Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

MODIFICATION OF SHOCK LAYER STRUCTURE UNDER THE IMPACT OF A HIGH INERTIA PARTICLE IN A SUPERSONIC FLOW AROUND BLUNT BODY

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.023830
pages 6831-6836

Abstrakt

The problem of heat transfer enhancement in the presence of relatively large particles in a flow has been of interest for decades. It has been observed in experiments and some empirical models have been developed to describe the effect. At the same time reproducing this phenomena in direct numerical simulation remains a challenging problem due to a wide range of temporal and spatial scales. Here we present the results of numerical simulation of gas-dynamic interaction of a particle with a shock layer. The computational experiments showed that as a reflected from the body surface particle reaches the shock wave a substantial rearrangement of the flow occurs: the destruction of a stationary shock-wave structure and the formation of a conical perturbed region with vertex moving with the particle. An important role in the formation of the wave structure is played by the toroidal vortex. It causes the "inviscid" separation of the axial incoming flow from the axis of symmetry and its further interaction with the external flow and the body surface. An impact ring jet is formed, directed to the surface and as a result, a zone of increased pressure occurs. Passage of the pressure wave along the surface creates conditions for the intensification of convective heat transfer.