Experimental and numerical heat transfer from vortex-injection interaction in scramjet flowfields

Article


Llobet, J.R., Basore, K.D., Gollan, R.J. and Jahn, I.H.. 2020. "Experimental and numerical heat transfer from vortex-injection interaction in scramjet flowfields ." Aeronautical Journal. 124 (1280), pp. 1545-1567. https://doi.org/10.1017/aer.2020.39
Article Title

Experimental and numerical heat transfer from vortex-injection interaction in scramjet flowfields

Article CategoryArticle
AuthorsLlobet, J.R., Basore, K.D., Gollan, R.J. and Jahn, I.H.
Journal TitleAeronautical Journal
Journal Citation124 (1280), pp. 1545-1567
Number of Pages23
YearOct 2020
PublisherCambridge University Press
Place of PublicationUnited Kingdom
ISSN0001-9240
2059-6464
Digital Object Identifier (DOI)https://doi.org/10.1017/aer.2020.39
Web Address (URL)https://www.cambridge.org/core/journals/aeronautical-journal/article/experimental-and-numerical-heat-transfer-from-vortexinjection-interaction-in-scramjet-flowfields/B0577C47BC3DE418CCCE51405282DDC3
Abstract

Air-breathing propulsion has the potential to decrease the cost per kilogram for access-to-space, while increasing the flexibility of available low earth orbits. However, to meet the performance requirements, fuel-air mixing inside of scramjet engines and thermal management still need to be improved.

An option to address these issues is to use intrinsically generated vortices from scramjet inlets to enhance fuel-air mixing further downstream, leading to shorter, less internal drag generating, and thus more efficient engines. Previous works have studied this vortex-injection interaction numerically, but validation was impractical due to lack of published experimental data. This paper extends upon these previous works by providing experimental data for a canonical geometry, obtained in the T4 Stalker Tube at Mach 8 flight conditions, and assesses the accuracy of numerical methodologies such as RANS CFD to predict the vortex-injection interaction.

Focus is placed on understanding the ability of the numerical methodology to replicate the most important aspects of the vortex-injection interaction. Results show overall good agreement between the numerical and experimental results, as all major features are captured. However, limitations are encountered, especially due to a localised region of over predicted heat flux.

KeywordsScramjet; Injection; Vortex; Heat Transfer; Mixing
ANZSRC Field of Research 2020400106. Hypersonic propulsion and hypersonic aerothermodynamics
4012. Fluid mechanics and thermal engineering
Byline AffiliationsUniversity of Queensland
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