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Description
Title: | Post-Shock Thermochemistry in Hypervelocity Carbon Dioxide and Air Flow |
Author(s): | Sharma, Manu |
Doctoral Committee Chair(s): | Joanna Austin |
Department / Program: | Aerospace Engineering |
Discipline: | Aerospace Engineering |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | Ph.D. |
Genre: | Dissertation |
Subject(s): | Engineering, Aerospace |
Abstract: | We also examine spatial temperature profiles in the non-equilibrium relaxation region behind a stationary shock wave in a hypervelocity air Mach 7.42 freestream. The normal shock wave is established through a Mach reflection from an opposing wedge arrangement. Schlieren images confirm that the shock configuration is steady and the location is repeatable. Emission spectroscopy is used to identify dissociated species and to make vibrational temperature measurements using both the nitric oxide and the hydroxyl radical A-X band sequences. Temperature measurements are presented at selected locations behind the normal shock. LIFBASE is used as the simulation spectrum software for OH temperature-fitting, however the need to access higher vibrational and rotational levels for NO leads to the use of an in-house developed algorithm. For NO, results demonstrate the contribution of higher vibrational and rotational levels to the spectra at the conditions of this study. Very good agreement is achieved between the experimentally measured NO vibrational temperatures and calculations performed using an existing state-resolved, three-dimensional forced harmonic oscillator thermochemical model. The measured NO A-X vibrational temperatures are significantly higher than the OH A-X temperatures. |
Issue Date: | 2010 |
Type: | Text |
Language: | English |
Description: | 160 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2010. |
URI: | http://hdl.handle.net/2142/85120 |
Other Identifier(s): | (MiAaPQ)AAI3452268 |
Date Available in IDEALS: | 2015-09-25 |
Date Deposited: | 2010 |
This item appears in the following Collection(s)
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Dissertations and Theses - Aerospace Engineering
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois