Computational fluid dynamics has been used to study inviscid
shock interactions on
double-wedge geometries with the purpose of understanding the fundamental
gas
dynamics of these interactions. The parameter space of the interactions
has been
explored and the different types of interactions that occur have been identified.
Although the interactions are produced by a different geometry, all but
one of them
may be identified as an Edney Type I, IV, V, or VI interaction. The previously
unidentified interaction occurs because of the geometrical constraints
imposed by
the double wedge. The physical mechanisms for transition have been studied,
and
the transition criteria have been identified. An important result
is that there are two
different regimes of the parameter space in which the state of the flow
downstream
of the interaction point is fundamentally different. At high Mach numbers
this flow
is characterized by an underexpanded jet which impinges on the wedge and
produces
large-amplitude surface pressure variations. At low Mach numbers, the jet
becomes
a shear layer which no longer impinges on the wedge surface.
AERODYNAMIC MODELING OF OSCILLATING WING IN HYPERSONIC FLOW: A NUMERICAL STUDY