A Review on Empirical Correlations for Jet/Spray Trajectory of Liquid Jet in Uniform Cross Flow

No, Soo-Young

doi:10.1260/1756-8277.7.4.283

Cited by 55 publications

(23 citation statements)

References 43 publications

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“…These results have been compared to the experimental data [29] on the Figure 4. The numerical simulation results shows a further penetration of the liquid jet as the parameter q increases, in accordance with the experimental results [7]. Near the injection orifice ( x dj = 0.5), the trajectories from numerical simulations are in a good agreement with the experimental observations.…”

Section: Non-dimensionalsupporting

confidence: 85%

“…The first experimental studies [4] focused on large-scale features of the liquid jet breakup, such as trajectory of the jet and column breakup location. In a review paper, No [7] makes an inventory of the empirical correlations for trajectory of the jet. They showed a huge discrepancy between the different correlations obtained from experimental studies.…”

Section: Introductionmentioning

confidence: 99%

“…They showed a huge discrepancy between the different correlations obtained from experimental studies. Indeed, there are many factors that impacts the jet trajectory, and a restricted number of dimensionless numbers cannot characterize totally the jet trajectory over several regimes [7].…”

Section: Introductionmentioning

confidence: 99%

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Multi-scale Eulerian-Lagrangian simulation of a liquid jet in cross-flow under acoustic perturbations

Thuillet¹,

Zuzio²,

Rouzaud³

et al. 2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

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The design of modern aeronautical propulsion systems is constantly optimized to reduce pollutant emissions while increasing fuel combustion efficiency. In order to get a proper mixing of fuel and air, Liquid Jets Injected in gaseous Crossflows (LJICF) are found in numerous injection devices. However, should combustion instabilities appear in the combustion chamber, the response of the liquid jet and its primary atomization is still largely unknown. Coupling between an unstable combustion and the fuel injection process has not been well understood and can result from multiple basic interactions. The aim of this work is to predict by numerical simulation the effect of an acoustic perturbation of the shearing air flow on the primary breakup of a liquid jet. Being the DNS approach too expensive for the simulation of complex injector geometries, this paper proposes a numerical simulation of a LJICF based on a multiscale approach which can be easily integrated in industrial LES of combustion chambers. This approach results in coupling of two models: a two-fluid model, based on the Navier-Stokes equations for compressible fluids, able to capture the largest scales of the jet atomization and the breakup process of the liquid column; and a dispersed phase approach, used for describing the cloud of droplets created by the atomization of the liquid jet. The coupling of these two approaches is provided by an atomization and re-impact models, which ensure liquid transfer between the two-fluid model and the spray model. The resulting numerical method is meant to capture the main jet body characteristics, the generation of the liquid spray and the formation of a liquid film whenever the spray impacts a solid wall. Three main features of the LJICF can be used to describe, in a steady state flow as well as under the effect of the acoustic perturbation, the jet atomization behavior: the jet trajectory, the jet breakup length and droplets size and distribution. The steady state simulations provide good agreement with ONERA experiments conducted under the same conditions, characterized by a high Weber number (We>150). The multiscale computation gives the good trajectory of the liquid column and a good estimation of the column breakup location, for different liquid to air momentum flux ratios. The analysis of the droplet distribution in space is currently undergoing. A preliminary unsteady simulation was able to capture the oscillation of the jet trajectory, and the unsteady droplets generation responding to the acoustic perturbation. Keywords multiscale numerical simulation, liquid jet in gaseous crossflow, acoustic perturbation, Euler-Lagrange coupling IntroductionThe liquid jet in crossflow (LJICF) configuration covers several applications in engineering systems, such as combustion, chemical or even agriculture fields. Particularly in aircraft combustion chambers, systems where the fuel jet is injected normally into an air crossflow are commonly used. Compared with a free jet into a quiescent flow, this configuration enab...

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Section: Non-dimensionalsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-scale Eulerian-Lagrangian simulation of a liquid jet in cross-flow under acoustic perturbations

Thuillet¹,

Zuzio²,

Rouzaud³

et al. 2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

View full text Add to dashboard Cite

show abstract

“…For the purposes of this paper, this research can be subdivided into breakup regime [1][2][3][4][5][6][7][8][9][10][11], mean droplet size and distribution [1][2][3][4][5][12][13][14][15][16][17][18][19], and spray penetration [1][2][3][4][5][6]11,12,[20][21][22][23][24]. Applications are numerous including industrial and agricultural sprays but lend particularly well to avi ation engines including ramjets, scramjets, turbojet augmenters, and liquid rockets.…”

Section: Introductionmentioning

confidence: 99%

Liquid Jets in Subsonic Air Crossflow at Elevated Pressure

Song

Cain

Lee

2014

Journal of Engineering for Gas Turbines and Power

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The breakup, penetration, droplet size, and size distribution of a Jet A-l fuel in air crossflow has been investigated with focus given to the impact of surrounding air pressure. Data have been collected by particle Doppler phased analyzer (PDPA), Mie-scattering with high speed photography augmented by laser sheet, and Mie-scattering with intensified chargecoupled device (ICCD) camera augmented by nanopulse lamp. Nozzle orifice diameter, d," was 0.508 mm and nozzle orifice length to diameter ratio, l,Jd0, was 5.5. Air crossflow velocities ranged from 29.57 to 137.15 mis, air pressures from 2.07 to 9.65 bar, and temper ature held constant at 294.26 K. Fuel flow provides a range offuellair momentum flux ratio (q) from 5 to 25 and Weber number from 250 to 1000. From the results, adjusted correlation of the mean drop size has been proposed using drop size data measured by PDPA as follows: (Do/Di2) = 0.267We"Mqom(pl/p a)OM(pi/pay° >b. This correlation agrees well and shows roles of aerodynamic Weber number, Wea, momentum flux ratio, q, and density ratio, ptlpa. Change of the breakup regime map with respect to surrounding air pressure has been obsen ed and revealed that the boundary betw een each breakup modes can be predicted by a transformed correlation obtained from above correlation. In addi tion, the spray trajectory for the maximum Mie-scattering intensity at each axial location downstream of injector is extracted from averaged Mie-scattering images. From these results, correlations with the relevant parameters including q, xld," density ratio, viscosity ratio, and Weber number are made over a range of conditions. According to spray trajec tory at the maximum Mie-scattering intensity, the effect of surrounding air pressure becomes more important in the farfield. On the other hand, effect of aerodynamic Weber number is more important in the neaifield.

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“…The JICF is a conical fluid dynamics system that exhibits rich physics and is used for many designs, consisting of a fluid injected perpendicularly into another fluid. There have been many studies investigating many aspects of JICF [4,5]. Despite the number of studies done, there have been no studies investigating liquid JICFs injected near there boiling point into a much hotter crossflow.…”

Section: Introductionmentioning

confidence: 99%

Trajectory and Breakup of Cryogenic Jets in Crossflow

Richards

2018

Journal of Propulsion and Power

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This study investigated the breakup processes of subcritical cryogenic jets injected in to subsonic crossflows of heated air. The crossflow speed, temperature, and jet velocity were varied to demonstrate the effect of thermal differences on a jet in crossflow. High speed back-lit photography and Mie scattering were used to examine the primary breakup regimes, trajectory, and breakup points. The breakup regimes show little change from

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A Review on Empirical Correlations for Jet/Spray Trajectory of Liquid Jet in Uniform Cross Flow

Cited by 55 publications

References 43 publications

Multi-scale Eulerian-Lagrangian simulation of a liquid jet in cross-flow under acoustic perturbations

Multi-scale Eulerian-Lagrangian simulation of a liquid jet in cross-flow under acoustic perturbations

Liquid Jets in Subsonic Air Crossflow at Elevated Pressure

Trajectory and Breakup of Cryogenic Jets in Crossflow

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