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- W4309771594 abstract "Supersonic combustion is a complex phenomenon with multi-physical coupling, and the thermal-acoustic coupling under supersonic inflow is also a matter of concern. In this work, Large Eddy Simulation of a strut-stabilized model scramjet is performed with dynamic thickened flame combustion model, and an efficiency function accounting for both, wrinkling loss due to flame thickening and turbulence/flame interaction. The finite-rate chemistry model and a skeletal hydrogen reaction mechanism with 9 species and 27 reactions are adopted. The method allows to predict the complex physical in supersonic reactive flow efficiently and the results are in good agreement with experimental. A comprehensive analysis of the Damköhler number, modified flame index and heat release rate is conducted to investigate the flame structure under shock-waves condition, and the difference between heat release rate and reaction rate distributions in Mach number space is also observed. The oscillation characteristics in the strut-based scramjet is discussed mode by mode using the Proper Orthogonal Decomposition approach, and the results identify a mode at 4.997 kHz, in which the thermal-acoustic coupling found, while the stronger modes are the results of multiple factors, including auto-ignition, vortexes shedding and the resulting shock-waves oscillation." @default.
- W4309771594 created "2022-11-29" @default.
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- W4309771594 date "2023-01-01" @default.
- W4309771594 modified "2023-10-15" @default.
- W4309771594 title "Large eddy simulation of flame and thermal-acoustic characteristics in a strut-based scramjet with dynamic thickened flame model" @default.
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- W4309771594 doi "https://doi.org/10.1016/j.csite.2022.102560" @default.
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