Article

Heat and Mass Transfer and Physical Gasdynamics
2020. V. 58. № 6. P. 839–845
Reviznikov D.L., Sposobin A.V., Ivanov I.E.
Comparative analysis of calculated and experimental data on an oscillating flow induced by the gasdynamic interaction of a particle with a shock layer
Annotation
A supersonic flow around a cylinder with a flat end is studied for the case in which a single particle is launched from the end surface towards the incident flow. Numerical modeling is carried out with allowance for the gas-dynamic interaction of the particle with the shock layer. High-resolution, adaptive, rectangular grids are used to obtain detailed spatial and temporal flow patterns. The calculation results are compared with experimental data. It is shown that a single, large particle moving along the axis of symmetry against the incident flow and crossing the bow shock wave causes a significant restructuring of the flow and the formation of complex shock-wave and vortex structures. An important role in the formation of the flow structure is played by the formation of a toroidal vortex, which leads to an “inviscid” separation of the incident flow from the axis of symmetry. A distinctive feature of the flow around a cylinder with a flat end is the oscillatory flow regime caused by alternating stages of growth and decay of a toroidal vortex. The patterns of the oscillating flow and the oscillation frequency obtained via numerical simulation are in good agreement with the experimental data.
Article reference:
Reviznikov D.L., Sposobin A.V., Ivanov I.E. Comparative analysis of calculated and experimental data on an oscillating flow induced by the gasdynamic interaction of a particle with a shock layer, High Temp., 2020. V. 58. № 6. P. 839