We investigate the effect of realistic distributed roughness and variable wall temperature on the BoLT geometry at flight conditions. Utilizing a Fourier filtering method, we mimic the roughness commonly measured on machined surfaces. The resulting flowfields are compared with that obtained from a randomly distributed roughness. Our analysis demonstrates that the distribution of roughness has considerable effect on the observed flow features. In addition to this, we also investigate the effect of variable wall temperature due to conjugate heat transfer along the flight trajectory. A loosely coupled conjugate heat transfer simulation is performed to quantify this effect on the wall temperature. Our results show that variable wall temperature increases the boundary layer thickness and considerably modifies the flow structures along the centerline.
|Original language||English (US)|
|Title of host publication||AIAA Scitech 2020 Forum|
|Publisher||American Institute of Aeronautics and Astronautics Inc, AIAA|
|Number of pages||15|
|State||Published - 2020|
|Event||AIAA Scitech Forum, 2020 - Orlando, United States|
Duration: Jan 6 2020 → Jan 10 2020
|Name||AIAA Scitech 2020 Forum|
|Conference||AIAA Scitech Forum, 2020|
|Period||1/6/20 → 1/10/20|
Bibliographical noteFunding Information:
This work was sponsored by the Air Force Office of Scientific Research Grant FA9550-17-1-0250 by the Collaborative Center for Aeronautical Sciences (CCAS). The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR or the U.S. Government.