Thermal compression effects within a fundamental, hydrogen-fuelled scramjet
Article
Vanyai, Tristan, Brieschenk, Stefan, Bricalli, Mathew, Sopek, Tamara and McIntyre, Timothy J.. 2021. "Thermal compression effects within a fundamental, hydrogen-fuelled scramjet." Aerospace Science and Technology. 110, pp. 1-16. https://doi.org/10.1016/j.ast.2021.106499
| Article Title | Thermal compression effects within a fundamental, hydrogen-fuelled scramjet |
|---|---|
| ERA Journal ID | 3574 |
| Article Category | Article |
| Authors | Vanyai, Tristan (Author), Brieschenk, Stefan (Author), Bricalli, Mathew (Author), Sopek, Tamara (Author) and McIntyre, Timothy J. (Author) |
| Journal Title | Aerospace Science and Technology |
| Journal Citation | 110, pp. 1-16 |
| Article Number | 106499 |
| Number of Pages | 16 |
| Year | 2021 |
| Place of Publication | France |
| ISSN | 1270-9638 |
| 1626-3219 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.ast.2021.106499 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S1270963821000110 |
| Abstract | The impact of thermal compression on combustion has been studied experimentally in a hydrogen-fuelled, non-uniform scramjet flowpath. The experimental model consisted of a three-dimensional inlet, a constant area rectangular combustor, and a single-ramp expansion nozzle, all having a constant width, and was tested at an equivalent Mach 10 flight condition with 58 kPa dynamic pressure. Combustion was suppressed in different regions of the combustor by injecting helium as a replacement for hydrogen fuel in either spanwise half of the engine. Thermal compression effects increased the combustion-induced pressure rise by across the majority of the combustor for an equivalence ratio of 0.8, however a shock-related artefact dominated similar measurements for a case with an equivalence ratio of 1.0. Over a smaller region at the end of the combustor, the combustion-induced pressure rise was increased by and for equivalence ratios of 0.8 and 1.0, respectively. Time-integrated OH emission signals increased by 19% and 31%, whilst time-resolved signals increased by 54% and 35%, for equivalence ratios of 0.8 and 1.0, respectively. This study presents the first experimental evidence of thermal compression directly increasing combustion-induced pressure rise in a scramjet engine. |
| Keywords | Dynamic pressures; Equivalence ratios; Experimental evidence; Experimental modeling; Flight conditions; Hydrogen-fuelled; Scramjet engines; Thermal compressions |
| ANZSRC Field of Research 2020 | 400106. Hypersonic propulsion and hypersonic aerothermodynamics |
| 510299. Atomic, molecular and optical physics not elsewhere classified | |
| 401205. Experimental methods in fluid flow, heat and mass transfer | |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | University of Queensland |
| Institution of Origin | University of Southern Queensland |
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