Comparative Analysis of Calculated and Experimental Data on an Oscillating Flow Induced by the Gasdynamic Interaction of a Particle with a Shock Layer

• Published in: High temperature Vol. 58; no. 6; pp. 839 - 845
• Main Authors: Reviznikov, D. L., Sposobin, A. V., Ivanov, I. E.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.11.2020; Springer Nature B.V
• Subjects: Atoms and Molecules in Strong Fields; Classical and Continuum Physics; Computational fluid dynamics; Cylinders; Flow control; Flow distribution; Fluid flow; Heat and Mass Transfer and Physical Gasdynamics; Industrial Chemistry/Chemical Engineering; Laser Matter Interaction; Materials Science; Mathematical models; Oscillating flow; Physical Chemistry; Physics; Physics and Astronomy; Shock waves; Supersonic flow; Symmetry; Vortices
• ISSN: 0018-151X; 1608-3156
• DOI: 10.1134/S0018151X20060164

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.