  Recent theoretical results together with established theory have identified
the displacement thickness and the velocity at the boundary layer edge as
similarity scaling parameter candidates for the wall-bounded turbulent boundary
layer. In the work described herein, we examine these scaling parameters along
with the Prandtl Plus scaling's and the Zagarola and Smits scaling's to search
for similarity in the outer region of experimental turbulent boundary layer
velocity profile datasets. A new integral area method combined with the
traditional chi-by-eye method is used to search for similar velocity profiles.
The results indicate that strict whole profile similarity is not evident in any
of the datasets we searched. However, ten datasets are found that display
"similar-like" behavior using the ratio of the inner to outer thickness ratio
as a search criterion. In alignment with theory, the preferred similarity
scaling parameters for the similar-like behavior case are the displacement
thickness and the velocity at the boundary layer edge. It was found that there
are a few datasets for which the Prandtl Plus scaling and the Zagarola and
Smits scaling also work.
