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  • Open Access


    A Numerical Study on Supersonic Combustion Optimization Based on the Streamwise Vortex-Couple Method

    Hao Tian, Yongkang Zheng*, Hanxin Zhang

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 207-222, 2023, DOI:10.32604/fdmp.2023.019790

    Abstract In this paper, some typical methods to promote mixing in supersonic combustion are reviewed, and the fluid-dynamic mechanism underpinning the development of the supersonic shear layer in the presence of a streamwise vortex is analyzed through computational fluid dynamics. It is proven that the streamwise vortex-couple method is an excellent approach to enhance mixing. A specific combustor design is proposed accordingly. More >

  • Open Access


    Numerical Application of the Flamelet Model to Supersonic Turbulent Combustion

    Yongkang Zheng1, Qinxue Jiang1,*, Hao Tian1, Youda Ye1, Jingying Wang2

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.4, pp. 957-971, 2022, DOI:10.32604/fdmp.2022.019048

    Abstract In this study, the flow field structure inside a scramjet combustor is numerically simulated using the flamelet/progress variable model. Slope injection is considered, with fuel mixing enhanced by means of a streamwise vortex. The flow field structure and combustion characteristics are analyzed under different conditions. Attention is also paid to the identification of the mechanisms that keep combustion stable and support enhanced mixing. The overall performances of the combustion chamber are discussed. More >

  • Open Access


    Numerical Investigations on the Impact of Turbulent Prandtl Number and Schmidt Number on Supersonic Combustion

    Yongkang Zheng1,2,*, Chao Yan1

    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 637-650, 2020, DOI:10.32604/fdmp.2020.09694

    Abstract The flow field inside the combustor of a scramjet is highly complicated and the related turbulent Prandtl and Schmidt numbers have a significant impact on the effective numerical prediction of such dynamics. As in many cases researchers set these parameters on the basis of purely empirical laws, assessing their impact (via parametric numerical simulations) is a subject of great importance. In the present work, in particular, two test cases with different characteristics are selected for further evaluation of the role played by these non-dimensional numbers: Burrows-Kurkov case and DLR case. The numerical results indicate that More >

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