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- W1997451672 abstract "ABSTRACT This paper extends past analyses of liquid-oxygen-hydrogen flames at supercritical pressure by providing quantitative results that characterize multicomponent diffusion processes in the flame zone of a shear-coaxial injector element. High-fidelity simulations, using both the large-eddy-simulation and direct-numerical-simulation techniques, have been performed using detailed treatments of thermodynamic, transport and chemical kinetics. Results are presented for a condition where oxygen is injected in a cryogenic state, at a subcritical temperature and supercritical pressure, and hydrogen is injected in a supercritical state. This condition has significant technical relevance in liquid-rocket engines but is not well understood. For this situation a diffusion dominated mode of combustion occurs in the presence of exceedingly large thermophysical property gradients. The flame anchors itself in the interfacial region of high shear that exists between the liquid-oxygen core and the annular hydrogen jet. Intense property gradients approach the behavior of a contact discontinuity in this region. Significant real-gas effects and transport anomalies coexist locally in colder regions of the flow, with ideal gas and transport processes occurring within the flame zone. The current work provides a detailed analysis focused on the effects and relative contributions of various diffusion mechanisms and the net coupled effect of these processes on the observed mode of combustion." @default.
- W1997451672 created "2016-06-24" @default.
- W1997451672 creator A5080510531 @default.
- W1997451672 date "2006-01-01" @default.
- W1997451672 modified "2023-10-13" @default.
- W1997451672 title "MIXING AND COMBUSTION OF CRYOGENIC OXYGEN-HYDROGEN SHEAR-COAXIAL JET FLAMES AT SUPERCRITICAL PRESSURE" @default.
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- W1997451672 doi "https://doi.org/10.1080/00102200500325322" @default.
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