A proper understanding of vorticity production, reorientation, and annihilation around and in the wake of complex three-dimensional bodies such as unmanned combat air vehicles (UCAVs) would provide critical insight for effective flow-control development in unsteady environments. Force measurement, surface pressure measurement, and time-resolved planar flow visualization at high Reynolds number for steady and unsteady translations have been carried out on a NACA 0012 airfoil wing with triangular planform geometry. At high angles of attack, the flow field exhibits sensitivity to axial acceleration when initially separated across the midspan. Flow field data analysis included a finite-time Lyapunov exponent analysis shows a topological change in the coherent structure during different axial accelerations.
|Original language||English (US)|
|Title of host publication||AIAA Scitech 2019 Forum|
|Publisher||American Institute of Aeronautics and Astronautics Inc, AIAA|
|State||Published - 2019|
|Event||AIAA Scitech Forum, 2019 - San Diego, United States|
Duration: Jan 7 2019 → Jan 11 2019
|Name||AIAA Scitech 2019 Forum|
|Conference||AIAA Scitech Forum, 2019|
|Period||1/7/19 → 1/11/19|
Bibliographical noteFunding Information:
This work was supported by the Office of Naval Research under ONR Award No. N00014-16-1-2732.
© 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.