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摘要: 采用Lagrange方法,研究了超声速气流中含灰气体点源的流动特性,求得了对称轴附近激波层内的流动参数。计算数值模拟结果揭示了大惯性颗粒在激波层内沿着相互交叉的振荡轨迹运动,颗粒分布形成了高、低密度层交错出现的"多层结构",而且粒子在轨迹包络线附近急剧聚集。Abstract: By using Lagrangian method,the flow properties of a dusty-gas point source in a supersonic free stream were studied and the particle parameters in the near-symmetry-axis region were obtained.It is demonstrated that fairly inertial particles travel along oscillating and intersecting trajectories between the bow and termination shock waves.In this region,formation of "multi-layer structure" inparticle distribution with alternating low-and high-density layers is revealed.Moreover,sharp accumulation of particles occurs near the envelopes of particle trajectories.
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Key words:
- dusty gas /
- supersonic flow /
- point source /
- particle inertia /
- trajectory intersection /
- multi-layer structure
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