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Large-eddy simulation of kerosene spray combustion in a model scramjet chamber

By Man Zhang, Zhiwei Hu, Guoqiang He and Peijin Liu


Large-eddy simulation (LES) of kerosene spray combustion in a model supersonic combustor with cavity flame holder is carried out. Kerosene is injected through the ceiling of the cavity. The subgrid-scale (SGS) turbulence stress ensor is closed via the Smagorinsky’s eddyviscosity model, chemical source terms are modelled by a finite rate chemistry (FRC) model, and a four-step reduced kerosene combustion kinetic mechanism is adopted. The chamber wall<br/>pressure predicted from the LES is validated by experimental data reported in literature. The test case has a cavity length of 77mm and a depth of 8mm. After liquid kerosene is injected through the orifice, most of the droplets are loaded with recirculation fluid momentum inside the cavity. Due to lower velocity of the carrier fluid inside the cavity, sufficient atomization and evaporation take place during the process of droplet transportation, resulting in a rich fuel mixture of kerosene vapour accumulating inside the cavity. These rich fuel mixtures are mixed with fresh air by the approachmixing layer at the front of the cavity and are thus involved in burning accompanied with the approach boundary layer separation extending towards upstream. The combustion flame in the downstream impinges onto the rear wall of the cavity and is then reflected back to the front of the cavity. During the recirculation of hot flow, heat is compensated for evaporation of droplets. The circulation processes mentioned above provide an efficient flame-holding<br/>mechanism to stabilize the flame.Comparisons with results froma shorter length of cavity (cavity length of 45mm) show that, due to insufficient atomization and evaporation of the droplets in the short distance inside the cavity, parts of the droplets are carried out of the cavity through the<br/>boundary layer fluctuation and evaporated in the hot flame layer, thus resulting in incomplete air fuel mixing and worse combustion performance. The flow structures inside the cavity play an important role in the spray istribution, thus determining the combustion performance

Topics: TL
Year: 2010
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Provided by: e-Prints Soton
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    1. (2004). A century of ramjet propulsion technology evolution. doi
    2. (1933). A drag coefficient correlation.VDI Zeits.,
    3. A multiple-step overall kinetic mechanism for the oxidationofhydrocarbons.Combust.Sci.Technol.,1981,25(5),
    4. (1984). Chemical kinetic modelingofhydrocarboncombustion.Progr.EnergyCombus. Sci.,
    5. Chemistry of hydrocarbon combustion, doi
    6. Comparison of flamelet and finite rate chemistryLESforpremixedturbulentcombustion.AIAApaper
    7. (2005). Computational fluid dynamics: principles and Q5 applications, 2nd edition, doi
    8. Computations of soot and NOX emissions from gas turbine combustors.
    9. Critical evaluation of jet-a spraycombustionusingpropanechemicalkineticsingas turbine combustion simulated by KIVA-II. doi
    10. (1997). Diesel spray modelling: a review. doi
    11. (2001). DNS and LES of turbulence–combustion Q6 interactions. In Modern simulation strategies for turbulent flow (Eds
    12. (2006). Filtered density function for subgrid scale modeling of turbulent combustion. doi
    13. Flame characteristics in supersonic combustor with hydrogen injection upstream of cavity flameholder. doi
    14. (1997). G.,and Coakley,T.J.Turbulence modeling validation. doi
    15. (1998). Gas turbine combustion, doi
    16. Hypersonic airbreathing propulsion,
    17. (2001). Investigation of kerosene combustion characteristics with pilot hydrogen in model supersonic combustors. doi
    18. (2002). Investigation of liquid hydrocarbon combustion in supersonic flow using effervescent atomization. AIAA paper 02-4279, doi
    19. (2005). Kinetic models of combustion of kerosene and its components. doi
    20. (2005). Large eddy simulation of turbulent combustion systems. doi
    21. (2008). Large eddy simulation of turbulent reacting flow. Prog. Aerospace Sci., doi
    22. (2008). Large eddy simulations of turbulent reacting Q7 flows in real burners: the status and challenges. doi
    23. (1997). Large-eddy simulation of high-speed turbulent diffusion flames with detailed chemistry. doi
    24. (2004). LES of supersonic combustion of hydrocarbon spray in a SCRAMJET. AIAA paper doi
    25. (1997). Liquid jet atomization and droplet breakup modeling of non-evaporating diesel fuel sprays. SAE Trans., doi
    26. (2009). Mixing and combustion characteristicsofkeroseneinamodelsupersoniccombustor.
    27. (2003). Modeling engine spray and combustion pro- Q5 cesses, doi
    28. Modeling of high speed reacting flows: established practices and future challenges. doi
    29. Numerical investigation of various atomiza- Q8 tion models in the modeling of a spray flame.
    30. (2000). Numerical simulation of Q5 reactive flow, 2nd edition, doi
    31. (2005). Overview with results and lessons learned of the X-43A Mach 10 flight. doi
    32. Pitsch,H.Unsteadyflameletmodelingofdifferentialdiffusion in turbulent jet diffusion flames. doi
    33. (2005). Principles of combustion, 2nd edition,
    34. (2007). Simulation of spray combustion in a lean-direct injection combustor. doi
    35. (2008). Simulation of spray–turbulence– flame interactions in a lean direct injection combustor. doi
    36. Subgrid combus- Q8 tion modeling for the next generation national combustion code.
    37. (2005). Subgrid combustion modeling of 3-D premixed flames in the thin-reaction-zone regime. doi
    38. (2006). Subgrid modeling for simulation of spray combustion in large-scale combustors. doi
    39. Technology roadmap for dualmode scramjet propulsion to support space-access doi
    40. (2006). The ignition, oxidation, and combustion of kerosene: a review of experimental and kinetic modeling. Progr. Energy Combus. Sci., doi
    41. (2004). Three facets of turbulent combustion modeling: DNS of premixed V-flame, LES of lifted nonpremixed flame and RANS of jet-flame. doi
    42. (2008). Toward the use of large eddy simulation in engineering. doi
    43. (2000). Transport processes in chemically reacting Q5 flow systems, doi
    44. (2006). Turbulence modeling for CFD, 3rd edition,
    45. (2004). Turbulence: an introduction for scientists Q5 and engineers,
    46. (2002). Turbulent combustion modeling. doi
    47. (2000). Turbulent flows, doi
    48. (2001). Upper bounds on the flight speed of hydrocarbon-fueled scramjet-powered vehicles. doi

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