Formation of a reverse flow behind the Mach diskat various Reynolds numbers
A.N. Kudryavtsev, A.V. Kashkovsky, A.A. Shershnev
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: supersonic nonisobaric jets, shock wave structure, axisymmetric flow, rarefied gas, viscous effects
Abstract
The issue of the existence of a reverse flow behind the Mach disk in the first shock cell of a supersonic underexpanded jet is numerically studied on the basis of solving the Navier-Stokes equations. It is shown that the reverse flow existence depends on the Reynolds number: it arises at low Reynolds numbers and vanishes when the Reynolds number exceeds a certain value. Thus, for experimental observations of this paradoxical phenomenon, it is necessary to perform experiments with jets of a sufficiently rarefied gas.
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