| A flat plate test apparatus that has
been developed for use in the Matched-Index-of-Refraction (MIR) Facility.
Experiments to measure mean and turbulence quantities within the viscous
layer and near wall region of the boundary layer are underway. The outer
flow conditions include an elevated free-stream turbulence level and
free-stream acceleration chosen to simulate conditions on the suction side
of a turbine vane over the first one-third of the vane. A turbulence trip
is located just downstream of the leading edge of the flat plate model.
The trip was designed to simulate the boundary layer disturbances due to
the film cooling jets of a turbine blade. Baseline measurements over a
smooth plate have been completed. We are currently completing the detailed
design for a realistic rough surface model. The model is patterned after a
suction side surface that was evaluated by Major Jeffrey Bons at AFRL. We
plan to collect and analyze the rough plate results in the fall of 2002.
An additional graduate student has been added to the project team (Mr.
William Dalling). He is designing floating element sensors with the
objective of obtaining direct measurements of wall Shear Stress
for both the smooth and rough plate models.
See Power
Point Slides of Project Summary to date |
