To work with high cruise efficiency, the High Speed Civil Transport (HSCT)
inlet is designed to work under the so called ``critical operation''.
The critical operation locates a terminal shock just downstream of the
throat to maintain high total pressure recovery with the maximum mass flow.
However, the terminal shock location is very sensitive to disturbance and
can be pushed out of the inletto cause the inlet unstart. The inlet unstart
will introduce instability to the
whole aircraft and may also cause engine surge. The propulsion system
works inefficiently when an inlet unstarts.
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for more information.
The purpose of our current project is to coordinate our
feature extraction and
feature tracking
and other visualization techniques for the
HSCT inlet Unstart problem at angle of attack for an
axisymmetric center/cowl arrangement.
NASA VDC inlet cross section
3D Simulation of HSCT Inlet at the Angle of Attack. The mesh resolution is
72 x 16 x 42. Shocks are extracted from the dataset.
The terminal shock is tracked and then isolated with the
feature tracking
algorithm. Its centroid position is computed over time.
