DATA FILE LIST:
---------------

Files contain LDV data from the 6:1 prolate spheroid. Measurements were made
at two angles of attack -- 10 and 20 degrees.  At 10 degrees aoa, measurements
were made at 5 different axial stations -- x/L = 0.4, 0.6, 0.752, 0.762 and
0.772.  The data at x/L = 0.772 was measured during two different tunnel
entries, and thus some of the profiles are repeated.  At 20 degrees aoa,
measurements were made at 2 different axial stations -- x/L = 0.6 and 0.772.
Some of this data was presented in "Measurements of the Turbulence Structure
in the Vincinity of a 3-D Separation" by C. J. Chesnakas and R. L. Simpson in
the Journal of Fluids Engineering, Vol. 118, No. 1, March 1996. ( June 1996 )


The files are in two formats, ASCII text (.TXT), and Lotus 1-2-3 release 3
(.WK3).  Best looking and most preciese results will be obtained using the
1-2-3 files.  Measurements in the WK3 files are in both the local-freestream
and the wall-collateral coordinate system.  The TXT files list measurements
only in the wall-collateral corrdinate system.  Note that the spreadsheet
files have multiple pages.

The files containing the data are as follows:

   File          Description
------------------------------------------------------------------
 README        This file
 PS-LDV.TXT    All time-averaged velocity measurements
 PS-LDV-S.TXT  Boundary-layer profile summary
 PS-TKE.TXT    TKE balance at 10 degrees aoa, x/L = 0.7622
 PS-LDV10.WK3  All measurements at 10 degrees aoa
 PS-LDV10.FM3  Formatting info for PS-LDV10.WK3
 PS-LDV20.WK3  All measurements at 20 degrees a
 PS-LDV20.FM3  Formatting info for PS-LDV20.WK3
 PS-TKE.WK3    TKE balance at 10 degrees aoa, x/L = 0.7622
 PS-TKE.FM3    Formatting info for PS-TKE.WK3



EXPERIMENT CONFIGURATION:
-------------------------

The model is 54 x 9 inches, and has a BL trip at x/L=0.2.  Measurements were
at 10 and 20 degrees AOA (alpha in the tables) and at a Reynolds number
of 4.2e06 based on the length of the model.  The Mach number was less than
0.1, so the flow should be considered incompressible.


EXPLANATION OF DATA IN TABLES:
------------------------------

The flow angle, beta, is measured relative to the longitudinal direction,
and the sign convention is such that positive flow angles mean that
the flow is moving toward the upwind (windward) side of the model.  The flow
angles listed as "wall collateral" (_wc) and "local-freestream" are measured
relative to the wall-flow direction and the edge-flow direction, respectively.
These two angles are listed for each profile station in the boundary-layer
summary tables.

In the local-freestream coordinate system, y is perpendicular to the wall, x
is parallel to the wall and in the direction of the flow at the edge of the
boundary layer ( beta_e ) and z completes the right-hand rule (pointing
toward the windward side).

In the wall-collateral coordinate system, y is perpendicular to the wall, x
is parallel to the wall and in the direction of the flow at the wall (beta_w)
and z completes the right-hand rule (pointing toward the windward side).

In the boundary-layer summary tables, the momentum thickness Reynolds number,
Re(theta) and the skin friction, Cf, are listed twice -- once normalized by
the local boundary layer edge velocity, Ue, and once by the wind-tunnel
approach velocity, Uinf.

Measurements are normalized by the local friction velocity, u*.  u*/Uinf can
easily be calculated from the skin-friction coefficients in the boundary-layer
summary tables.

The skin friction coefficient, Cf, was derrived by fitting the velocity
measurements in the collateral wall region to the Spalding wall law.

The listed BL thicknesses are somewhat imprecise (it is difficult to define
the 99% velocity point in a curving flow, especially with experimental data)
and should only be used as references.

Estimated measurement uncertainties are listed in the above noted JFE article.