Supersonic Mixing Enhancement Using Fin-Guided Fuel Injection

Aguilera, Camilo; Yu, Kenneth H.

doi:10.2514/1.b35685

Cited by 27 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

“…5 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, 6 struts, 7 ramps, 8 towers, 9 orifices, 10 deepening the understanding of liquid transverse jet atomization and breakup in the supersonic flow fields. Through experiments and numerical methods, researchers have explored the flow and combustion characteristics of cavities with different structures in depth.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Peng,

Zhou,

et al. 2024

ACS Omega

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…In recent years, studies on devices called pylons and fins have been conducted. 3,4) Pylons and fins are designed for the purpose of increasing the penetration height of a fuel jet flow and reducing pressure loss due to interference between the boundary layer and the fuel jet flow.…”

Section: Introductionmentioning

confidence: 99%

Flow Field and Combustion Field Control Using Pylons Installed Upstream of a Cavity in Supersonic Flow

Hizawa

Yamaguchi

Murata

et al. 2020

Trans. Japan Soc. Aero. S Sci.

View full text Add to dashboard Cite

This study clarifies the flow field and flame structure of a cavity flameholder with pylons in a Mach 2.8 airflow. A burned hydrogen/air gas mixture, rich in fuel, was injected in supersonic combustion experiments because self-ignition of fuel is difficult in a mainstream with low enthalpy. Experimental data were collected using the shadowgraph method, direct photography of the flame, wall pressure measurement, and OH Planer Laser-induced Fluorescence (OH-PLIF) measurement. In addition, three-dimensional numerical simulation was conducted. When one pylon was installed upstream of the jet flow, the penetration height of the jet increased, and a flame was formed in the mainstream center. When two pylons were installed at the front edge of the cavity, the flow field inside the cavity differed depending on the distance between the pylon and jet flow. The ignition and combustion of the burned-gas were suppressed at a close distance between the pylon and jet flow. For a large distance between the pylon and jet flow, the ignition and combustion of the burned-gas was enhanced. When hydrogen was injected as the main fuel from the upstream of the cavity, ignition of the main fuel was successful only for a large distance between the pylon and jet flow.

show abstract

“…A lot of techniques have been proposed for enhancing supersonic mixing; e.g., enhancement using a ramp injector 4) , lobed strut 5) , pylon 6) , elliptical injector 7) , diamond shaped orifice 8) , shallow-tail cavity 9) , wavy-wall 10) , fin-guided fuel injection 11) , wall mounted cavity 12)13)14) , a multi-sided wheel within the injector 15) , and so on.…”

Section: Introductionmentioning

confidence: 99%

Steady-state Analysis of Supersonic Mixing Enhanced by a Three-dimensional Cavity Flow

et al. 2017

View full text Add to dashboard Cite

The supersonic mixing field induced by a novel wall-mounted cavity having a three-dimensional shape is investigated computationally. In the computation, the Reynolds-averaged Navier-Stokes (RANS) equations are solved to obtain the steady state solution. The resulting pattern of limiting streamlines is compared with the previous result of oil-flow surface visualization. The comparison shows that the pattern of limiting streamlines agrees well with the oil flow pattern not only inside the cavity but also around the injector. The computational jet-penetration heights are also compared with the experimental heights measured previously. The comparison shows that both heights agree well near the injector. Such agreements imply that the flows in the cavity and around the injector can be reproduced well by the present numerical simulation. The detailed flow structure is investigated using the computational results. It is found from the results that a vortex having a three-dimensional shape is produced in the cavity and that the shear-layer spanning the cavity deflects upward near the central plane of the duct owing to the upward flows induced by the vortex. It is also found that owing to the upward shear-layer deflection the jet discharged from the injector is protected from the primary flow having large momentum. As a result, the jet penetrates highly into the primary flow.

show abstract

Supersonic Mixing Enhancement Using Fin-Guided Fuel Injection

Cited by 27 publications

References 30 publications

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

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

Flow Field and Combustion Field Control Using Pylons Installed Upstream of a Cavity in Supersonic Flow

Steady-state Analysis of Supersonic Mixing Enhanced by a Three-dimensional Cavity Flow

Contact Info

Product

Resources

About