EXPERIMENTAL

1
EXPERIMENTAL NUMERICAL INVESTIGATION OF
STATIONARY CASCADE RIG
Background
Diffuser
Velocity fields in centrifugal compressors have
been mostly analyzed using CFD. However, an
experimental study is needed to validate the
results from the CFD model.
Stationary Cascade Rig
Air Flow
Impeller
Objective
Experimentally investigate the flow field with
the use of LDV to validate CFD results.
Numerically simulate particle tracking to
optimize seeding for LDV experiments.
Impeller hub side optical access
2
Research Carried Out
A facility has been designed to validate the use
of LDV and to show that optical access and
seeding into such a highly confined region is
possible. CFD simulations show that particle
dispersion is sufficient for LDV measurements.
Mach number plot of impeller-diffuser
Expected Outcomes
Validation of the LDV technique in
highly-confined complex regions. Validation of
CFD results of flow field and particle tracking
to aid in optimizing seeding for future optical
measurements.
CFD results of seeding particles upstream