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Factors influencing flow steadiness in laminar boundary layer shock interactions

Tumuklu, Ozgur and Levin, Deborah A. and Gimelshein, Sergey F. and Austin, Joanna M. (2016) Factors influencing flow steadiness in laminar boundary layer shock interactions. In: 30th International Symposium on Rarefied Gas Dynamics. AIP Conference Proceedings. No.1786. American Institute of Physics , Melville, NY, Art. No. 050005. ISBN 978-0-7354-1448-8. http://resolver.caltech.edu/CaltechAUTHORS:20170105-140420436

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Abstract

The Direct Simulation Monte Carlo method has been used to model laminar shock wave boundary interactions of hypersonic flow over a 30/55-deg double-wedge and “tick-shaped” model configurations studied in the Hypervelocity Expansion Tube facility and T-ADFA free-piston shock tunnel, respectively. The impact of thermochemical effects on these interactions by changing the chemical composition from nitrogen to air as well as argon for a stagnation enthalpy of 8.0 MJ/kg flow are investigated using the 2-D wedge model. The simulations are found to reproduce many of the classic features related to Edney Type V strong shock interactions that include the attached, oblique shock formed over the first wedge, the detached bow shock from the second wedge, the separation zone, and the separation and reattachment shocks that cause complex features such as the triple point for both cases. However, results of a reacting air flow case indicate that the size of the separation length, and the movement of the triple point toward to the leading edge is much less than the nitrogen case.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.4967555DOIArticle
http://aip.scitation.org/doi/abs/10.1063/1.4967555PublisherArticle
Additional Information:© 2016 AIP Publishing LLC. The research is being performed at the University of Illinois Urbana-Champaign is supported by the Air Force Office of Scientific Research through AFOSR Grant No. FA9550-11-1-0129 with a subcontract award number 2010-06171-01 to UIUC. This research is also a part of the Blue Waters sustained-petascale computing project, which is supported by the National Science Foundation (awards OCI-0725070 and ACI-1238993) and the state of Illinois. Blue Waters is a joint effort of the University of Illinois at Urbana-Champaign and its National Center for Supercomputing Applications.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-11-1-0129
Air Force Office of Scientific Research (AFOSR)2010-06171-01
NSFOCI-0725070
NSFACI-1238993
State of IllinoisUNSPECIFIED
Subject Keywords:Separated flow, hypersonic flow, DSMC, reacting air, velocity slip
Record Number:CaltechAUTHORS:20170105-140420436
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170105-140420436
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73279
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:06 Jan 2017 16:08
Last Modified:02 Nov 2017 20:24

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