Effect of steady forcing mechanisms on bolt geometry for flight conditions

John Thome, John Reinert, Graham V. Candler

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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 languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages15
ISBN (Print)9781624105951
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum


ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States

Bibliographical note

Funding 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.

Publisher Copyright:
© 2020 American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Copyright 2021 Elsevier B.V., All rights reserved.


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