Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies
This study developed a non-destructive testing (NDT) method using infrared thermography to inspect tubes with holes and slots made by electro-erosion and additive manufacturing. CO<sub>2</sub> was used as a tracer gas to verify the opening and evaluate the flow shape from the holes and s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-02-01
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| Series: | Engineering Proceedings |
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| Online Access: | https://www.mdpi.com/2673-4591/85/1/15 |
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| author | Ester D’Accardi Luca Ammannato Alessandra Giannasi Marco Pieri Giuseppe Masciopinto Francesco Ancona Giovanni Santonicola Davide Palumbo Umberto Galietti |
| author_facet | Ester D’Accardi Luca Ammannato Alessandra Giannasi Marco Pieri Giuseppe Masciopinto Francesco Ancona Giovanni Santonicola Davide Palumbo Umberto Galietti |
| author_sort | Ester D’Accardi |
| collection | DOAJ |
| description | This study developed a non-destructive testing (NDT) method using infrared thermography to inspect tubes with holes and slots made by electro-erosion and additive manufacturing. CO<sub>2</sub> was used as a tracer gas to verify the opening and evaluate the flow shape from the holes and slots. To improve the signal contrast, a controlled hot background was used as a reference, and infrared cameras monitored the thermal response to detect flow variations caused by different geometries. The tests included different diameters, pitches, and aspect ratios, comparing results between additive manufacturing and electro-erosion under various conditions. Moreover, a preliminary setup using compressed air and inductive heating was developed to assess hole openings by cooling the piece, aiming to eliminate CO<sub>2</sub> use. The comparison of results, the post-processing analysis of quantitative indices, and specific thermal features enabled a non-destructive evaluation of the holes by using different technologies, providing an assessment of the opening conditions, outlet, geometry, and flow shape. |
| format | Article |
| id | doaj-art-8f7c50b1e21648cfa69a93717a086d0d |
| institution | Kabale University |
| issn | 2673-4591 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Engineering Proceedings |
| spelling | doaj-art-8f7c50b1e21648cfa69a93717a086d0d2025-08-20T03:27:18ZengMDPI AGEngineering Proceedings2673-45912025-02-018511510.3390/engproc2025085015Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative TechnologiesEster D’Accardi0Luca Ammannato1Alessandra Giannasi2Marco Pieri3Giuseppe Masciopinto4Francesco Ancona5Giovanni Santonicola6Davide Palumbo7Umberto Galietti8Dipartimento di Matematica, Meccanica e Management (DMMM), Politecnico di Bari, Via Edoardo Orabona 4, 70125 Bari, ItalyBaker Hughes (BH), Piazza Enrico Mattei, 50127 Firenze, ItalyBaker Hughes (BH), Piazza Enrico Mattei, 50127 Firenze, ItalyBaker Hughes (BH), Piazza Enrico Mattei, 50127 Firenze, ItalyDipartimento di Matematica, Meccanica e Management (DMMM), Politecnico di Bari, Via Edoardo Orabona 4, 70125 Bari, ItalyDiagnostic Engineering Solutions (DES), Via della Costituente 29, 70125 Bari, ItalyDiagnostic Engineering Solutions (DES), Via della Costituente 29, 70125 Bari, ItalyDipartimento di Matematica, Meccanica e Management (DMMM), Politecnico di Bari, Via Edoardo Orabona 4, 70125 Bari, ItalyDipartimento di Matematica, Meccanica e Management (DMMM), Politecnico di Bari, Via Edoardo Orabona 4, 70125 Bari, ItalyThis study developed a non-destructive testing (NDT) method using infrared thermography to inspect tubes with holes and slots made by electro-erosion and additive manufacturing. CO<sub>2</sub> was used as a tracer gas to verify the opening and evaluate the flow shape from the holes and slots. To improve the signal contrast, a controlled hot background was used as a reference, and infrared cameras monitored the thermal response to detect flow variations caused by different geometries. The tests included different diameters, pitches, and aspect ratios, comparing results between additive manufacturing and electro-erosion under various conditions. Moreover, a preliminary setup using compressed air and inductive heating was developed to assess hole openings by cooling the piece, aiming to eliminate CO<sub>2</sub> use. The comparison of results, the post-processing analysis of quantitative indices, and specific thermal features enabled a non-destructive evaluation of the holes by using different technologies, providing an assessment of the opening conditions, outlet, geometry, and flow shape.https://www.mdpi.com/2673-4591/85/1/15infrared thermographyCO<sub>2</sub> flowcompressed airadditive manufacturing |
| spellingShingle | Ester D’Accardi Luca Ammannato Alessandra Giannasi Marco Pieri Giuseppe Masciopinto Francesco Ancona Giovanni Santonicola Davide Palumbo Umberto Galietti Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies Engineering Proceedings infrared thermography CO<sub>2</sub> flow compressed air additive manufacturing |
| title | Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies |
| title_full | Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies |
| title_fullStr | Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies |
| title_full_unstemmed | Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies |
| title_short | Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies |
| title_sort | infrared thermography for non destructive testing of cooling hole integrity and flow evaluation in specimens made with innovative technologies |
| topic | infrared thermography CO<sub>2</sub> flow compressed air additive manufacturing |
| url | https://www.mdpi.com/2673-4591/85/1/15 |
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