Abstract

The features of a flow generated during the injection of a supersonic small body (pellet) from the channel of a spherically blunted cylinder into a supersonic flow are studied. The cylinder’s diameter is 35 times larger than the diameter of the injected body. The numerical simulation is carried out using multilevel Cartesian grids with the local adaptation based on the wavelet analysis. The body’s motion is simulated by the free boundary method. The dynamics of the moving body’s interaction with the bow shock from the cylinder, the formation of the reverse flow region between the bodies, its evolution and disappearance, and the subsequent establishment of a stationary flow are studied. The decrease of the main body’s drag to 20% of the initial value is demonstrated.

中文翻译：

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超声速分离运动体中回流流动的数值模拟

摘要

研究了从球形钝圆柱体的通道向超声速流注入超音速小物体（小球）时产生的流的特征。圆柱体的直径是注射体直径的35倍。使用基于小波分析的局部自适应的多层笛卡尔网格进行数值模拟。身体的运动是通过自由边界法模拟的。研究了运动物体与圆柱体的弓形冲击相互作用的动力学，物体之间逆流区域的形成，其演化和消失以及随后建立的平稳流动。证明了主体阻力减小到初始值的20％。