An Experimental Investigation of a Thermal Compression Scramjet with OH Imaging
Paper
Vanyai, Tristan, Bricalli, Mathew, Sopek, Tamara, Brieschenk, Stefan and McIntyre, Timothy J.. 2015. "An Experimental Investigation of a Thermal Compression Scramjet with OH Imaging." 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference (AIAA 2015). Glasgow, Scotland 06 - 09 Jul 2015 Reston, United States. https://doi.org/10.2514/6.2015-3610
| Paper/Presentation Title | An Experimental Investigation of a Thermal Compression Scramjet with OH Imaging |
|---|---|
| Presentation Type | Paper |
| Authors | Vanyai, Tristan (Author), Bricalli, Mathew (Author), Sopek, Tamara (Author), Brieschenk, Stefan (Author) and McIntyre, Timothy J. (Author) |
| Journal or Proceedings Title | Proceedings of the 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference (AIAA 2015) |
| ERA Conference ID | 60012 |
| Number of Pages | 12 |
| Year | 2015 |
| Place of Publication | Reston, United States |
| Digital Object Identifier (DOI) | https://doi.org/10.2514/6.2015-3610 |
| Web Address (URL) of Paper | https://arc.aiaa.org/doi/10.2514/6.2015-3610 |
| Conference/Event | 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference (AIAA 2015) |
| AIAA International Space Planes and Hypersonic Systems and Technologies Conference | |
| Event Details | 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference (AIAA 2015) Parent AIAA International Space Planes and Hypersonic Systems and Technologies Conference Delivery In person Event Date 06 to end of 09 Jul 2015 Event Location Glasgow, Scotland Event Web Address (URL) |
| Event Details | AIAA International Space Planes and Hypersonic Systems and Technologies Conference |
| Abstract | Scramjet engines must be designed to operate over a range of Mach numbers. In order to maintain robust starting characteristics at low freestream Mach numbers, the inlet contraction ratio must be minimized, reducing performance at high Mach numbers. The technique of thermal compression can be used to maintain robust combustion at low mean pressure and temperature, improving the performance of low inlet contraction ratio engines over a range of Mach numbers. This paper examines a scramjet engine with a three-dimensional inlet that induces spanwise gradients of pressure and temperature, producing high inlet compression on one side and low inlet compression on the other. The effect of combustion in each half on pressure throughout the entire flowfield is examined by suppressing combustion on either half of the combustor through injecting either a combusting fuel, hydrogen, or a non-combusting replacement, helium. Two optical techniques are used to examine how the concentration of the OH radical varies throughout the combustor. Images of OH* Chemiluminescence and OH Planar Laser-Induced Fluorescence (PLIF) map the concentration and production of OH radicals indicating chemical activity throughout the combustion process. The thermal compression effect is isolated, and is shown to increase combustion-induced pressure rise in a scramjet engine. |
| Keywords | Chemical activities; Combustion pro-cess; Experimental investigations; Freestream mach number; Oh planar laser induced fluorescences; Pressure and temperature; Starting characteristic; 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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