Effects of lifted fuel injection using an upstream ramp of a cavity on scramjet combustion

Dan, Yu; Sheng, Zhi-qiang; Zhang, Lan; Lu, Liang-ze

doi:10.1016/j.ast.2023.108651

Cited by 6 publications

(1 citation statement)

References 58 publications

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“…Therefore, further research is needed to understand the interaction mechanism between gas and jet in cold-flow supersonic engines, identify the key factors influencing fuel jet breakup and atomization, optimize flame stabilization devices, and meet the requirements of practical engineering. To improve the performance of scramjet engines, researchers have conducted extensive studies on cavities, struts, ramps, towers, orifices, and their combinations. Particularly, they emphasize research on the characteristics of transverse liquid jets in supersonic airflow, deepening the understanding of liquid transverse jet atomization and breakup in the supersonic flow fields.…”

Section: Introductionmentioning

confidence: 99%

Effect of Kerosene Dual-Jet Spacing on the Mixing and Combustion Characteristics of a Scramjet Combustor

Peng,

Zhou,

et al. 2024

ACS Omega

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As the core of a hypersonic propulsion system, the effective mixing efficiency of fuel and air in a supersonic combustor is crucial for its performance. This study focuses on a cold supersonic flow and employs computational fluid dynamics (CFD) techniques combined with Euler−Lagrange method's discretephase model (DPM) for multiphase flows, K−H and R−T (Kelvin−Helmholtz and Rayleigh−Taylor) mixing and atomization models, turbulence models, and surface evaporation models to investigate the injection, atomization, and mixing characteristics of kerosene in supersonic airflow. In order to enhance the mixing efficiency between kerosene and air while reducing flow losses, this study examines a staggered dual-jet injection scheme, with the dual jets arranged at the center of the cavity and having a dual-jet spacing of 10 and 20 mm, respectively. Starting from the interaction mechanism between jets, the impact of different staggered dualjet spacings on the kerosene jet penetration height, span expansion area, angle of the shock wave, and Sauter mean diameter distribution was analyzed. The results show that a short dual-jet spacing (10 mm) leads to greater penetration height, wider span expansion, and a larger angle of the shock wave. When the dual-jet spacing is shorter, the interaction between the fuel jet and the cavity shear layer is stronger, resulting in an improved fuel mixing efficiency. The achievements of this study are consistent with previous experimental measurements and the literature, demonstrating a strong theoretical foundation for optimizing the design of hypersonic engines by deepening the understanding of the fundamental atomization mechanisms of kerosene jets in cold-state supersonic flows. Moreover, these results hold practical significance in improving the efficiency of kerosene combustion and enhancing the performance of flame stabilization devices.

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