Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point
This work presents the oxidation response of a transpiration-cooled hypersonic stagnation point made of porous ZrB2. Low-order models are used to calculate the surface temperature and oxygen concentration for a given flight condition. An analytical material oxidation model computes the surface reces...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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American Institute of Aeronautics and Astronautics
2022
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| _version_ | 1797108144261824512 |
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| author | Ewenz Rocher, M Hermann, T McGilvray, M |
| author_facet | Ewenz Rocher, M Hermann, T McGilvray, M |
| author_sort | Ewenz Rocher, M |
| collection | OXFORD |
| description | This work presents the oxidation response of a transpiration-cooled hypersonic stagnation point made of porous ZrB2. Low-order models are used to calculate the surface temperature and oxygen concentration for a given flight condition. An analytical material oxidation model computes the surface recession and oxide layer thickness. A 500 s steady-state trajectory at 44 km altitude and 3.6 km/s velocity is found to lead to 2.2 mm recession of the 3 mm nose radius. A constant mass injection at a blowing parameter of 0.6 reduces the recession to just 0.21 mm. The displacement of freestream oxygen by transpiration cooling has a significant effect on oxidation. Not accounting for the displacement of oxygen at the surface would increase the recession by up to 197%. The recession along the transient trajectory of an envisioned hypersonic vehicle with a 3 mm nose radius is found to exceed 0.94 mm with no mass injection. It is shown that nitrogen and helium injection at a blowing parameter of 0.6 can reduce the recession to 0.13 and 0.075 mm, respectively.
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| first_indexed | 2024-03-07T07:25:16Z |
| format | Journal article |
| id | oxford-uuid:0efc0bf5-c618-471c-a6b7-d9891c815214 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:25:16Z |
| publishDate | 2022 |
| publisher | American Institute of Aeronautics and Astronautics |
| record_format | dspace |
| spelling | oxford-uuid:0efc0bf5-c618-471c-a6b7-d9891c8152142022-11-16T10:18:40ZOxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation pointJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0efc0bf5-c618-471c-a6b7-d9891c815214EnglishSymplectic ElementsAmerican Institute of Aeronautics and Astronautics2022Ewenz Rocher, MHermann, TMcGilvray, MThis work presents the oxidation response of a transpiration-cooled hypersonic stagnation point made of porous ZrB2. Low-order models are used to calculate the surface temperature and oxygen concentration for a given flight condition. An analytical material oxidation model computes the surface recession and oxide layer thickness. A 500 s steady-state trajectory at 44 km altitude and 3.6 km/s velocity is found to lead to 2.2 mm recession of the 3 mm nose radius. A constant mass injection at a blowing parameter of 0.6 reduces the recession to just 0.21 mm. The displacement of freestream oxygen by transpiration cooling has a significant effect on oxidation. Not accounting for the displacement of oxygen at the surface would increase the recession by up to 197%. The recession along the transient trajectory of an envisioned hypersonic vehicle with a 3 mm nose radius is found to exceed 0.94 mm with no mass injection. It is shown that nitrogen and helium injection at a blowing parameter of 0.6 can reduce the recession to 0.13 and 0.075 mm, respectively. |
| spellingShingle | Ewenz Rocher, M Hermann, T McGilvray, M Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point |
| title | Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point |
| title_full | Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point |
| title_fullStr | Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point |
| title_full_unstemmed | Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point |
| title_short | Oxidation response of transpiration-cooled ZrB2 on a hypersonic stagnation point |
| title_sort | oxidation response of transpiration cooled zrb2 on a hypersonic stagnation point |
| work_keys_str_mv | AT ewenzrocherm oxidationresponseoftranspirationcooledzrb2onahypersonicstagnationpoint AT hermannt oxidationresponseoftranspirationcooledzrb2onahypersonicstagnationpoint AT mcgilvraym oxidationresponseoftranspirationcooledzrb2onahypersonicstagnationpoint |