Langley Research Center Turbulence Modeling Resource

Exp: CFDVAL2004 Case 2 Experimental Data

Return to: CFDVAL2004 Case 2 - Intro Page

Using LDV, phase-averaged experimental data for Case 2 are available in the following files:

These two files give the same data in two different ways. The data include the following:

• Phase-averaged data every 10 deg "bins" (0-10, 10-20, 20-30,..., 340-350, 350-360 deg) of u, v, w, u'u', v'v', w'w', u'v', u'w', and v'w' at y=0 along 6 lines: along z at x=44.74 mm, along z at x=57.1 mm, along z at x=63.28 mm, along z at x=101.6 mm, along x near orifice at z=0.4 mm, and along x near orifice and near 2D downstream at z=10 mm

Using LDV, long-time-averaged experimental data for Case 2 are available in the following file:

These data include the following:

• Long-time-averaged data of u, v, w at y=0 along 6 lines: along z at x=44.74 mm, along z at x=57.1 mm, along z at x=63.28 mm, along z at x=101.6 mm, along x near orifice at z=0.4 mm, and along x near orifice and near 2D downstream at z=10 mm

Using 2D-PIV and Stereo-PIV, both phase averaged and long-time-averaged experimental data for Case 2 are available in the following file:

These data include the following:

• Phase-averaged stereo-PIV data of u, v, w at x=1D and 4D downstream of orifice
• Long-time-averaged stereo-PIV data of u, v, w at x=1D and 4D downstream of orifice
• Phase-averaged 2D-PIV data of u, w at y=0 (centerplane) near orifice
• Long-time-averaged 2D-PIV data of u, w at y=0 (centerplane) near orifice

Note: The Stereo-PIV (SDPIV) data is included here in the interest of completeness, as they represent the only data currently available in the spanwise direction. The out-of-plane component (u) is consistent with the other measurement techniques, but the in-plane components (v and w) are not. Therefore, any analysis involving the in-plane components from the SDPIV experiment should take this inconsistency into account.

Note: Case 2 experimental data are being reported in the following coordinate system: x-direction downstream, z-direction up, y-direction spanwise. The coordinate system's origin (0,0,0) is on the tunnel splitter plate, 8 diameters (0.0508 m) directly upstream of the center of the orifice (the orifice diameter is 0.25 inches = 0.00635 m).

Sample plots (from LDV) of phase-averaged u and w velocity at approximately 1D downstream of the center of the orifice:

Sample plots (from LDV) of phase-averaged u and w velocity just above the orifice along x at z=0.4 mm, y=0:

Sample plots (from LDV) of long-time-averaged u and w velocity at three x-stations:

Return to: CFDVAL2004 Case 2 - Intro Page

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Responsible NASA Official: Ethan Vogel
Page Curator: Clark Pederson
Last Updated: 05/15/2021