@inproceedings{2c42e02354c741ff99d344862592c34e,
title = "Three-dimensional wave packets in a Mach 10 Boundary Layer on a Sharp Cone",
abstract = "High-resolution Direct Numerical Simulations (DNS) were carried out to identify the dominant nonlinear mechanisms of three-dimensional wave packets in a Mach 10 boundary layer on a 7◦ half-angle straight (right) cone with a “sharp” nose tip at zero angle of attack. Towards this end, nonlinear wave packets were generated with a short-duration pulse. For these simulations the same cone geometry and flow conditions as in the experiments at the Arnold Engineering Development Complex (AEDC) Hypervelocity Wind Tunnel No. 9 (T9) were used. Wave packet simulations deep into the late nonlinear transition stages were carried out for several cases where the pulse disturbances were introduced in different downstream regions of the cone. The computational domain covered a large extent of the cone in the azimuthal direction to allow for a wide range of azimuthal wavenumbers (kc ). The disturbance spectra obtained from the DNS of nonlinear wave packets provided evidence that the so-called fundamental resonance/breakdown was the dominant nonlinear mechanism. Initiating the wave packet at different downstream locations did not change the dominant nonlinear mechanism but had a significant impact on the dominant frequency and wavenumber range. Furthermore, contours of the time-averaged Stanton number exhibited “hot” streaks on the surface of the cone within the wave packet. Hot streaks have also been observed in the Purdue flared cone experiments using temperature sensitive paint (TSP) and in numerical investigations using DNS.",
author = "Christoph Hader and Fasel, {Hermann F.}",
note = "Funding Information: This work was supported by AFOSR Grant FA9550-19-1-0208, with Dr. Sarah Popkin serving as the program manager. Computer time was provided by the University of Arizona High Performance Computing (HPC) center and the Department of Defense (DoD) High Performance Computing Modernization Program (HPCMP). 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 Air Force Office of Scientific Research or the U. S. Government. Publisher Copyright: {\textcopyright} 2021, American Institute of Aeronautics and Astronautics Inc.. All rights reserved.; AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021 ; Conference date: 02-08-2021 Through 06-08-2021",
year = "2021",
doi = "10.2514/6.2021-2943",
language = "English (US)",
isbn = "9781624106101",
series = "AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021",
publisher = "American Institute of Aeronautics and Astronautics Inc, AIAA",
booktitle = "AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021",
}