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Brakmann, Robin and Schroll, Michael and Willert, Christian and Carvalho, Francisco (2025) Heat-Transfer Enhancement in Impingement Cooling. In: ThermoXchange. ThermoXchange 2025, 2025-05-27 - 2025-05-28, Göttingen, Deutschland. (Unpublished)
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Abstract
Impingement cooling is a key technology for turbomachinery thermal management. This presentation investigates a modification of the impingement hole plate using an “ArcConic” U-shaped turbulator to guide cross-flow and reinforce the jet. Based on >100 RANS-SST/TRACE design variations, the best configurations achieve >16% increase in average Nusselt number with an associated pressure-loss increase of about 6%. High-speed PIV results indicate reduced jet deflection and a more homogeneous heat-transfer distribution. Manufacturability aspects for selective laser melting (SLM) of Inconel alloys are discussed.
| Item URL in elib: | https://elib.dlr.de/220739/ | ||||||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
| Title: | Heat-Transfer Enhancement in Impingement Cooling | ||||||||||||||||||||
| Authors: |
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| Date: | May 2025 | ||||||||||||||||||||
| Journal or Publication Title: | ThermoXchange | ||||||||||||||||||||
| Refereed publication: | No | ||||||||||||||||||||
| Open Access: | No | ||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||||||
| Editors: |
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| Status: | Unpublished | ||||||||||||||||||||
| Keywords: | Impingement cooling, heat transfer enhancement, ArcConic, U-shaped turbulator, cross-flow, CFD, RANS-SST, TRACE, PIV, gas turbine cooling, additive manufacturing, SLM | ||||||||||||||||||||
| Event Title: | ThermoXchange 2025 | ||||||||||||||||||||
| Event Location: | Göttingen, Deutschland | ||||||||||||||||||||
| Event Type: | Other | ||||||||||||||||||||
| Event Start Date: | 27 May 2025 | ||||||||||||||||||||
| Event End Date: | 28 May 2025 | ||||||||||||||||||||
| Organizer: | AT-TUR /AT-TWK | ||||||||||||||||||||
| HGF - Research field: | Energy | ||||||||||||||||||||
| HGF - Program: | Materials and Technologies for the Energy Transition | ||||||||||||||||||||
| HGF - Program Themes: | High-Temperature Thermal Technologies | ||||||||||||||||||||
| DLR - Research area: | Energy | ||||||||||||||||||||
| DLR - Program: | E VS - Combustion Systems | ||||||||||||||||||||
| DLR - Research theme (Project): | E - Gas Turbine | ||||||||||||||||||||
| Location: | Göttingen | ||||||||||||||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Turbine Institute of Propulsion Technology > Engine Measurement Systems Institute of Propulsion Technology > Numerical Methodes | ||||||||||||||||||||
| Deposited By: | Brakmann, Robin | ||||||||||||||||||||
| Deposited On: | 16 Dec 2025 13:12 | ||||||||||||||||||||
| Last Modified: | 16 Dec 2025 13:12 |
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