Alexeenko, A. A. and Kulakhmetov, M. and Weaver, A. and Slipchenko, M. N. and Mihaly, J. and Adams, M. and Rosakis, A. (2012) Feasibility of Non-Equilibrium Hypersonic Flow Measurements at the Small Particle Hypervelocity Impact Range. In: 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2012-0596. ISBN 9781600869365. https://resolver.caltech.edu/CaltechAUTHORS:20190828-102318872
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Abstract
Currently used hypersonic flow models, such as high-enthalpy reaction and energy relaxation rates, are based on experiments conducted at relatively low flow enthalpies and are highly uncertain. This paper presents analysis of the feasibility of calibrating hypersonic flow parameters using free-flight experiments at the Small Particle Hypervelocity Range (SPHIR) at Caltech/JPL. Chemically reacting, nonequilibrium flows around a 2-mm diameter spherical projectile are modeled using the Direct Simulation Monte Carlo (DSMC) method. The flowfields generated by DSMC simulations are used to calculate emission spectra in order to determine the observable radiation in UV/vis spectral range. Bayesian calibration and generalized polynomial chaos expansion (gPCE) techniques are used to assess the sensitivity of observable flow properties to key reaction rates. These techniques are then used to predict how experimental resolution would affect the uncertainty in the calibrated parameters.
Item Type: | Book Section | ||||||
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Additional Information: | © 2012 by the authors. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. | ||||||
Group: | GALCIT | ||||||
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DOI: | 10.2514/6.2012-596 | ||||||
Record Number: | CaltechAUTHORS:20190828-102318872 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190828-102318872 | ||||||
Official Citation: | Feasibility of Non-Equilibrium Hypersonic Flow Measurements at the Small Particle Hypervelocity Impact Range Alina Alexeenko, Marat Kulakhmetov, Andrew Weaver, M Slipchenko, Jonathan Mihaly, Marc Adams, and Ares Rosakis 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. https://doi.org/10.2514/6.2012-596 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 98311 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | George Porter | ||||||
Deposited On: | 28 Aug 2019 18:30 | ||||||
Last Modified: | 16 Nov 2021 17:38 |
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