     The turbulent fluid mechanics group, Experimental Research Branch, Wright 
Research and Development Center, welcomes you to use their experimental data of 
isothermal confined swirling flow in a dump combustor.

     First of all, you need to know that these data were collected using a Two 
Component LDV System; therefore, the data were collected in the horizontal and 
the vertical planes to get the 3-components information of the velocity field.

     Secondly, you need to know the data were non-dimensionalized and were 
stored on two floppy disk files.  File #1 has most of the data you may need 
(i.e. X1/H, Y1/H, non-dimensional stream function1 , U1/Uref , V/Uref , W/Uref , 
K/U2ref , u'1/Uref , v'/Uref , w'/Uref , 100 uv/U2ref and 100 uw/U2ref).  
On the other hand, file #2 has additional data you may not require 
(i.e., X2/H , Y2/H , non-dimensional stream functions2 , U2/Uref , 100 Su1 , 100 
Sv , 100 Sw , 100 u2v/U3ref , 100 uv2/U3ref , 100 u2w/U3ref and 100 uw2/U3ref).  
Please note that subscript "1" means measurements in the horizontal plane while 
subscript "2" means measurements in the vertical plane, and most of the symbols 
are standard.  "S" denotes skewness and Su denotes skewness of "u".  All the 
data are time averaged.  

     The details of the rig, flow conditions and nomenclature used were reported 
earlier in any of the following papers:

1.  Nejad, A. S., Favaloro, S. C., Vanka, S. P., Samimy, M., and Langenfeld, C., 
"Application of Laser Velocimetry for Characterization of Confined Swirling 
Flow." Journal of Engineering for Gas Turbines and Power, Vol. III, 1989, pp. 
36-45.

2.  Ahmed, S. A., Boray, R. S., and Nejad, A. S., "An Experimental Investigation 
of Isothermal Swirling Flow in a Model of a Dump Combustor," IX ISABE, Athens, 
1989.

3.  Favaloro, S. C., Nejad, A. S., Ahmed, S. A., Miller, T., and Vanka, S. P., 
"An Experimental and Computational Investigation of Isothermal Swirling Flow in 
an Axisymmetric Dump Combustor," AIAA Paper No. 89-0620, 1989.

     The data is in ASCII Format and were generated using "Enable" software.  
The data should be easily readable using any software which handles ASCII files.

     We hope that all the information you need is included, and the data are 
presented in a useful format for you.  We welcome your comments to improve the 
presentation of our data or putting it in a different format.  If you do have 
any comments, we welcome them as well.  Please do not hesitate to call any of us 
if you have any questions.  With our best regards.



AHMED/NEJAD/BORAY
Experimental Research Branch
Wright-Patterson AFB OH 45433-6563
513-255-9991
