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Variations of harmonic structure with blowing parameters. Lines and arrows show actual blowing conditions and practical ranges, respectively. All parameters other than the one being varied were fixed to the actual blowing conditions shown in Table 1 (θ j = 39°, y j,e = 0.24, l/h = 5.6, Q = 16 L/min). Error bar is shown for each measured value. In (a), y j,e > 0 means that the reference jet direction is directed to outside the edge.
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