Fig. 16

C_pp(Δ_ξ,0,Δ_t) for low-frequency wall pressure at probe points in Group 2. Contour levels are [0.5:0.1:1] for solid and [-1:0.1:-0.5] for dashed. The slopes of the dashed lines are 0.45 q_∞ in a, 0.5 q_∞ in b, 0.425 q_∞ in c, 0.43 q_∞ in d, 0.46 q_∞ in e and 0.45 q_∞ in f