EXPERIMENTAL & NUMERICAL INVESTIGATION EXPERIMENTAL & NUMERICAL INVESTIGATION OF STATIONARY CASCADE RIGOF STATIONARY CASCADE RIG

EXPERIMENTAL & NUMERICAL INVESTIGATION EXPERIMENTAL & NUMERICAL INVESTIGATION OF STATIONARY CASCADE RIGOF STATIONARY CASCADE RIG

ObjectiveObjective

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.

BackgroundBackground

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

Stationary Cascade Rig

Diffuser

Impeller

Air Flow

Research Carried OutResearch 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.

Expected OutcomesExpected 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

Mach number plot of impeller-diffuser