Quiet Direct Numerical Simulations of BOLT-II Roughness-Induced Transition

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


The recent BOLT-II sounding rocket flight experiment made measurements of boundary layer transition and fully turbulent flow at approximately Mach 6 conditions. The Side-A experiment had a smooth surface, and the Side-B experiment was designed to measure boundary layer trip effectiveness. This paper uses a novel grid generation method with highorder, low-dissipation numerical methods to simulate the descent trajectory of the Side-B experiment and compare with the flight data. The use of hexahedral hanging-node grids facilitates the resolution of the trip geometry and the growth and breakdown of the wake instabilities. The simulations show that similar to prior work, the counter-rotating vortex pairs generated by the trip become unstable in the wake and form lifted hairpin vortices, which then interact and cause breakdown to turbulence. The comparison between the simulations and flight heat flux data is compelling, with the simulations correctly predicting transition onset and the forward movement of transition with increasing Reynolds number. There is quantitative agreement with most heat flux sensors.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum and Exposition, 2024
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624107115
StatePublished - 2024
EventAIAA SciTech Forum and Exposition, 2024 - Orlando, United States
Duration: Jan 8 2024Jan 12 2024

Publication series

NameAIAA SciTech Forum and Exposition, 2024


ConferenceAIAA SciTech Forum and Exposition, 2024
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2024 by Graham V. Candler. Published by the American Institute of Aeronautics and Astronautics, Inc. with permission.


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