@inproceedings{988a4a7ef4684dd999a3fed47cdfa181,
title = "Development of new techniques for studying unsteady behavior in hypersonic boundary layer interactions",
abstract = "Shock dominated separated laminar hypersonic flows over a double cone geometry were investigated by analyzing unsteady direct simulation Monte Carlo signals with the residuals algorithm for unit Reynolds numbers gradually increasing from 9.35×104 to 3.74×105 m−1 at a Mach number of 16. To investigate the origin of the striations in the bow shock observed in the amplitude functions of the highest Re number case, the momentum density was decoupled into thermal and acoustic parts using Doak{\textquoteright}s momentum potential theory. The spatial distribution of the acoustic and thermal fields was found to be uniform for the lowest Reynolds number case whereas alternating patterns, especially in the vicinity of the separation zone and the triple point were observed for the acoustic field of the highest Reynolds number case. The thermal component of the momentum density was found to be large at the cone shoulder at later times due to a Kelvin-Helmholtz instability.",
author = "Ozgur Tumuklu and Levin, {Deborah A.} and Vassilis Theofilis",
note = "Funding Information: The research of O.T. and D.A.L. is being supported by the Air Force Office of Scientific Research through AFOSR Grant No. FA9550-11-1-0129 with a subcontract Award No.2010-06171-01 to UIUC. O.T. and D.A.L. are also grateful for the computational resource provided on ERDC Topaz and Onyx, AFRL Thunder and Centennial. The work of V.T. is sponsored by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under Grant No. FA9550-15-1-0387 Global transient growth mechanisms in high-speed flows with application to the elliptic cone, and Grant No. FA9550-17-1-0115 Global Modal and Non-Modal Instability Analyses of Shock-Induced Separation Bubbles, with V.T. as Principal Investigator and Dr. Ivett Leyva as Program Officer. Funding Information: The research of O.T. and D.A.L. is being supported by the Air Force Office of Scientific Re- Funding Information: of Scientific Research, Air Force Material Command, USAF, under Grant No. Funding Information: The work of V.T. is sponsored by the Air Force Office Funding Information: search through AFOSR Grant No. FA9550-11-1-0129 with a subcontract Award No.2010-06171-01 Publisher Copyright: {\textcopyright} 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.; 48th AIAA Fluid Dynamics Conference, 2018 ; Conference date: 25-06-2018 Through 29-06-2018",
year = "2018",
doi = "10.2514/6.2018-3709",
language = "English (US)",
isbn = "9781624105531",
series = "2018 Fluid Dynamics Conference",
publisher = "American Institute of Aeronautics and Astronautics Inc, AIAA",
booktitle = "2018 Fluid Dynamics Conference",
}