Development and validation of an in-situ recession measurement technique for ablative materials.
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| Title: | Development and validation of an in-situ recession measurement technique for ablative materials. |
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| Authors: | Trotsky, Mitchell1 (AUTHOR), Baccarella, Damiano1 (AUTHOR) dbaccare@utk.edu |
| Source: | Journal of Physics D: Applied Physics. 8/11/2025, Vol. 58 Issue 32, p1-18. 18p. |
| Subjects: | Ablative materials, Laser measurement, Material erosion, University of Tennessee (System), Thermal shielding, Measuring instruments, High-speed aeronautics, Surface analysis, Plasma torch |
| Abstract: | Thermal protection materials for high-speed flight vehicles are subject to conditions that can cause ablation and recession of the surface. Quantifying the magnitude of this behavior in ground testing facilities is critical for materials selection and design. Existing experimental methods to measure the recession rate in high-enthalpy flows require expensive equipment, extensive post-processing, or tampering with the material sample. In this study, an in-situ non-intrusive technique to measure the surface recession rate of an ablative material is presented. This method, called multipoint laser transmissivity, is based on the transmission of multiple laser beams over an ablative surface. These laser sheets are collected by photodiodes that, when properly calibrated, provide a signal proportional to the recession of the sample surface. The method was tested in the HyperMATE plasma torch facility at the University of Tennessee. Coupon-size PTFE and graphite samples were tested over a range of heat fluxes and exposure times to induce a variety of recession behaviors and magnitudes. Time resolved schlieren imaging and ex-situ 3D scanning with an optical profilometer were used as validation and verification tools. Good agreement between the different measurement techniques was found, with an accuracy of 4% on the total recession and 10% on the recession rate. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 188025655 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Development and validation of an in-situ recession measurement technique for ablative materials. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Trotsky%2C+Mitchell%22">Trotsky, Mitchell</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Baccarella%2C+Damiano%22">Baccarella, Damiano</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dbaccare@utk.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Physics+D%3A+Applied+Physics%22">Journal of Physics D: Applied Physics</searchLink>. 8/11/2025, Vol. 58 Issue 32, p1-18. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Ablative+materials%22">Ablative materials</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+measurement%22">Laser measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Material+erosion%22">Material erosion</searchLink><br /><searchLink fieldCode="DE" term="%22University+of+Tennessee+%28System%29%22">University of Tennessee (System)</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+shielding%22">Thermal shielding</searchLink><br /><searchLink fieldCode="DE" term="%22Measuring+instruments%22">Measuring instruments</searchLink><br /><searchLink fieldCode="DE" term="%22High-speed+aeronautics%22">High-speed aeronautics</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+analysis%22">Surface analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+torch%22">Plasma torch</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Thermal protection materials for high-speed flight vehicles are subject to conditions that can cause ablation and recession of the surface. Quantifying the magnitude of this behavior in ground testing facilities is critical for materials selection and design. Existing experimental methods to measure the recession rate in high-enthalpy flows require expensive equipment, extensive post-processing, or tampering with the material sample. In this study, an in-situ non-intrusive technique to measure the surface recession rate of an ablative material is presented. This method, called multipoint laser transmissivity, is based on the transmission of multiple laser beams over an ablative surface. These laser sheets are collected by photodiodes that, when properly calibrated, provide a signal proportional to the recession of the sample surface. The method was tested in the HyperMATE plasma torch facility at the University of Tennessee. Coupon-size PTFE and graphite samples were tested over a range of heat fluxes and exposure times to induce a variety of recession behaviors and magnitudes. Time resolved schlieren imaging and ex-situ 3D scanning with an optical profilometer were used as validation and verification tools. Good agreement between the different measurement techniques was found, with an accuracy of 4% on the total recession and 10% on the recession rate. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1088/1361-6463/adf5d2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Ablative materials Type: general – SubjectFull: Laser measurement Type: general – SubjectFull: Material erosion Type: general – SubjectFull: University of Tennessee (System) Type: general – SubjectFull: Thermal shielding Type: general – SubjectFull: Measuring instruments Type: general – SubjectFull: High-speed aeronautics Type: general – SubjectFull: Surface analysis Type: general – SubjectFull: Plasma torch Type: general Titles: – TitleFull: Development and validation of an in-situ recession measurement technique for ablative materials. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Trotsky, Mitchell – PersonEntity: Name: NameFull: Baccarella, Damiano IsPartOfRelationships: – BibEntity: Dates: – D: 11 M: 08 Text: 8/11/2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00223727 Numbering: – Type: volume Value: 58 – Type: issue Value: 32 Titles: – TitleFull: Journal of Physics D: Applied Physics Type: main |
| ResultId | 1 |
