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An experimental and numerical comparison of cold-flow structures from two configurations of a 7-point lean direct injector array was completed for this study. The comparison seeks to have the computational model aid in understanding of the experimental flow fields and expand on the underlying physics involved. Qualitative data of mean axial velocity contours as well as quantitative data of mean axial profiles facilitated the comparison between experiment and numerical solutions. Experimental data was collected using particle image velocimetry (PIV) with water seeding through the center fuel nozzle. The numerical computation was carried out with NASA’s OpenNCC (Open National Combustion Code) using steady state Reynolds Averaged Navier-Stokes (RANS) simulation to calculate gas phase velocities. There were notable quantitative differences in the average axial velocity profiles, especially at locations closest to the dump plane. However, good qualitative agreement was consistent for each 7-point configuration.

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