Data Set Index - Paul Johnson, PhD thesis, Stanford University, 1990.

 The test facility is a free surface water channel consisting of an asymmetric
4:1 contraction, a 4.88 m long straight development section with dimensions 25
cm (width) by 1.25m (span), a 90 degree constant radius curved wall (R = -136
cm), and a straight recovery section.  The channel walls are contoured to
minimize pressure gradient in the straight development section and along the
concave test surface.  The boundary layer is tripped 1 m downstream of the
nozzle exit using a .476 cm square rod.  Spanwise surveys show good spanwise
uniformity; specifically, the roll cells which appear in the curved section are
not fixed in space, but are randomly distributed in space and time.  LDV
measurements of all three velocity-component were made down to y+ = 5 approx, u'
and w' at even smaller y+.

Nomenclature

x streamwise distance, relative to the start of curvature

d, delta boundary layer thickness, based on U = .99Ue

Upw free-stream velocity (flat plate cases) or wall potential velocity (curved
cases)

utau wall friction velocity

nu kinematic viscosity

theta momentum thickness

shape factor ratio of momentum thickness to displacement thickness

y+ distance from wall non-dimensionalized by utau and nu

U mean velocity

Up local potential velocity, = Upw(1+y/R)

Uc modified mean velocity, = U(1+y/R)

Uc+ Uc non-dimensionalized by utau

u',v',w' rms fluctuating streamwise, normal, and spanwise velocity

u'v' Reynolds shear stress

Ruv shear stress correlation coefficient

a1 structure parameter, = u'v'/(u'u'+v'v'+w'w')

uuu,uuv,etc.  velocity triple products

uskw,vskw,wskw skewness factors for u, v, and w

uflt,vflt,wflt flatness factors for u, v, and w

 Each case has two data sets, for example CN601 and CN602.  Files with suffix 1
contain mean, rms, and Reynolds shear stress profiles; files with suffix 2
contain profiles of triple products and skewness and flatness factors.

 The following five data sets are for naturally developing velocity profiles,
with no grid-generated turbulence present.

FN Measurements at x=-56 cm

CN15 Measurements at the 15 degree station, x=35.5 cm

CN30 Measurements at the 30 degree station, x=71 cm

CN45 Measurements at the 45 degree station, x=106.5 cm

CN60 Measurements at the 60 degree station, x=142 cm

 For the following data sets, a square, biplanar, square bar grid (mesh spacing
M = 6.35cm; ratio of mesh spacing to bar width M/w = 4) was used to generate
nearly axisymmetric turbulence.  Except where noted, the free-stream turbulence
levels were nominally u'/Upw = .05.

FG19 Measurements at x = -56 cm; grid placed at x = -177 cm (19M upstream of
measurement station). Slight grid bar wake effects in u'v' profiles.  No higher
order moments.

FG10 Measurements at x = -56 cm; grid placed at x = -120 cm (19M upstream of
measurement station). Free-stream turbulence intensity u'/Upw = .075.  Some grid
bar wake effects in u'v' profiles.  No higher order moments.

CG15 Measurements at the 15 degree station, x=35.5 cm.  Grid placed at x=-127
cm.  CG30 Measurements at the 30 degree station, x=71 cm.  Grid placed at x=-92
cm.

CG45 Measurements at the 45 degree station, x=106.5 cm.  Grid placed at x=-56
cm.

CG60 Measurements at the 60 degree station, x=142 cm.  Grid placed at x = -32
cm.

