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Mechanical and Aerospace Engineering Dept.
University of California, Los Angeles
Abstract-
The receptivity of hypersonic boundary layers to
freestream disturbances, which is the process of
environmental disturbances initially entering the
boundary layers and generating the growth of instabilities,
is altered considerably by the presence of
bow shocks in the flow fields.
Numerical simulation of the stability and receptivity
of hypersonic boundary layers over blunt leading edges and cones
requires high-order accurate numerical methods to resolve
a wide range of time and length scales and
to resolve unsteady bow shock motion
and shock/disturbance interaction accurately.
In this talk, we will present: 1) our work
on the development of accurate numerical methods
for numerical studies of hypersonic reacting
and non-reacting flow phenomena associated with
boundary-layer transition in 3-D hypersonic flows,
and 2) the results of numerical studies of
leading-edge receptivity of 2-D and 3-D hypersonic
boundary layers over blunt leading edges and cones.
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