L773:1270 9638
Sökning: L773:1270 9638 > (2020-2024) > Large Eddy Simulati...
LIBRIS Formathandbok (Information om MARC21)
| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03948naa a2200337 4500 | |
| 001 | oai:lup.lub.lu.se:70166d97-a833-4848-8a3a-e43935cf8e96 | |
| 003 | SwePub | |
| 008 | 231024s2023 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://lup.lub.lu.se/record/70166d97-a833-4848-8a3a-e43935cf8e962 URI |
| 024 | 7 | a https://doi.org/10.1016/j.ast.2023.1085032 DOI |
| 040 | a (SwePub)lu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Fureby, Christeru Lund University,Lunds universitet,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Energiomställningen,LTH profilområden,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,LTH Profile areas,Faculty of Engineering, LTH4 aut0 (Swepub:lu)ch1708fu |
| 245 | 1 0 | a Large Eddy Simulation of cavity stabilized ramjet combustion |
| 264 | 1 | c 2023 |
| 520 | a In this study we use finite rate chemistry Large Eddy Simulation (LES) to examine flow, injection, mixing, self-ignition and turbulent combustion in a dual-mode ramjet combustor with a cavity flameholder. The target case is the dual-mode ramjet combustor studied experimentally by Micka & Driscoll in a series of publications under different operating conditions characterized by varying air stagnation temperatures, T0, and fueled with hydrogen or hydrogen-ethylene blends. Here, only hydrogen fuel is considered. Three skeletal and comprehensive chemical reaction mechanisms are used to evaluate the influence of the reaction mechanism. Based on comparisons with ignition, laminar flame, and dual-mode ramjet combustor experiments the Z22 mechanism is found superior to the D7 and J20 mechanisms, which is then used throughout this study. For the ramjet experiments, two stabilization modes were reported: cavity-stabilized combustion at low T0 and jet-wake-stabilized combustion at high T0. For in-between values of T0, combustion oscillates between these modes. The LES results using the Z22 reaction mechanism are in good agreement with the experimental data: cavity-stabilized combustion is observed for low T0, and for this case combustion anchors at the leading-edge of the cavity. For high T0 jet-wake-stabilized combustion occurs in the near-wake of the fuel-plume. Between these two modes, combustion oscillates between modes that can be roughly identified as jet-wake and cavity stabilized. The LES predictions also reveal details about high-frequency oscillations (∼1 kHz) that are observed in particular for low and intermediate T0. The H2-air mixture appears to burn as an auto-ignition assisted premixed flame in the cavity-stabilized case, and as a diffusion-flame in the jet-wake stabilized case, whereas for the in-between cases, the burning modes changes accordingly. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng |
| 653 | a Cavity stabilized ramjet combustion | |
| 653 | a Combustion modes | |
| 653 | a LES | |
| 653 | a Unsteady supersonic combustion | |
| 700 | 1 | a Nilsson, Thommieu Lund University,Lunds universitet,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)ener-ten |
| 710 | 2 | a Värmeöverföringb Institutionen för energivetenskaper4 org |
| 773 | 0 | t Aerospace Science and Technologyg 141q 141x 1270-9638 |
| 856 | 4 | u http://dx.doi.org/10.1016/j.ast.2023.108503x freey FULLTEXT |
| 856 | 4 8 | u https://lup.lub.lu.se/record/70166d97-a833-4848-8a3a-e43935cf8e96 |
| 856 | 4 8 | u https://doi.org/10.1016/j.ast.2023.108503 |
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