Sources of asymmetric flow over the blunt-nose slender body

Effects of Forebody Geometry on Side Forces on a Cylindrical Afterbody at High Angles of Attack

“…This means that the micro-jet blowing schemes [34], used for controlling the patterns of asymmetric flow to adjust the direction and magnitude of the unbalanced side-forces, need to be adjusted in multiple injections made at several stations along the afterbody. Indeed, this is in agreement with the fact that the control strategy with the jet blowing must depend on the x/d-location along the afterbody [32,33]. On the other hand, the measurements by Gao, et al [29] suggest that the blowing passive jets as an effective control approach only works at the low blowing angles and, indeed, has no significant use in controlling the steady unbalanced side forces.…”

“…There appeared many works aiming to suppress or control the instabilities and to increase the maneuverability [28][29][30][31][32][33][34]. Hence, there is still a strong need to understand the basic mechanisms of the formation and persistence of the vortex systems.…”

Investigation of periodic characteristics of perturbed flow over a slender body

“…This section presented and discussed the periodic characteristics of perturbed flow over the slender body at a high AoA. Based on the previous studies [ 37 , 38 ], a diameter particle of d = 0.004 D was initially applied onto the nosed tip to perturb the asymmetric flow, thereby resulting in a certain flow to be obtained. The major effects of the bluntness ( B ) on the perturbed flows and its corresponding flow separations were first discussed, followed by the effect mechanics of bluntness on the perturbed flow.…”

“…6 presented the variations with x/D of the sectional side-force coefficients ( C y ) at θ = 45° and 135°. The two circumferential locations of perturbation produce stable asymmetric flows [ 37 , 38 ], which were beneficial to the study. As shown in Fig.…”

Experimental Investigation of Free-to-Roll Motion of a Blunt-Nosed Slender Body Configuration

“…However, these papers only describe the motion patterns and lack a discussion on the effects of wings at different axial locations on the free-to-roll motion. Given that extensive investigations have been conducted on the forebody asymmetric vortices over the blunt-nosed slender body, 20,21) further research on the coupling between the forebody vortices and wings, and the roll motion induced, is necessary.…”