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Nitric Oxide Spectroscopic Measurements in a Hypervelocity Stagnation Flow

Yanes, Nelson J. and Austin, Joanna M. (2019) Nitric Oxide Spectroscopic Measurements in a Hypervelocity Stagnation Flow. In: AIAA Scitech 2019 Forum. AIAA , Reston, VA, Art. No. 2019-0794. ISBN 9781624105784.

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Spatially resolved emission spectra are collected along the stagnation streamline of hypervelocity flow over a circular cylinder. Excitation temperatures are extracted from the NO γ band (A^2Σ^+ - Χ^2Π) emission at downstream locations behind the bow shock. The result is a temperature relaxation profile that quantifies the state of thermal non-equilibrium. Results are compared against a zero-dimensional state-to-state model and a two-temperature, reacting Navier-Stokes simulation. Test gas O_2 mole fraction is varied from 30% to 120% of the air value to examine changes in relaxation profile.

Item Type:Book Section
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Austin, Joanna M.0000-0003-3129-5035
Additional Information:© 2019 American Institute of Aeronautics and Astronautics.
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AIAA Paper2019-0794
Record Number:CaltechAUTHORS:20190805-134838397
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Official Citation:Nitric Oxide Spectroscopic Measurements in a Hypervelocity Stagnation Flow Nelson J. Yanes and Joanna M. Austin AIAA Scitech 2019 Forum.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97652
Deposited By: George Porter
Deposited On:07 Aug 2019 22:34
Last Modified:16 Nov 2021 17:33

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