PIV consensus dataset readme

The consensus dataset is the amalgamation of many years of PIV test data acquired on NASA GRCs SHJAR. Briefly, the files contained in this dataset present velocity statistics (mean and variance) of jet plumes for 7 defined setpoints (SP):
SP   Vj/c   Tj/T    NPR     M
 3   0.500   0.950   1.197   0.513
 7   0.900   0.835   1.861   0.985
23   0.500   1.764   1.102   0.376
27   0.900   1.764   1.357   0.678
29   1.330   1.764   1.888   1.001
46   0.900   2.700   1.219   0.548
49   1.485   2.700   1.678   0.904

For each setpoint there are 6 files, e.g.:
Tx_X_SP3_1ptn_Sym.datfull-field single-point statistics, average of all tests
Tx_X_SP3_1ptn_Sig.datfull-field single-point statistics, variance of all tests
Tx_X_SP3_SimpleR.datsubset (radial profiles), 
Tx_X_SP3_SimpleRSig.datsubset (radial profiles), variance of all tests
Tx_X_SP3_SimpleX.datsubset (axial profiles), average of all tests
Tx_X_SP3_SimpleXSig.datsubset (axial profiles), variance of all tests

The point of this is that if you want to grab mean and turbulence values at any arbitrary location in jet plume or make contour plots, use the test-averaged _Sym.dat files. If you want to know how good the numbers are at any arbitrary location, look for the entry in the test-variance _Sig.dat files. If you only want to deal with a few common spatial locations for line plots, use the Simple* files.

All data is public domain, nozzle geometries available upon request.

James Bridges (james.e.bridges@nasa.gov)
NASA GRC, 2010

