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.
