Interactions between an oblique shock wave generated by a single sharp fin placed on a cylindrical surface and a distorted incoming boundary layer are studied to investigate the possibility of generating high maneuverability for future munition systems. Well-quantified distortions are generated via micro-ramp vortex generators to embed strong streamwise vortices into the boundary layer. These vortex generators (VG) are 1.0 and 0.6 incoming boundary layer thicknesses tall, and their geometries are configured based on literature guidelines. The distortion magnitude determined based on the mean difference in the streamwise velocity from the undistorted boundary layer, integrated over boundary layer height, is between 20%-34% for a M = 2.6 boundary layer. The control forces and moments are determined using the mean surface pressure field for different VGs placed at different azimuthal locations with respect to the fin leading edge. These configurations resulted in up to 15%, 18% and 24% change in the fin-normal force, rolling and pitching moments, respectively, compared to the unperturbed results. The impact on the pitching moments provides compelling evidence that perturbing the boundary layer and exploiting the associated fin-generated shock boundary layer interactions is a viable strategy to enable high maneuverability in munitions.
|Original language||English (US)|
|Title of host publication||2018 Fluid Dynamics Conference|
|Publisher||American Institute of Aeronautics and Astronautics Inc, AIAA|
|State||Published - 2018|
|Event||48th AIAA Fluid Dynamics Conference, 2018 - Atlanta, United States|
Duration: Jun 25 2018 → Jun 29 2018
|Name||2018 Fluid Dynamics Conference|
|Other||48th AIAA Fluid Dynamics Conference, 2018|
|Period||6/25/18 → 6/29/18|
Bibliographical noteFunding Information:
for this investigation has been provided by the Army Research Office under grant W911NF-16-1-0072. The authors also thank Dr. Matthew Bryant and Ben Kirschmeier of North Carolina State University for their assistance in manufacturing the vortex generators.
Funding for this investigation has been provided by the Army Research Office under grant W911NF-16-1-0072. The authors also thank Dr. Matthew Bryant and Ben Kirschmeier of North Carolina State University for their assistance in manufacturing the vortex generators.