“…The ratio of the jet to the crossflow momentum for confined conditions presents an appropriate scaling factor for the geometric aspects of the recirculation zone [14][15][16][17]. Figure 5 shows the mean flow streamline pattern for three momentum ratio cases (MR 0:26, 0.42, and 0.76) as measured using PIV under nonreacting and reacting conditions (nonreacting conditions shown in Figs.…”