Geometrical Effects on the Fluid Dynamics of an Open-End Swirl Injector

Fu, Qiuyun; Yang, Lijun; Qu, Yuanyuan; Gu, Bin

doi:10.2514/1.b34078

Cited by 25 publications

(2 citation statements)

References 14 publications

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“…If the dynamic characteristics of injectors can be designed well, the pressure fluctuation can be attenuated in the transfer process, or the phase of pressure fluctuation can be adjusted to avoid being in phase with the heat release to arouse combustion instability. Fu et al 17,18 made an attempt to investigate the dynamics of open-end swirl injectors, which determined whether a flow rate variation is caused by pressure fluctuation in the feed line and to investigate its transfer function and phase shift. However, the dynamic characteristics of the open-end swirl injectors caused by the variation in boundary conditions downstream of the injector (varied density ratio of the chamber gases to the liquid propellant) are not investigated.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the internal flow of swirl atomizer under ambient pressure

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper presents the simulation study of internal flow of open-end swirl injectors under steady and oscillating ambient pressures. A two-dimensional swirl axisymmetric model based on the volume of fluid method was developed to study the effect of ambient pressure on the internal flow of open-end swirl injectors. The response of injector flow to the ambient pressure oscillation was investigated by superimposing periodical oscillation of ambient pressure at the spout outlet. The results show that the variation of ambient pressure affects the liquid phase volumetric fraction within the gas-liquid shear layer. The spray angle near the wall remains constant independent of the ambient pressure. The velocity distribution on different axial sections rarely varies with ambient pressure. When the ambient pressure oscillated, the ambient pressure oscillation would cause the flow rate oscillation at the spout. The phase delay between the flow rate oscillation at spout and the ambient pressure oscillation is proportional to the oscillation frequency.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of the internal flow of swirl atomizer under ambient pressure

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Chad J. Eberhart et al [7] researched the effect of chamber pressure on the spray characteristics of a swirl injector by using backlit and stroboscopic visualization techniques and the PDPA system. Qing-Fei Fu et al [8] evaluated the influences of the geometric parameters of an open-end swirl injector on liquid film thickness, spray angle, and dynamic characteristics. Ingyu Lee et al [9] conducted experimental research on the effect of an oxygen/fuel ratio on the atomization characteristics of a double-swirl coaxial injector and obtained the influence law of the oxygen/fuel ratio on the spray angle and average particle diameter.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mass Flow Rate on the Atomization Characteristics of Screw Conveyor Swirl Injectors

Wei

Feng

et al. 2022

Aerospace

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This study conducted cold flow experimental research on the influence of mass flow rate on the atomization characteristics of screw conveyer swirl injectors in an opening environment. The Phase Doppler Particle Analyzer (PDPA) and high-speed photography were utilized to obtain experimental data. The results showed that the mass flow rate greatly influenced the atomization establishment and working characteristics of the injectors. The design point selection of the injectors exerted significant influence on the flow range and the performances of the injectors in a steady-state operation. The Sauter mean diameter of the atomization field continued to decrease with the increase in the mass flow rate. As the distance to the injector exit increased, the Sauter mean diameter continued to decrease, and finally tended to be stable. The average particle diameter obtained by the current image-processing method was greater than that by PDPA; therefore, the image-processing method needs improvement.

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Effects of the number of tangential passages on spray characteristics of a bipropellant atomizer

Alves

Lacava

Martins

2013

J Braz. Soc. Mech. Sci. Eng.

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Geometrical Effects on the Fluid Dynamics of an Open-End Swirl Injector

Cited by 25 publications

References 14 publications

Numerical simulation of the internal flow of swirl atomizer under ambient pressure

Numerical simulation of the internal flow of swirl atomizer under ambient pressure

Influence of Mass Flow Rate on the Atomization Characteristics of Screw Conveyor Swirl Injectors

Effects of the number of tangential passages on spray characteristics of a bipropellant atomizer

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