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Characterisation of Wake-Region Optical Emissions From an Ablative Hypersonic Glide Vehicle

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dc.contributor.authorKnight, J.
dc.contributor.authorKildare, J.
dc.contributor.authorZander, F.
dc.contributor.authorLaw, Y.W.
dc.contributor.authorEvans, M.
dc.contributor.conferenceScience and Technology Forum and Exposition (AIAA) (12 Jan 2026 - 16 Jan 2026 : Orlando, Florida)
dc.date.issued2026
dc.description.abstractThe effect of ablation on the structure and chemical composition of the wake behind the HIFiRE-5 vehicle at Mach 12.6 and 30 km altitude is examined to enhance understanding of possible wake-region emission spectra. A coupled flow-radiation-ablation numerical model is developed to resolve wake-region translational and vibro-electronic temperatures and the number densities of both air and ablation-derived species. For an ablating vehicle, carbon monoxide (CO) and carbon dioxide (CO₂) are identified as the major ablation products entering the wake, while wake-region nitric oxide (NO) is also enhanced relative to the non-ablating vehicle. The developed wake exhibits two apparent neck positions, driven by forebody boundary-layer crossflow, producing localized peaks in translational and vibro-electronic temperatures in the wake.
dc.description.statementofresponsibilityJarrad M. Knight, Jordan Kildare, Fabian Zander, Yee Wei Law and Michael J. Evans
dc.identifier.citationProceedings of the AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum, 2026, pp.1-18
dc.identifier.doi10.2514/6.2026-2509
dc.identifier.isbn9781624107658
dc.identifier.orcidKnight, J. [0009-0001-2050-3188]
dc.identifier.orcidKildare, J. [0000-0002-2380-5755]
dc.identifier.orcidLaw, Y.W. [0000-0002-5665-0980]
dc.identifier.orcidEvans, M. [0000-0003-1004-5168]
dc.identifier.urihttps://hdl.handle.net/2440/148922
dc.language.isoen
dc.publisherAmerican Institute of Aeronautics and Astronautics
dc.publisher.placeUnited States
dc.rightsCopyright © 2026 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
dc.source.urihttps://doi.org/10.2514/6.2026-2509
dc.subjecthypersonic glide vehicle
dc.subjectwake-region emission spectra
dc.titleCharacterisation of Wake-Region Optical Emissions From an Ablative Hypersonic Glide Vehicle
dc.typeConference paper
pubs.publication-statusPublished online

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