Influence of Momentum Flux Ratio on Elliptical Liquid Jet Atomization in Supersonic Cross-Flow
Research Paper Analysis#Fluid Dynamics, Atomization, Supersonic Flow🔬 Research|Analyzed: Jan 3, 2026 18:56•
Published: Dec 29, 2025 10:42
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This paper investigates the impact of the momentum flux ratio (J) on the breakup mechanism, shock structures, and unsteady interactions of elliptical liquid jets in a supersonic cross-flow. The study builds upon previous research by examining how varying J affects atomization across different orifice aspect ratios (AR). The findings are crucial for understanding and potentially optimizing fuel injection processes in supersonic combustion applications.
Key Takeaways
- •The momentum flux ratio (J) significantly influences the atomization mechanism of elliptical liquid jets in a supersonic cross-flow.
- •Lower J values lead to increased unsteadiness and larger Rayleigh-Taylor waves.
- •Higher J values result in decreased unsteadiness and smaller, more regular Rayleigh-Taylor waves.
- •Kelvin-Helmholtz instabilities (KHI) are the primary atomization mechanism on lateral surfaces for AR = 0.3 and 1, regardless of J.
- •The interaction of the liquid jet with the oncoming boundary layer streaks is a key source of unsteadiness at lower J values.
Reference / Citation
View Original"The study finds that lower J values lead to greater unsteadiness and larger Rayleigh-Taylor waves, while higher J values result in decreased unsteadiness and smaller, more regular Rayleigh-Taylor waves."