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• W2313451229 abstract "Acquiring experimental data on hydrogen/oxygen coaxial elements under realistic conditions (super-critical pressure, liquid oxygen, high momentum flux ratios) is di cult and the injection of hydrogen at cryogenic temperature makes it even more complex. Not only are there additional cooling requirements but the same injector that provides realistic momentum/velocity ratios with room-temperature hydrogen will produce very small momentum/velocity ratios with a cryogenic hydrogen injection at the same flow rate. The reduced fuel injection temperature has been shown to change the combustion characteristics of the chamber, a phenomenon that is not fully understood yet. Here, a single-element liquid-oxygen gaseous-hydrogen shear-coaxial injector is studied with hydrogen injected at 50 K. Performing three-dimensional simulations of these type of configurations is very costly due to the dimensions of the chamber, the range of scales and also to the diversity of physical phenomena involved, such as complex thermodynamics at elevated pressure. This work investigates the use of two-dimensional models of the real three-dimensional configuration to perform parametric studies. The main advantage of the two-dimensional simulations compared to the full chamber is the reduction in computational cost. Although the flow features observed with the 2D model are not identical to the ones found in the three-dimensional case, some common characteristics can be reproduced. This paper highlights the similarity and di↵erences between two-dimensional and three-dimensional cases and identifies which issues can be studied using two-dimensional simulations." @default.
• W2313451229 created "2016-06-24" @default.
• W2313451229 creator A5023691836 @default.
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• W2313451229 date "2013-01-05" @default.
• W2313451229 modified "2023-09-25" @default.
• W2313451229 title "Large-Eddy simulation of a reactive shear coaxial injector configuration" @default.
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• W2313451229 doi "https://doi.org/10.2514/6.2013-563" @default.
• W2313451229 hasPublicationYear "2013" @default.
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