30 C. Jin, I. Potts, D. C. Swailes, M. W. Reeks 0 20 40 60 80 100 120 140 160 180 θ 0.0 0.2 0.4 0.6 0.8 1.0 C p ′ (a) LES Exp 0 20 40 60 80 100 120 140 160 180 θ 0.0 0.2 0.4 0.6 0.8 1.0 C ′ p (b) LES Exp 0 20 40 60 80 100 120 140 160 180 θ 0.0 0.2 0.4 0.6 0.8 1.0 C ′ p (c) LES Exp 0 20 40 60 80 100 120 140 160 180 θ 0.0 0.2 0.4 0.6 0.8 1.0 C ′ p (d) LES Exp Fig. 7: surface fluctuating pressure distribution as a function of angle from the front stagnation point over 30 non-dimensional time units,(a) C1 , (b) C2 , (c) C3 , (d) C4