Numerical simulation of a shock tube in thermochemical non-equilibrium
<p>An efficient method is developed for calculating the non-equilibrium properties of the test gas in a shock tube in the shock frame of reference. The one dimensional method is based on the parabolised Navier-Stokes equations, resulting in a form similar to a stagnation line problem but with...
| Main Authors: | , , , |
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| Format: | Conference item |
| Language: | English |
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American Institute of Aeronautics and Astronautics
2023
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| _version_ | 1826309296770514944 |
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| author | Clarke, JP Glenn, A McGilvray, M Di Mare, L |
| author_facet | Clarke, JP Glenn, A McGilvray, M Di Mare, L |
| author_sort | Clarke, JP |
| collection | OXFORD |
| description | <p>An efficient method is developed for calculating the non-equilibrium properties of the test gas in a shock tube in the shock frame of reference. The one dimensional method is based on the parabolised Navier-Stokes equations, resulting in a form similar to a stagnation line problem but with appropriate consideration of the mass loss to the boundary layer present in a shock tube. Gas properties are determined using Park’s two temperature model. Transport properties are evaluated using second order Chapman-Enskog theory. The centreline solution is coupled to an artificial radial pressure profile which mimics the effect of a boundary layer. The method was tested on a variety of air cases ranging from 5.5 km/s to 9.6km/s, and demonstrated improved modelling of the non-equilibrium regions compared to a Rankine-Hugoniot solver. A 6.1 km/s, 13.3 Pa test case relevant for Titan entry demonstrates the necessity of appropriately modelling mass loss to the boundary layer in a shock tube. The effect of shock structure and mass loss to the boundary layer in a non-equilibrium flow within a shock tunnel is shown to substantially impact the test gas properties and non-equilibrium radiance profiles in the UV/Vis and Vis/IR regions.</p> |
| first_indexed | 2024-03-07T07:32:06Z |
| format | Conference item |
| id | oxford-uuid:896859e1-2517-4180-98d4-b9e8bc3953a8 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:32:06Z |
| publishDate | 2023 |
| publisher | American Institute of Aeronautics and Astronautics |
| record_format | dspace |
| spelling | oxford-uuid:896859e1-2517-4180-98d4-b9e8bc3953a82023-01-30T11:06:12ZNumerical simulation of a shock tube in thermochemical non-equilibriumConference itemhttp://purl.org/coar/resource_type/c_5794uuid:896859e1-2517-4180-98d4-b9e8bc3953a8EnglishSymplectic ElementsAmerican Institute of Aeronautics and Astronautics2023Clarke, JPGlenn, AMcGilvray, MDi Mare, L<p>An efficient method is developed for calculating the non-equilibrium properties of the test gas in a shock tube in the shock frame of reference. The one dimensional method is based on the parabolised Navier-Stokes equations, resulting in a form similar to a stagnation line problem but with appropriate consideration of the mass loss to the boundary layer present in a shock tube. Gas properties are determined using Park’s two temperature model. Transport properties are evaluated using second order Chapman-Enskog theory. The centreline solution is coupled to an artificial radial pressure profile which mimics the effect of a boundary layer. The method was tested on a variety of air cases ranging from 5.5 km/s to 9.6km/s, and demonstrated improved modelling of the non-equilibrium regions compared to a Rankine-Hugoniot solver. A 6.1 km/s, 13.3 Pa test case relevant for Titan entry demonstrates the necessity of appropriately modelling mass loss to the boundary layer in a shock tube. The effect of shock structure and mass loss to the boundary layer in a non-equilibrium flow within a shock tunnel is shown to substantially impact the test gas properties and non-equilibrium radiance profiles in the UV/Vis and Vis/IR regions.</p> |
| spellingShingle | Clarke, JP Glenn, A McGilvray, M Di Mare, L Numerical simulation of a shock tube in thermochemical non-equilibrium |
| title | Numerical simulation of a shock tube in thermochemical non-equilibrium |
| title_full | Numerical simulation of a shock tube in thermochemical non-equilibrium |
| title_fullStr | Numerical simulation of a shock tube in thermochemical non-equilibrium |
| title_full_unstemmed | Numerical simulation of a shock tube in thermochemical non-equilibrium |
| title_short | Numerical simulation of a shock tube in thermochemical non-equilibrium |
| title_sort | numerical simulation of a shock tube in thermochemical non equilibrium |
| work_keys_str_mv | AT clarkejp numericalsimulationofashocktubeinthermochemicalnonequilibrium AT glenna numericalsimulationofashocktubeinthermochemicalnonequilibrium AT mcgilvraym numericalsimulationofashocktubeinthermochemicalnonequilibrium AT dimarel numericalsimulationofashocktubeinthermochemicalnonequilibrium |