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Figure 6-8 A) and C) are individual Lissajous figures taken at 93% span vs. 64% chord
location, which corresponds to the shock recovery region as seen in Figure 6-5 A). In this region,
a great deal of unsteadiness is observed along with the previously mentioned odd figure-eight-
like shape due to the continuous phase variation. The 3-D plot in C) reveals that the Cp varies
little time, although the signal is noisy. The sinusoidal shape is due to the fact that the local
vertical displacement is sinusoidal. Figure 6-8 B) and D) are individual Lissajous figures taken at
88% span vs. 81% chord location, which corresponds to the region aft of the shock recovery as
seen in Figure 6-6 A). Similarly, a great deal of unsteadiness and another odd figure-eight-like
shape due to the continuous phase variation is seen. The 3-D plot in D) is similar to that in C).
Figure 6-9 shows the set of Lissajous plots for the 8Hz ±0.5° case. Most of the plots are
open in nature. Much of the forward portion of the wing exhibits the 90° phase shift seen in the
1Hz ±2° case. However, upon movement inboard toward the wing root, a more elliptical
behavior emerges. Near the transition from counter-clockwise to clockwise rotation, regions of
180° phase shift are seen. Observation of the figure-eights and other “odd” shapes are seen in
this region, indicating a continuous phase variation within 1 cycle. However, there is no “noise”
observed along the TE as is seen in the 1Hz ±2° case. Overall, the Lissajous figures for both roll
oscillation cases differ significantly at and aft of the shock region.
Figure 6-10 A) and C) are individual Lissajous figures taken at 93% span vs. 65% chord
location, which corresponds to the shock recovery region as seen in Figure 6-5 C). In this region,
an odd figure-eight-like shape due to the continuous phase variation is observed which is much
different from the one seen with the 1Hz case. The 3-D plot in C) provides more insight as to
how the Cp varies with time. Notably, a loop feature is seen occurring in the first half of the
cycle. This is due to both the sinusoidal response of the Cp and the local displacement being out
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