Experimental assessment of the internal flow behavior of supercritical carbon dioxide

Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2014.

Bibliographic Details
Main Author: Yang, David(Scientist in aeronautics and astronautics) Massachusetts Institute of Technology
Other Authors: Zoltán Spakovszky.
Format: Thesis
Language:eng
Published: Massachusetts Institute of Technology 2015
Subjects:
Online Access:http://hdl.handle.net/1721.1/93803
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author Yang, David(Scientist in aeronautics and astronautics) Massachusetts Institute of Technology
author2 Zoltán Spakovszky.
author_facet Zoltán Spakovszky.
Yang, David(Scientist in aeronautics and astronautics) Massachusetts Institute of Technology
author_sort Yang, David(Scientist in aeronautics and astronautics) Massachusetts Institute of Technology
collection MIT
description Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2014.
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spelling mit-1721.1/938032023-03-22T15:46:56Z Experimental assessment of the internal flow behavior of supercritical carbon dioxide Yang, David(Scientist in aeronautics and astronautics) Massachusetts Institute of Technology Zoltán Spakovszky. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Aeronautics and Astronautics. Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2014. Cataloged from PDF version of thesis. Includes bibliographical references (pages 119-121). This thesis presents an experimental assessment of the internal flow behavior of supercritical carbon dioxide. The investigation focused mainly on assessing condensation onset during rapid expansion of CO₂ into the two-phase region. An experimental blowdown test-rig with a modular test section was developed with the capability of operating a converging-diverging nozzle with a wide range of charge conditions. The test-rig demonstrated repeatable results with relative errors of less than 1 percent. An innovative method to measure the speed of sound through the use of Helmholtz resonators was developed and investigated. Shock tube experiments and static high pressure air tests in the blowdown facility were conducted to determine the viscous damping in the resonators. The results indicate that a Helmholtz resonator neck Reynolds number of 106 is required for underdamped response. The speed of sound measurement technique was demonstrated at relevent Reynolds numbers and at static conditions in air, showing promise for blowdown testing in S-CO₂ Blowdown experiments were conducted in supercritical CO₂ from charge conditions both away and near the critical point to sonic conditions in the two-phase region. To determine whether there was condensation onset, static pressure measurements were compared to theoretical and numerical models. Numerical models utilized the Span-Wagner equation of state extrapolated into the two-phase region to characterize the metastable state. Away from the critical point, for operating conditions typically encountered in S-CO₂ compressor stages, condensation was not observed. Near the critical point, results were inconclusive and future work is proposed to provide more conclusive assessment of condensation near the critical region. by David Yang. S.M. 2015-02-05T18:22:55Z 2015-02-05T18:22:55Z 2014 2014 Thesis http://hdl.handle.net/1721.1/93803 900611867 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 121 pages application/pdf Massachusetts Institute of Technology
spellingShingle Aeronautics and Astronautics.
Yang, David(Scientist in aeronautics and astronautics) Massachusetts Institute of Technology
Experimental assessment of the internal flow behavior of supercritical carbon dioxide
title Experimental assessment of the internal flow behavior of supercritical carbon dioxide
title_full Experimental assessment of the internal flow behavior of supercritical carbon dioxide
title_fullStr Experimental assessment of the internal flow behavior of supercritical carbon dioxide
title_full_unstemmed Experimental assessment of the internal flow behavior of supercritical carbon dioxide
title_short Experimental assessment of the internal flow behavior of supercritical carbon dioxide
title_sort experimental assessment of the internal flow behavior of supercritical carbon dioxide
topic Aeronautics and Astronautics.
url http://hdl.handle.net/1721.1/93803
work_keys_str_mv AT yangdavidscientistinaeronauticsandastronauticsmassachusettsinstituteoftechnology experimentalassessmentoftheinternalflowbehaviorofsupercriticalcarbondioxide