Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow
This paper presents spatially resolved measurements of absolute particle densities of N2, N2+, N, O, N+, O+, e− and excitation temperatures of electronic, rotational and vibrational modes of an air plasma free stream. All results are based on optical emission spectroscopy data. The measur...
| Hlavní autoři: | , , , |
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| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
Elsevier
2017
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| _version_ | 1826285232607723520 |
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| author | Hermann, T Loehle, S Zander, F Fasoulas, S |
| author_facet | Hermann, T Loehle, S Zander, F Fasoulas, S |
| author_sort | Hermann, T |
| collection | OXFORD |
| description | This paper presents spatially resolved measurements of absolute particle densities of N2, N2+, N, O, N+, O+, e− and excitation temperatures of electronic, rotational and vibrational modes of an air plasma free stream. All results are based on optical emission spectroscopy data. The measured parameters are combined to determine the local mass–specific enthalpy of the free stream. The analysis of the radiative transport, relative and absolute intensities, and spectral shape is used to determine various thermochemical parameters. The model uncertainty of each analysis method is assessed. The plasma flow is shown to be close to equilibrium. The strongest deviations from equilibrium occur for N, N+ and N2+ number densities in the free stream. Additional measurements of the local mass-specific enthalpy are conducted using a mass injection probe as well as a heat flux and total pressure probe. The agreement between all methods of enthalpy determination is good. |
| first_indexed | 2024-03-07T01:25:46Z |
| format | Journal article |
| id | oxford-uuid:91ecf7e8-872c-459a-a780-85f49a1a7348 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:25:46Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:91ecf7e8-872c-459a-a780-85f49a1a73482022-03-26T23:21:58ZMeasurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flowJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:91ecf7e8-872c-459a-a780-85f49a1a7348EnglishSymplectic ElementsElsevier2017Hermann, TLoehle, SZander, FFasoulas, SThis paper presents spatially resolved measurements of absolute particle densities of N2, N2+, N, O, N+, O+, e− and excitation temperatures of electronic, rotational and vibrational modes of an air plasma free stream. All results are based on optical emission spectroscopy data. The measured parameters are combined to determine the local mass–specific enthalpy of the free stream. The analysis of the radiative transport, relative and absolute intensities, and spectral shape is used to determine various thermochemical parameters. The model uncertainty of each analysis method is assessed. The plasma flow is shown to be close to equilibrium. The strongest deviations from equilibrium occur for N, N+ and N2+ number densities in the free stream. Additional measurements of the local mass-specific enthalpy are conducted using a mass injection probe as well as a heat flux and total pressure probe. The agreement between all methods of enthalpy determination is good. |
| spellingShingle | Hermann, T Loehle, S Zander, F Fasoulas, S Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow |
| title | Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow |
| title_full | Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow |
| title_fullStr | Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow |
| title_full_unstemmed | Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow |
| title_short | Measurement of the aerothermodynamic state in a high enthalpy plasma wind-tunnel flow |
| title_sort | measurement of the aerothermodynamic state in a high enthalpy plasma wind tunnel flow |
| work_keys_str_mv | AT hermannt measurementoftheaerothermodynamicstateinahighenthalpyplasmawindtunnelflow AT loehles measurementoftheaerothermodynamicstateinahighenthalpyplasmawindtunnelflow AT zanderf measurementoftheaerothermodynamicstateinahighenthalpyplasmawindtunnelflow AT fasoulass measurementoftheaerothermodynamicstateinahighenthalpyplasmawindtunnelflow |